Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature

YANG Man Li WANG Jing Ya ZONG Xing Yu GUAN Li LI Hui Zhen XIONG Yi Bai LIU Yu Qin LI Ting JI Xin Yu SHANG Xi Yu ZHANG Hui Fang GUO Yang GONG Zhao Yuan ZHANG Lei TONG Lin CHEN Ren Bo FAN Yi Pin QIN Jin WANG Fang LIN Gang SHI Nan Nan WANG Yan Ping MA Yan

YANG Man Li, WANG Jing Ya, ZONG Xing Yu, GUAN Li, LI Hui Zhen, XIONG Yi Bai, LIU Yu Qin, LI Ting, JI Xin Yu, SHANG Xi Yu, ZHANG Hui Fang, GUO Yang, GONG Zhao Yuan, ZHANG Lei, TONG Lin, CHEN Ren Bo, FAN Yi Pin, QIN Jin, WANG Fang, LIN Gang, SHI Nan Nan, WANG Yan Ping, MA Yan. Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature[J]. Biomedical and Environmental Sciences, 2023, 36(10): 930-939. doi: 10.3967/bes2023.035
Citation: YANG Man Li, WANG Jing Ya, ZONG Xing Yu, GUAN Li, LI Hui Zhen, XIONG Yi Bai, LIU Yu Qin, LI Ting, JI Xin Yu, SHANG Xi Yu, ZHANG Hui Fang, GUO Yang, GONG Zhao Yuan, ZHANG Lei, TONG Lin, CHEN Ren Bo, FAN Yi Pin, QIN Jin, WANG Fang, LIN Gang, SHI Nan Nan, WANG Yan Ping, MA Yan. Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature[J]. Biomedical and Environmental Sciences, 2023, 36(10): 930-939. doi: 10.3967/bes2023.035

doi: 10.3967/bes2023.035

Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature

Funds: This study was supported by the Fundamental Research Funds for “National Natural Science Foundation of China” [82274350]; the Central public welfare research institutes [Z0734]; Scientific and technological innovation project of CACMS [CI2021B003, CI2021A01314, CI2021A00704]; National Natural Science Foundation of China [82274350], and COVID-19 project of the National Administration of Traditional Chinese Medicine [GZY-KJS2021-007, 2020ZYLCYJ05-13, 2020ZYLCYJ07-5].
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    Author Bio:

    YANG Man Li, female, born in 1984, MD, majoring in diagnosis and treatment of chronic pathology in Chinese medicine

    WANG Jing Ya, female, born in 1991, PHD, majoring in prevention and treatment of infectious diseases with traditional Chinese medicine

    ZONG Xing Yu, male, born in 1997, BM, majoring in prevention and treatment of infectious diseases with traditional Chinese medicine

    GUAN li, female, born in 1984, MD, majoring in prevention and treatment of infectious disease

    Corresponding author: LIN Gang, MD, E-mail: hljxjs@126.comMA Yan, PHD, E-mail: mayan0825@sina.comWANG Yan Ping, BS, E-mail: wangyanping4816@163.comSHI Nan Nan, PHD, E-mail: 13811839164@vip.126.com
  • WANG Yan Ping, SHI Nan Nan, and MA Yan designed this study. YANG Man Li, WANG Jing Ya and ZONG Xing Yu wrote the first draft of this manuscript. WANG Jing Ya, ZONG Xing Yu and MA Yan conducted statistical analyses. ZONG Xing Yu, LI Hui Zhen, Xiong Yi Bai and MA Yan conducted literature search, data acquisition, and input. LIU Yu qin, LI Ting, JI Xin Yu, SHANG Xi Yu, ZHANG Hui Fang, GUO Yang, GONG Zhao Yuan, ZHANG Lei, TONG Lin, Chen Ren Bo, FAN Yi Pin, and QIN Jin collected data. MA Yan, WANG Yan Ping, WANG Fang, WANG Jing Ya, ZONG Xing Yu, and SHI Nan Nan revised the manuscript. All authors have read and approved the final manuscript.
  • The authors declare that they have no competing interests.
  • &These authors contributed equally to this work.
    • 关键词:
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    •  
    WANG Yan Ping, SHI Nan Nan, and MA Yan designed this study. YANG Man Li, WANG Jing Ya and ZONG Xing Yu wrote the first draft of this manuscript. WANG Jing Ya, ZONG Xing Yu and MA Yan conducted statistical analyses. ZONG Xing Yu, LI Hui Zhen, Xiong Yi Bai and MA Yan conducted literature search, data acquisition, and input. LIU Yu qin, LI Ting, JI Xin Yu, SHANG Xi Yu, ZHANG Hui Fang, GUO Yang, GONG Zhao Yuan, ZHANG Lei, TONG Lin, Chen Ren Bo, FAN Yi Pin, and QIN Jin collected data. MA Yan, WANG Yan Ping, WANG Fang, WANG Jing Ya, ZONG Xing Yu, and SHI Nan Nan revised the manuscript. All authors have read and approved the final manuscript.
    The authors declare that they have no competing interests.
    &These authors contributed equally to this work.
    注释:
    1) AUTHOR CONTRIBUTIONS: 2) CONFLICT OF INTEREST:
  • Figure  1.  Chest CT images of a 57-year-old COVID-19 patient with brucellosis before and after recovery. Case C: (A): On admission, the bronchus of both lungs showed dendritic changes, with surrounding light patchy shadows and blurred margins, suggesting pulmonary bronchitis. (B): before recovery: lung lesions absorbed and reduced compared to that measured at admission. (C): follow up of one week after recovery: there was no deterioration of lung lesions and little change compared with that measured before recovery.

