志贺氏菌
志贺氏菌病
腹泻
微生物学
福氏志贺氏菌
痢疾
生物
血性腹泻
聚合酶链反应
宋内志贺氏菌
人口
医学
病毒学
大肠杆菌
内科学
基因
遗传学
环境卫生
作者
Vũ Đình Thiểm,Orntipa Sethabutr,Lorenz von Seidlein,Tran Van Tung,Do Gia Canh,Bui Trong Chien,Le Huu Tho,Hyejon Lee,Huo-Shu H Houng,Thomas L. Hale,John D. Clemens,Carl J. Mason,Dang Duc Trach
标识
DOI:10.1128/jcm.42.5.2031-2035.2004
摘要
ABSTRACT Shigella spp. are exquisitely fastidious gram-negative organisms which frequently escape detection by traditional culture methods. To get a more complete understanding of the disease burden caused by Shigella in Nha Trang, Vietnam, real-time PCR was used to detect Shigella DNA. Randomly selected rectal swab specimens from 60 Shigella culture-positive patients and 500 Shigella culture-negative patients detected by population-based surveillance of patients seeking care for diarrhea were processed by real-time PCR. The target of the primer pair is the invasion plasmid antigen H gene sequence ( ipaH ), carried by all four Shigella species and enteroinvasive Escherichia coli. Shigella spp. could be isolated from the rectal swabs of 547 of 19,206 (3%) patients with diarrhea. IpaH was detected in 55 of 60 (93%) Shigella culture-positive specimens, whereas it was detected in 87 of 245 (36%) culture-negative patients free of dysentery ( P < 0.001). The number of PCR cycles required to detect a PCR product was highest for culture-negative, nonbloody diarrheal specimens (mean number of cycles to detection, 36.6) and was lowest for children with culture-positive, bloody diarrheal specimens (mean number of cycles, 25.3) ( P < 0.001). The data from real-time PCR amplification indicate that the culture-proven prevalence of Shigella among patients with diarrhea may underestimate the prevalence of Shigella infections. The clinical presentation of shigellosis may be directly related to the bacterial load.
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