嬰幼兒致病性大腸埃希菌的毒力基因檢測研究
[Abstract]:Objective To study the distribution of pathogenic Escherichia coli causing infantile diarrhea from molecular biology through isolation and identification of pathogenic Escherichia coli from feces of infantile diarrhea cases and detection of virulent genes in order to reduce the infection rate of pathogenic Escherichia coli in infants and young children. 357 stool specimens of infantile diarrhea cases were cultured in McConkey agar medium after the addition of pathogenic Escherichia coli by EC broth. The suspicious bacteria were identified by API 20E biochemistry. The virulence genes of pathogenic Escherichia coli were detected by polymerase chain reaction (PCR). Results Among the 357 stool specimens of diarrhea patients, 37 pathogenic Escherichia coli carrying virulent genes were detected, the detection rate was 10.36%. The detection rates of enteric aggregated Escherichia coli (EAggEC), enteropathogenic Escherichia coli (EPEC), enteric invasive Escherichia coli (EIEC) and enterohemorrhagic Escherichia coli (EHEC) carrying virulent genes were respectively. Enterotoxigenic Escherichia coli (ETEC) was not detected in 8.4%, 0.56%, 1.12%, 0.28%. Conclusion The pathogenic Escherichia coli in infantile diarrhea cases was mainly caused by EaggEC, followed by EIEC. It was further confirmed that PCR virulence gene detection of diarrhogenic Escherichia coli had important clinical significance.
【作者單位】: 江西省疾病預(yù)防控制中心傳染病預(yù)防控制所;
【基金】:國家科技重大專項基金項目(2013zx10004-203-002)
【分類號】:R378.21
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