    Figure  2.  The detailed course of four cases during hospitalization.

    Table  1.   Demographics, clinical characteristics, treatment medicines and outcomes of the four COVID-19 patients with brucellosis

    VariablesCase ACase BCase CCase D
    Age (years)54355772
    GenderMaleMaleMaleMale
    OccupationFarmerFarmerFarmerFarmer
    SmokingYESYESYESNO
    DrinkingYESNOYESYES
    Classification of brucellosisActiveNon-activeNon-activeNon-active
    History of brucellosis (years)5214
    History of COVID-19 vaccinationNONONOYES
    Comorbidities (except brucellosis)HyperbilirubinemiaSinus bradycardia;
    Hyperuricemia
    BronchitisNO
    Date of admission2021.01.152021.01.162021.01.162022.04.20
    Date of positive RT-PCR2021.01.142021.01.162021.01.142022.04.20
    Clinical classification of COVID-19MildAsymptomaticModerateModerate
    Symptoms on admission
     Body temperature, °C36.736.236.737.9
     CoughNONONONO
     Sore throatNONONONO
     FatigueNONONONO
     HeadacheNONOYESNO
     AsthmaNONONONO
     AnorexiaNONONONO
     DiarrheaNONONONO
     Nasal obstructionNONONONO
     RhinorrheaNONONONO
    Treatment medicines
     COVID-19
      Western medicines
       AntiviralsAbidor, interferonAbidor, interferonAbidor, interferonNO
       AntibioticsNONONONO
    Hormonal drugs and othersNONONONO
    Traditional Chinese medicineYiqi detoxification soup, Lianhua Qingwen capsuleYiqi detoxification soup, Lianhua Qingwen capsuleYiqi detoxification soup, Lianhua Qingwen capsuleUnionpay Qingwen detoxification oral liquid
     Brucellosis
      DoxycyclineYESNONONO
      RifampicinYESNONONO
      OthersNONONONO
    Date of the first negative RT-PCR2021.01.272021.01.222021.02.042022.04.27
    Date of discharge2021.01.292021.02.042021.02.062022.04.29
    Duration of viral shedding (days)136217
    Duration of hospitalization (days)1419219
    WorsenedNONONONO
    下载: 导出CSV

    Table  2.   Laboratory and CT findings of four cases at admission and discharge

    VariablesCase ACase BCase CCase D
    AdmissionDischargeAdmissionDischargeAdmissionDischargeAdmissionDischarge
    Laboratory funding
     NEU, ×109/L (2−7)6.346.732.973.222.523.443.711.66(↓)
     LY, ×109/L (0.8−4.5)1.991.862.853.032.031.950.69(↓)2.03
     HGB, g/L (120−160)165.00(↑)161.00(↑)158.00162.00(↑)155.00154.00150.00165.00(↑)
     HCT, % (36−50)48.9048.1047.2049.2047.1046.2044.5049.20
     MCH, pg (26.0−31.0)32.10(↑)31.70(↑)32.80(↑)32.30(↑)31.60(↑)31.50(↑)33.70(↑)33.80(↑)
     WBC, ×109/L (4−10)8.849.266.566.864.986.224.834.17
     CRP, mg/L (0−10)< 10.00< 10.00< 10.00< 10.00< 10.00< 10.00< 10.00< 10.00
     TBIL, μmol/L (3−17)64.00(↑)14.306.2011.108.405.909.5010.70
     DBIL, μmol/L (0−7)6.702.801.802.501.601.802.22.20
     IBIL, μmol/L (0−17)57.26(↑)11.464.448.646.804.117.288.53
     PLT, ×109/L (100−300)207.00168.00306.00(↑)320.00(↑)186.00332.00(↑)128.00149.00
     AST, U/L (2−40)19.0016.0024.0028.0027.0035.0016.0019.00
     ALT, U/L (0−78)29.0027.0027.0031.0023.0035.0030.0032.00
     ALP, U/L ( 50−135)96.0195.2062.1575.8781.4589.2786.3092.97
     CK, U/L (46−171)93.0053.9053.3075.6061.0043.90(↓)91.9084.70
     LDH, U/L (110−240)180.00144.00133.00110-240146.00154.00151.00140.00
     D-Dimer, μg/mL (0−0.55)0.130.070.04NR0.040.140.09NR
     UREA, mmol/L (2.5−6.4)7.80(↑)5.126.216.354.124.822.994.17
     PCT, % (0.108−0.272)0.200.160.28(↑)0.31(↑)0.200.29(↑)0.140.18
     Creatinine, μmol/L (42−97)59.4063.3070.7071.0068.2083.1075.9075.70
    CT findings
     No abnormal lesionsNoNoYesYesNoNoNoNo
     Unilateral lung lesionsNoNoNoNoNoNoNoNo
     Bilateral lung lesionsYesYesNoNoYesYesYesYes
      Note. NEU, Neutrophil count; LY, lymphocyte count; HGB, hemoglobin; HCT, human chorionic thyrotropin; MCH, mean corpuscular hemoglobin; WBC, white blood cell count; CRP, C-reactive protein levels; TBIL, total bilirubin; DBIL, direct bilirubin; IBIL, Indirect bilirubin; PLT, platelet count; AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP, alkaline phosphatase; CK, creatine kinase; LDH, lactate dehydrogenase; PCT , Procalcitonin; CT, computed tomography “↑”indicates higher than normal; “↓” lower than normal; Admission, admitted to hospital; Discharge, discharged from hospital.
    下载: 导出CSV

