[1] Respiratory Branch of Chinese Pediatric Society of Chinese Medical Association, Editorial Board of Chinese Journal of Applied Clinical Pediatrics. Expert consensus on diagnosis and treatment of Mycoplasma pneumoniae pneumonia in children (2015). Chin J Appl Clin Pediatr, 2015; 30, 1304−8. (In Chinese
[2] Principi N, Esposito S, Blasi F, et al. Role of Mycoplasma pneumoniae and Chlamydia pneumoniae in children with community-acquired lower respiratory tract infections. Clin Infect Dis, 2001; 32, 1281−9. doi:  10.1086/319981
[3] Brown RL, Sequeira RP, Clarke TB. The microbiota protects against respiratory infection via GM-CSF signaling. Nat Commun, 2017; 8, 1512. doi:  10.1038/s41467-017-01803-x
[4] Zeng WW, Yu L, Ding WY, et al. Antibiotic-induced gut microbiota dysbiosis aggravates Mycoplasma pneumoniae infection. Chin J Microbiol Immunol, 2020; 40, 68−73. (In Chinese
[5] Expert Committee on Rational Use of Medicines for Children Pharmaceutical Group, National Health and Family Planning Commission. Expert consensus on laboratory diagnostics and clinical practice of Mycoplasma pneumoniae infection in children in China. Chin J Pediatr, 2020; 58, 366−73. (In Chinese
[6] Dou HW, Tian XJ, Xin DL, et al. Mycoplasma pneumoniae macrolide resistance and MLVA typing in children in Beijing, China, in 2016: is it relevant?. Biomed Environ Sci, 2020; 33, 916−24. (In Chinese
[7] Magoč T, Salzberg SL. FLASH: fast length adjustment of short reads to improve genome assemblies. Bioinformatics, 2011; 27, 2957−63. doi:  10.1093/bioinformatics/btr507
[8] Caporaso JG, Kuczynski J, Stombaugh J, et al. QIIME allows analysis of high-throughput community sequencing data. Nat Methods, 2010; 7, 335−6. doi:  10.1038/nmeth.f.303
[9] Segata N, Izard J, Waldron L, et al. Metagenomic biomarker discovery and explanation. Genome Biol, 2011; 12, R60. doi:  10.1186/gb-2011-12-6-r60
[10] Dominguez-Bello MG, Blaser MJ, Ley RE, et al. Development of the human gastrointestinal microbiota and insights from high-throughput sequencing. Gastroenterology, 2011; 140, 1713−9. doi:  10.1053/j.gastro.2011.02.011
[11] Barko PC, McMichael MA, Swanson KS, et al. The gastrointestinal microbiome: a review. J Vet Intern Med, 2018; 32, 9−25. doi:  10.1111/jvim.14875
[12] Ren XM, Gamallat Y, Liu DJ, et al. The distribution characteristics of intestinal microbiota in children with community-acquired pneumonia under five Years of age. Microb Pathog, 2020; 142, 104062. doi:  10.1016/j.micpath.2020.104062
[13] Li WR, Zhu Y, Liao Q, et al. Characterization of gut microbiota in children with pulmonary tuberculosis. BMC Pediatr, 2019; 19, 445. doi:  10.1186/s12887-019-1782-2
[14] Feng JL, Dai WB, Zhang C, et al. Shen-ling-bai-zhu-san ameliorates inflammation and lung injury by increasing the gut microbiota in the murine model of Streptococcus pneumonia-induced pneumonia. BMC Complement Med Ther, 2020; 20, 159. doi:  10.1186/s12906-020-02958-9
[15] Qin N, Zheng BW, Yao J, et al. Influence of H7N9 virus infection and associated treatment on human gut microbiota. Sci Rep, 2015; 5, 14771. doi:  10.1038/srep14771
[16] Gauguet S, D'Ortona S, Ahnger-Pier K, et al. Intestinal microbiota of mice influences resistance to Staphylococcus aureus pneumonia. Infect Immun, 2015; 83, 4003−14. doi:  10.1128/IAI.00037-15
[17] McDonnell L, Gilkes A, Ashworth M, et al. Association between antibiotics and gut microbiome dysbiosis in children: systematic review and meta-analysis. Gut Microbes, 2021; 13, 1870402. doi:  10.1080/19490976.2020.1870402
[18] Zhang XY, Yang XJ, Zhang ZQ, et al. Analysis of intestinal patients’ flora changes with severe pneumonia based on 16SrDNA sequencing technology. Chin Crit Care Med, 2019; 31, 1479−84. (In Chinese
[19] Wang Y, Yang ZW, Cheng YB, et al. Characteristics of gut microbiota in children with sepsis and influence of probiotic supplementation. Chin J Microbiol Immunol, 2021; 41, 440−7. (In Chinese
[20] Tap J, Mondot S, Levenez F, et al. Towards the human intestinal microbiota phylogenetic core. Environ Microbiol, 2009; 11, 2574−84. doi:  10.1111/j.1462-2920.2009.01982.x
[21] Mariat D, Firmesse O, Levenez F, et al. The Firmicutes/Bacteroidetes ratio of the human microbiota changes with age. BMC Microbiol, 2009; 9, 123. doi:  10.1186/1471-2180-9-123
[22] O'Callaghan A, Van Sinderen D. Bifidobacteria and their role as members of the human gut microbiota. Front Microbiol, 2016; 7, 925.
[23] Whorwell PJ, Altringer L, Morel J, et al. Efficacy of an encapsulated probiotic Bifidobacterium infantis 35624 in women with irritable bowel syndrome. Am J Gastroenterol, 2006; 101, 1581−90. doi:  10.1111/j.1572-0241.2006.00734.x
[24] Lin HC, Su BH, Chen AC, et al. Oral probiotics reduce the incidence and severity of necrotizing enterocolitis in very low birth weight infants. Pediatrics, 2005; 115, 1−4. doi:  10.1542/peds.2004-1463
[25] Ling ZX, Liu X, Guo S, et al. Role of probiotics in Mycoplasma pneumoniae pneumonia in children: a short-term pilot project. Front Microbiol, 2019; 9, 3261. doi:  10.3389/fmicb.2018.03261
[26] Wang Y, Yang ZW, Shi CS, et al. The effects of probiotics on the stabilization of blood glucose and the mechanism in children with severe infectious pneumonia. Parent Enteral Nutr, 2017; 24, 159−63. (In Chinese
[27] Wang Y, Gao L, Zhang YH, et al. Efficacy of probiotic therapy in full-term infants with critical illness. Asia Pac J Clin Nutr, 2014; 23, 575−80.