    Table  3.   Demographics, comorbidities, clinical presentation, and treatment medicines and outcome of two cases coinfected COVID-19 and brucellosis in systematic review

    VariablesCase 1[18]Case 2[19]
    Age (years)8920
    GenderMaleMale
    OccupationNRNR
    Country (region)IranTurkey
    Clinical Classification of COVID-19NRNR
    History of brucellosis (Years)8NR
    History of VaccinationsNRNR
    Comorbidities (Except Brucellosis)NRNR
    Symptoms on Admission
     FeverYESYES
     FatigueYESYES
     DyspneaYESNO
     Joint PainNOYES
    Treatment medicines
     COVID-19
       AntiviralsNRHydroxychloroquine
       AntibioticsNRNR
       Hormonal DrugsPrednisolone, DexamethasoneNR
       OthersRespiratory SupportEnoxaparin
     BrucellosisYESYES
       DoxycyclineYESYES
       RifampicinYESYES
       OthersNRNR
    Date of the negative RT-PCRNRNR
    WorsenedYESNO
    下载: 导出CSV

    Table  4.   Laboratory and CT findings of two cases coinfected COVID-19 and brucellosis in systematic review

    VariablesCase 1[18]Case 2[19]
    AdmissionBefore recoveryAdmissionBefore recovery
    Laboratory findings
     WBC, ×109/L {Case 1 (4–10); Case 2 (3.59–9.64)}12.613.1812.5NR
     RBC, ×109/L {Case 1 (4–6)}4.755.37NRNR
     NEU, ×109/L {Case 1(1.9–8.0); Case 2 (1.64–5.95)}NR11.679.5NR
     LY, ×109/L {Case 1 (0.9–5.2); Case 2 (1.12–3.33)}2.20.782.8NR
     HGB, g/dL {Case 1(12–17); Case 2 (13.2–17.2)}13.8NR12.4NR
     CRP, mg/dL {Case 1 (1–6) (0–0.5); Case 2 (0–0.5)}1NR2.6NR
     PLT, ×109/L {Case 1 (100-300); Case 2 (148–339)}203NR163NR
     AST, U/L {Case 1 (10–37); Case 2 (5–34)}27NR22NR
     ALT, U/L {Case 1(10–37); Case 2 (0–55)}15NR40NR
     ALP, U/L {Case 1 (70–330)}164NRNRNR
     LDH, IU/L {Case 1 (Adult < 480)}NRNRNRNR
     D-Dimer, ng/mL, {Case 1 (Negative < 2)}NR100NRNR
     UREA, mg/dL {Case 1 (17–45)}5550NRNR
     Creatinine, (mg/dL){ Case 1 (0.6–1.3)}1.31.2NRNR
     ESR, (mm/h) {Case 2 (0–20)}NRNR32NR
    CT findingsBilateral lung lesionsNRBilateral lung lesionsNR
      Note. WBC, white blood cell count; RBC, red blood cell; NEU, neutrophil count; LY, lymphocyte count; HGB, hemoglobin; CRP, C-reactive protein; PLT, platelet count; AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP, alkaline phosphatase; LDH, lactate dehydrogenase; ESR, erythrocyte sedimentation rate; CT, computed tomography. NR, indicates not record data.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-02-04
  • 录用日期:  2023-03-08
  • 网络出版日期:  2023-03-17
  • 刊出日期:  2023-10-20

Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature

doi: 10.3967/bes2023.035
    基金项目:  This study was supported by the Fundamental Research Funds for “National Natural Science Foundation of China” [82274350]; the Central public welfare research institutes [Z0734]; Scientific and technological innovation project of CACMS [CI2021B003, CI2021A01314, CI2021A00704]; National Natural Science Foundation of China [82274350], and COVID-19 project of the National Administration of Traditional Chinese Medicine [GZY-KJS2021-007, 2020ZYLCYJ05-13, 2020ZYLCYJ07-5].
    作者简介:

    YANG Man Li, female, born in 1984, MD, majoring in diagnosis and treatment of chronic pathology in Chinese medicine

    WANG Jing Ya, female, born in 1991, PHD, majoring in prevention and treatment of infectious diseases with traditional Chinese medicine

    ZONG Xing Yu, male, born in 1997, BM, majoring in prevention and treatment of infectious diseases with traditional Chinese medicine

    GUAN li, female, born in 1984, MD, majoring in prevention and treatment of infectious disease

    通讯作者: LIN Gang, MD, E-mail: hljxjs@126.comMA Yan, PHD, E-mail: mayan0825@sina.comWANG Yan Ping, BS, E-mail: wangyanping4816@163.comSHI Nan Nan, PHD, E-mail: 13811839164@vip.126.com
注释:
1) AUTHOR CONTRIBUTIONS: 2) CONFLICT OF INTEREST:

English Abstract

YANG Man Li, WANG Jing Ya, ZONG Xing Yu, GUAN Li, LI Hui Zhen, XIONG Yi Bai, LIU Yu Qin, LI Ting, JI Xin Yu, SHANG Xi Yu, ZHANG Hui Fang, GUO Yang, GONG Zhao Yuan, ZHANG Lei, TONG Lin, CHEN Ren Bo, FAN Yi Pin, QIN Jin, WANG Fang, LIN Gang, SHI Nan Nan, WANG Yan Ping, MA Yan. Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature[J]. Biomedical and Environmental Sciences, 2023, 36(10): 930-939. doi: 10.3967/bes2023.035
Citation: YANG Man Li, WANG Jing Ya, ZONG Xing Yu, GUAN Li, LI Hui Zhen, XIONG Yi Bai, LIU Yu Qin, LI Ting, JI Xin Yu, SHANG Xi Yu, ZHANG Hui Fang, GUO Yang, GONG Zhao Yuan, ZHANG Lei, TONG Lin, CHEN Ren Bo, FAN Yi Pin, QIN Jin, WANG Fang, LIN Gang, SHI Nan Nan, WANG Yan Ping, MA Yan. Treatment Outcomes in COVID-19 Patients with Brucellosis: Case Series in Heilongjiang and Systematic Review of Literature[J]. Biomedical and Environmental Sciences, 2023, 36(10): 930-939. doi: 10.3967/bes2023.035
    • COVID-19 pandemic is ongoing worldwide, which is a serious public health event of current concern[1-4]. Although studies have shown favorable prognosis for most COVID-19 patients, treatment outcomes for patients with comorbidities are unfavorable compared to patients without comorbidities[5-7], which has been reported by previous studies reported the treatment outcomes of COVID-19 with hypertension, diabetes, tuberculosis, cardiovascular and cerebrovascular diseases[8-11].

      Brucellosis is one of the seven neglected endemic zoonoses, remaining to be the commonest among them, endemic in more than 170 countries and areas, with about 500,000 new cases reported each year, and is still a worldwide issue[12-15]. Despite brucellosis had high cure rate, whereas, relapses, chronicity, potential mortality and sequels, are reasons for considering brucellosis to be a serious threat[16-19]. Currently, limited studies demonstrated the epidemic of COVID-19 combined with brucellosis[20-22]. However, no study on follow-up after discharge have been conducted, which is very important for policy-makers. Our study presented the clinical characteristics, treatment outcome, and follow up after discharge of four COVID-19 patients with brucellosis in Heilongjiang Infectious Disease Hospital from January 15, 2020 to April 29, 2022. Moreover, we also systematically demonstrated the similar cases reported in the literature, two COVID-19 patients and brucellosis coinfection from two case reports had favorable outcome[20-21], we assume that the four COVID-19 cases with brucellosis had good treatment outcome before and after recovery, the results provide reference for clinicians to diagnose and treat patients co-infected with novel coronavirus and brucellosis.

    • All patients were admitted from January 15, 2020 to April 29, 2022 in Infectious Disease Hospital of Heilongjiang Province in China. All COVID-19 patients with brucellosis were laboratory confirmed. The inclusion criteria for COVID-19 patients with brucellosis wereenrolled: (1) confirmed COVID-19 cases with laboratory confirmed; (2) history of brucellosis or diagnosed brucellosis after COVID-19. Patients were excluded if they met any of the following: (1) subjects who refused to participate, (2) lost to follow-up and unable to be contacted.

    • COVID-19 The severity of COVID-19 in our study followed China’s Diagnosis and Treatment Protocol for COVID-19 was referred to the Diagnosis and Treatment Protocol for COVID-19 of China. (1) Mild cases: the clinical symptoms were mild, and no sign of pneumonia was observed on CT image; (2) moderate cases: only having fever and respiratory symptoms with radiological findings of pneumonia on CT image; (3) severe cases were defined as having any of the following: ① respiratory distress and need invasive ventilation, ② pulse oxygen saturation ≤ 93%, or ③ arterial partial pressure of oxygen (PaO2)/oxygen concentration ≤ 300 mmHg.

      Brucellosis Brucellosis was diagnosed according to the Diagnosis of Brucellosis of China[23]: The confirmed patients were diagnosed if they had any of the following: (1) epidemiological contact history: close contact with domestic animals, wild animals (including ornamental animals), livestock products, brucellosis cultures, etc., or residents living in the epidemic area; (2) clinical symptoms and signs should exclude other suspected diseases; (3) laboratory examination: pathogen isolation, test-tube agglutination test, complement binding test and anti-human globulin test were positive.

    • The study was performed following the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA)[24]. A systematic review has been conducted with regard to clinical characteristics, treatment outcome, and follow-up after discharge for COVID-19 patients with brucellosis.

      A comprehensive literature search was conducted in both English database including PubMed, Embase, Cochrane Library, and Chinese database CNKI, CSTJ, CBM, Wanfang Data for clinical studies, following search terms: (“COVID-19” OR “2019-nCoV” OR “SARS-CoV-2” OR “the Novel Coronavirus Pneumonia” OR “NPC”) AND (“Brucellosis”) from the inception date to December 31, 2022. References of important articles were searched manually for possible relevant studies. The inclusion criteria are as follows: (1) unlimited language; (2) clinical research (3) COVID-19 patients with brucellosis; (4) with sufficient patients’ information, including demographic, clinical, laboratory and radiological findings, treatment and outcome. Exclusion criteria are as follows: (1) abstracts from conference proceedings; (2) review articles.

    • Categorical variables were expressed as frequency and percentages (%), and continuous variables were presented as median (IQR) or as mean and standard deviation (SD) based on compliance with normal distribution. All data analyses were performed with SAS version 9.1 (SAS Institute Inc., Cary, NC, USA). The detailed course after discharge were drawn using the Python Matplotlib package (version 3.2.1).

    • Case A Case A is a 54-year-old man with active brucellosis and was screened positive with COVID-19 nucleic acid screening with no other symptoms on January 15, 2020. He had a 36-year history of smoking and a 35-year history of drinking, was admission to the hospital on the same day. He had hyperbilirubinemia according to blood routine examination. Chest CT presented calcification in the upper lobe of the right lung and bulla in the upper lobe of the left lung. The patient was treated with antiviral therapies including abidor and interferon, additionally, he has been treated with doxycycline and rifampin for brucellosis. He had dry throat three days after admission (January 18), and was advised to be treated Lianhua Qingwen granule after inviting doctors of TCM to participate in the consultation. Five days after admission (January 20), antiviral therapies were suspended due to the clinical symptoms improved. On January 24, qualitative serological tests were resulted positive for both IgG and IgM firstly. Reverse transcription-polymerase chain reaction (RT-PCR) was negative on January 27 and 28, respectively. He was cured and discharged from the hospital on January 29, 2021. As of December 31, 2022, the patient was still receiving treatment for the active brucellosis, but had no re-positive or other discomfort symptoms through 23-months’ follow-up after discharge.

      Case B Case B is a 35-year-old man with 2 years of non-active brucellosis and a 13-year history of smoking conducted COVID-19 nucleic acid screening and was detected RT-PCR positive with no other apparent symptoms. He was admitted to the hospital on January 16, 2021. Chest CT presented that no lesions in both lungs. He was diagnosed with sinus bradycardia, hyperuricemia, urine occult blood, and was treated with abidor and interferon, Lianhua Qingwen granule, bacillus licheniformis capsule. Antiviral therapy was discontinued three days after admission (January 19), and Lianhua Qingwen granule was replaced with Yiqi Jiedu decoctioneight days after admission (January 24). During the period of hospitalization, the patient’s condition was stable without aggravation. The patient was discharged on February 4, 2021 in good clinical condition after two subsequent negative nasopharyngeal swabs. As of December 31, 2022, the patient had anxiety and fatigue, but no recurrence of COVID-19 or brucellosis thourgh 22-months’ follow-up after discharge.

      Case C Case C is a 57-year-old man with one year of brucellosis and intermittent headaches for 4 days, he was detected SARS-CoV-2-positive with a nasopharyngeal swab, and was admitted to hospital on January 16, 2021. Chest CT presented texture enhanced, bronchi tree-like changes, and surrounding light flake shadow in both lungs. He was diagnosed as moderate COVID-19, and was treated with antiviral therapies including abidor and interferon, Lianhua Qingwen Granules. He developed fever until 38.6 °C 11 days after admission (January 26, 2021). His temperature returned to normal the next day after taking antipyretic medicine. He started complaining about cough and phlegm 15 days after admission (January 30, 2021). After group consultations with doctors practicing Chinese and Western medicine, he was treated with Yiqi Jiedu decoction, meanwhile all other medications were stopped. In the following days, and clinical symptoms relieved gradually. The patient was discharged in good clinical condition with two subsequent negative nasopharyngeal swabs on February 6, 2021. As of December 31, 2022, the patient had no discomfort, also no recurrence of COVID-19 or brucellosis through 22-months’ follow-up after discharge. Additionally, we compared chest CT images before and after recovery (Figure 1).

      Figure 1.  Chest CT images of a 57-year-old COVID-19 patient with brucellosis before and after recovery. Case C: (A): On admission, the bronchus of both lungs showed dendritic changes, with surrounding light patchy shadows and blurred margins, suggesting pulmonary bronchitis. (B): before recovery: lung lesions absorbed and reduced compared to that measured at admission. (C): follow up of one week after recovery: there was no deterioration of lung lesions and little change compared with that measured before recovery.

      Case D Case D is a 72-year-old man with four years of brucellosis, with fever of 38.0 °C and no other apparent symptoms on April 20, 2022. He was detected SARS-CoV-2 positive with a nasopharyngeal swab on April 20, 2022. When COVID-19 nucleic acid screening, and was admitted to hospital on the same day, he was treated only with Yinlian Qingwen detoxification oral liquid. During the hospitalization, the patient’s condition was stable without aggravation. The patient was discharged in good clinical condition after two subsequent negative nasopharyngeal swabs on April 29, 2021. As of December 31, 2022, the patient had no discomfort, also no recurrence of COVID-19 or brucellosis through 22-months’ follow-up after discharge.

      The detailed information of the four cases is shown in Figure 2, Tables 12.

      Figure 2.  The detailed course of four cases during hospitalization.

      Table 1.  Demographics, clinical characteristics, treatment medicines and outcomes of the four COVID-19 patients with brucellosis

      VariablesCase ACase BCase CCase D
      Age (years)54355772
      GenderMaleMaleMaleMale
      OccupationFarmerFarmerFarmerFarmer
      SmokingYESYESYESNO
      DrinkingYESNOYESYES
      Classification of brucellosisActiveNon-activeNon-activeNon-active
      History of brucellosis (years)5214
      History of COVID-19 vaccinationNONONOYES
      Comorbidities (except brucellosis)HyperbilirubinemiaSinus bradycardia;
      Hyperuricemia
      BronchitisNO
      Date of admission2021.01.152021.01.162021.01.162022.04.20
      Date of positive RT-PCR2021.01.142021.01.162021.01.142022.04.20
      Clinical classification of COVID-19MildAsymptomaticModerateModerate
      Symptoms on admission
       Body temperature, °C36.736.236.737.9
       CoughNONONONO
       Sore throatNONONONO
       FatigueNONONONO
       HeadacheNONOYESNO
       AsthmaNONONONO
       AnorexiaNONONONO
       DiarrheaNONONONO
       Nasal obstructionNONONONO
       RhinorrheaNONONONO
      Treatment medicines
       COVID-19
        Western medicines
         AntiviralsAbidor, interferonAbidor, interferonAbidor, interferonNO
         AntibioticsNONONONO
      Hormonal drugs and othersNONONONO
      Traditional Chinese medicineYiqi detoxification soup, Lianhua Qingwen capsuleYiqi detoxification soup, Lianhua Qingwen capsuleYiqi detoxification soup, Lianhua Qingwen capsuleUnionpay Qingwen detoxification oral liquid
       Brucellosis
        DoxycyclineYESNONONO
        RifampicinYESNONONO
        OthersNONONONO
      Date of the first negative RT-PCR2021.01.272021.01.222021.02.042022.04.27
      Date of discharge2021.01.292021.02.042021.02.062022.04.29
      Duration of viral shedding (days)136217
      Duration of hospitalization (days)1419219
      WorsenedNONONONO

      Table 2.  Laboratory and CT findings of four cases at admission and discharge

      VariablesCase ACase BCase CCase D
      AdmissionDischargeAdmissionDischargeAdmissionDischargeAdmissionDischarge
      Laboratory funding
       NEU, ×109/L (2−7)6.346.732.973.222.523.443.711.66(↓)
       LY, ×109/L (0.8−4.5)1.991.862.853.032.031.950.69(↓)2.03
       HGB, g/L (120−160)165.00(↑)161.00(↑)158.00162.00(↑)155.00154.00150.00165.00(↑)
       HCT, % (36−50)48.9048.1047.2049.2047.1046.2044.5049.20
       MCH, pg (26.0−31.0)32.10(↑)31.70(↑)32.80(↑)32.30(↑)31.60(↑)31.50(↑)33.70(↑)33.80(↑)
       WBC, ×109/L (4−10)8.849.266.566.864.986.224.834.17
       CRP, mg/L (0−10)< 10.00< 10.00< 10.00< 10.00< 10.00< 10.00< 10.00< 10.00
       TBIL, μmol/L (3−17)64.00(↑)14.306.2011.108.405.909.5010.70
       DBIL, μmol/L (0−7)6.702.801.802.501.601.802.22.20
       IBIL, μmol/L (0−17)57.26(↑)11.464.448.646.804.117.288.53
       PLT, ×109/L (100−300)207.00168.00306.00(↑)320.00(↑)186.00332.00(↑)128.00149.00
       AST, U/L (2−40)19.0016.0024.0028.0027.0035.0016.0019.00
       ALT, U/L (0−78)29.0027.0027.0031.0023.0035.0030.0032.00
       ALP, U/L ( 50−135)96.0195.2062.1575.8781.4589.2786.3092.97
       CK, U/L (46−171)93.0053.9053.3075.6061.0043.90(↓)91.9084.70
       LDH, U/L (110−240)180.00144.00133.00110-240146.00154.00151.00140.00
       D-Dimer, μg/mL (0−0.55)0.130.070.04NR0.040.140.09NR
       UREA, mmol/L (2.5−6.4)7.80(↑)5.126.216.354.124.822.994.17
       PCT, % (0.108−0.272)0.200.160.28(↑)0.31(↑)0.200.29(↑)0.140.18
       Creatinine, μmol/L (42−97)59.4063.3070.7071.0068.2083.1075.9075.70
      CT findings
       No abnormal lesionsNoNoYesYesNoNoNoNo
       Unilateral lung lesionsNoNoNoNoNoNoNoNo
       Bilateral lung lesionsYesYesNoNoYesYesYesYes
        Note. NEU, Neutrophil count; LY, lymphocyte count; HGB, hemoglobin; HCT, human chorionic thyrotropin; MCH, mean corpuscular hemoglobin; WBC, white blood cell count; CRP, C-reactive protein levels; TBIL, total bilirubin; DBIL, direct bilirubin; IBIL, Indirect bilirubin; PLT, platelet count; AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP, alkaline phosphatase; CK, creatine kinase; LDH, lactate dehydrogenase; PCT , Procalcitonin; CT, computed tomography “↑”indicates higher than normal; “↓” lower than normal; Admission, admitted to hospital; Discharge, discharged from hospital.
    • The demographic characteristics of participants are shown in the Table 1. All the four patients were enrolled, and the median age was 55.5 (39.75, 68.25) years. All cases were male (100.0%); among them, 2 patients (50.0%) were moderate, one was mild (25.0%) and one was asymptomatic (25.0%), respectively; three cases were smokers and drinkers (75.0%). Additionally, one case was diagnosed with dycardia, hyperuricemia and bronchitis. Additionally, all 4 patients were detected in COVID-19 nucleic acid screening. Case C and D had only headache and fever on admission, respectively. One patient had active brucellosis before covid and 3 patients had nonactive brucellosis before brucellosis.

      Among the laboratory indexes of the 4 patients, IBIL and UREA were increased in case A, PCT was increased in case B, and LY was decreased in case D, while the other indexes showed no obvious abnormal changes. After treatment, all patients showed different degrees of improvementThree patients (75.0%) showed abnormal bilateral lung lesions on admission, and one patient had abnormal unilateral lung lesions. After treatment, lung lesions presented different degrees of absorption (Table 2).

    • All patients (100%) were treated with Traditional Chinese medicine (TCM), and 3 patients (75.0%) received TCM and western medicine (WM). The median durations of viral shedding and hospitalization were 10.0 (6.25, 19.00) and 16.5 (10.25, 20.50) days, respectively. Four patients were cured and discharged after treatment without adverse reaction during hospitalization (Table 1).

    • As of December 31, 2022, four patients completed 8- to 22-months’ follow up, one (25.0%) case had still active brucellosis and no re-positive COVID-19, and three cases (75.0%) have no symptoms of discomfort except one case with fatigue and anxious during the follow-up period.

    • Two papers were finally included according to the inclusion and exclusion criteria[18-19], and no observational clinical trials were found. Furthermore, there were 2 case reports including 2 COVID-19 with brucellosis[18-19], the two cases were presented a detailed course during hospitalization (Tables 34).

      Table 3.  Demographics, comorbidities, clinical presentation, and treatment medicines and outcome of two cases coinfected COVID-19 and brucellosis in systematic review

      VariablesCase 1[18]Case 2[19]
      Age (years)8920
      GenderMaleMale
      OccupationNRNR
      Country (region)IranTurkey
      Clinical Classification of COVID-19NRNR
      History of brucellosis (Years)8NR
      History of VaccinationsNRNR
      Comorbidities (Except Brucellosis)NRNR
      Symptoms on Admission
       FeverYESYES
       FatigueYESYES
       DyspneaYESNO
       Joint PainNOYES
      Treatment medicines
       COVID-19
         AntiviralsNRHydroxychloroquine
         AntibioticsNRNR
         Hormonal DrugsPrednisolone, DexamethasoneNR
         OthersRespiratory SupportEnoxaparin
       BrucellosisYESYES
         DoxycyclineYESYES
         RifampicinYESYES
         OthersNRNR
      Date of the negative RT-PCRNRNR
      WorsenedYESNO

      Table 4.  Laboratory and CT findings of two cases coinfected COVID-19 and brucellosis in systematic review

      VariablesCase 1[18]Case 2[19]
      AdmissionBefore recoveryAdmissionBefore recovery
      Laboratory findings
       WBC, ×109/L {Case 1 (4–10); Case 2 (3.59–9.64)}12.613.1812.5NR
       RBC, ×109/L {Case 1 (4–6)}4.755.37NRNR
       NEU, ×109/L {Case 1(1.9–8.0); Case 2 (1.64–5.95)}NR11.679.5NR
       LY, ×109/L {Case 1 (0.9–5.2); Case 2 (1.12–3.33)}2.20.782.8NR
       HGB, g/dL {Case 1(12–17); Case 2 (13.2–17.2)}13.8NR12.4NR
       CRP, mg/dL {Case 1 (1–6) (0–0.5); Case 2 (0–0.5)}1NR2.6NR
       PLT, ×109/L {Case 1 (100-300); Case 2 (148–339)}203NR163NR
       AST, U/L {Case 1 (10–37); Case 2 (5–34)}27NR22NR
       ALT, U/L {Case 1(10–37); Case 2 (0–55)}15NR40NR
       ALP, U/L {Case 1 (70–330)}164NRNRNR
       LDH, IU/L {Case 1 (Adult < 480)}NRNRNRNR
       D-Dimer, ng/mL, {Case 1 (Negative < 2)}NR100NRNR
       UREA, mg/dL {Case 1 (17–45)}5550NRNR
       Creatinine, (mg/dL){ Case 1 (0.6–1.3)}1.31.2NRNR
       ESR, (mm/h) {Case 2 (0–20)}NRNR32NR
      CT findingsBilateral lung lesionsNRBilateral lung lesionsNR
        Note. WBC, white blood cell count; RBC, red blood cell; NEU, neutrophil count; LY, lymphocyte count; HGB, hemoglobin; CRP, C-reactive protein; PLT, platelet count; AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP, alkaline phosphatase; LDH, lactate dehydrogenase; ESR, erythrocyte sedimentation rate; CT, computed tomography. NR, indicates not record data.

      The first case report[18] was from Iran, a 89-year-old male with COVID-19 admitted to the hospital because of weakness, malaise, weight loss, and lethargy, cough and dyspnea. His chest CT scan presented nodular opacities, with a variable low P O2, elevated transaminases, and a high D- dimer concentration. The patient was admitted to the intensive care unit requiring endotracheal intubation and mechanical ventilation for refractory hypoxia on day 6.

      He had brucellosis 8 years ago and brucella symptoms a few months ago. Then he was detected a positive brucella titer of 1:160 for wright, subsequently, he was diagnosed with active brucellosis, and he then was treated with doxycycline and rifampicin in addition to anti-COVID-19 treatment. The patient was discharged in good clinical condition respiratory symptoms improved after two subsequent RT-PCR-negative. However, the length of hospital stay and nucleic acid turn negative were not described in this paper, and patients were not followed up after discharge.

      The second case report[19] was from Turkey, the case of a 20-year-old male with COVID-19 admitted to the hospital because of weakness, fatigue, fever, and joint pain. Chest CT presented that bilateral pulmonary infiltrate. He was treated with hydroxychloroquine and enoxaparin for 5 days and instructed to maintain isolation at home. However, he complained persistent fever and joint pain after four days, and he developed fever until 38 °C. PCR-test of a second oropharyngeal swab sample was negative for SARS-CoV-2. He was then diagnosed as brucellosis after positive serologic diagnosis of brucellosis and positive at a titer of 1/160 of brucella agglutination, was received doxycycline and rifampicin after diagnosis of brucellosis, and fever and joint pain improved after 10 days of antibiotic treatment. Whereas, the case report did not describe duration of nucleic acid turn negative, also without follow up of COVID-19 after discharge.

    • To our best knowledge, this is the first study to explore treatment outcome before and after recovery. Our study demonstrated that treatment outcome of four COVID-19 patients with brucellosis are favorable without recurrence of COVID-19. In literature, COVID-19 and brucellosis co-infection in two patients from two case reports are also recovered, nonetheless, which lacked of follow up results after discovery.

      Studies have revealed that male brucellosis patients were more than female patients, and presented with obvious occupational characteristics[25]. In our study, 4 patients were all male, and without severe cases, which was consistent with previous studies[20-21]. Additionally, in our study, one patient had active brucellosis before COVID-19, notably, none of the other 3 patients with a history of brucellosis developed active brucellosis. Based on limited study about COVID-19 and brucellosis, it is still unclear whether brucellosis will lead to COVID-19 or whether COVID-19 will further activate brucellosis.

      There were few studies on treatment of COVID-19 and brucellosis, two patients of COVID-19 and brucellosis in two case reports were received with western medicine, although two patients recovered from COVID-19, they were diagnosed with active brucellosis during hospitalization[20-21]. In our study, four patients were treated with TCM during hospitalization, notably, Among the four patients, one patient was treated with traditional Chinese medicine only. However, after 9 days of hospitalization, he recovered and was discharged from the hospital, and there was no recurrence or other sequelae during the follow-up, suggesting that traditional Chinese medicine treatment alone has a favorable outcome for COVID-19 complicated with brucellosis, which can provide reference for clinicians.

      Sequelae are a global concern in COVID-19 patients after recovery, which includes fatigue, dyspnoea, arthromyalgia, depression, anxiety, memory loss, concentration difficulties, and insomnia, etc.[4,26-29] literature published observed that 49% and 19.8% of patients reported at least one symptom at a 12-month and 24-month follow-up, respectively[30-31]. Previous studies had reported that chronic musculoskeletal sequelae of brucellosis occurred in up to 50% of patients with chronic disease[32]. Our results found that only one case felt fatigue and anxious at 22-month follow up, the other three patients did not experience symptoms of discomfort during the 8–22-month follow-up period, and the incidence of sequelae was lower than other studies[30]. Relapse are also a major problems after recovery in COVID-19 and brucellosis, previous study reported 30%–40% of relapse rates in brucellosis[33], and a meta-analysis including 3,644 COVID-19 patients from 41 studies demonstrated 15% of relapse rate, and up to 37% of relapse in Korea[34]. Whereas, no study reported results of follow up after discharge in COVID-19 patients with brucellosis. In our study, no case reoccurred in COVID-19 and brucellosis (except Case A of brucellosis who has not recovered), the findings indicated that COVID-19 patients with brucellosis had favorable prognosis after recovery. The results may be related to the national policy in the context of COVID-19, and the early detection of patients through active testing. Moreover, four cases are non-severe, above reason may had favorable outcome.

    • There are several limitations in the present study. Firstly, this study was conducted in a single center. Secondly, the sample is small. Thirdly, also small sample of only two cases in some literature data is incompleteness, such as the detailed CT findings before recovery, clinical classification of COVID-19, date of recovery for COVID-19, and comorbidities (except brucellosis). Thus, the conclusions of small sample might have bias. Further studies with large-sample, multi-center clinical research need to be conducted to confirm our findings.

    • In summary, to our best knowledge, this study is the first study to describe treatment outcome of COVID-19 with brucellosis before and after recovery, including persistence of symptoms and recurrence of disease, our findings indicated that patients with COVID-19 and brucellosis were treated TCM with/without WM had favorable outcome before and after recovery.

    • This study has been registered in by the Chinese Clinical Trial Registry (ChiCTR2100042177) and was approved by the Institutional Review Bboard of the Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences (No. P20009/PJ09).

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