[Drug sensitivity of vero toxin-producing Escherichia coli O157:H7 (VTEC O157:H7) isolated from human diarrhea and healthy cows].

As a part of studies on the source of infection of Vero toxin-producing Escherichia coli (VTEC), O157:H7 strains isolated from human infectious enteritis between 1986 and 1995 and O157:H7 strains isolated from feces of milk cows between 2001 and 2003 were subjected to drug sensitivity test with drugs widely used as therapeutic drugs for various infectious diseases in humans and animals, and the following results were obtained. 1) Drug sensitivity tests with 20 drugs were performed in 52 strains derived human from diarrhea and 100 strains derived from milk cows, and resistance was noted in 115 strains (75.7%): 36 of the 52 human diarrhea-derived strains (69.

[Isolation and serotyping of Vero toxin-producing Escherichia coli (VTEC) from pig].

As a part of basic studies to elucidate the source of infection of Verotoxin-producing Escherichia coli (VTEC) infectious disease, fresh feces were collected from pigs raised in Kanto District (A and B Prefectures) and Kyushu District (C and D Prefectures) between April and October in 2000, and isolation, serotyping, toxin typing, and drug sensitivity test of VTEC were performed. 1) Of 411 fecal samples tested, VTEC was isolated from 44 samples (10.7%), consisting of 12 of 112 samples (10.

[Isolation and serotypes of Vero toxin-producing Escherichia coli (VTEC) from pigeons and crows].

To clarify the source and route of infection with Vero toxin-producing Escherichia coli (VTEC) in humans, we sampled gastrointestinal contents and isolated VTEC from wild birds captured to exterminate harmful birds between August 1997 and January 1998. Pigeons were caught in Sagamihara-shi and crows were caught in Sagamihara-shi, Kawasaki-shi, Yokohama-shi, and the Tokyo metropolitan area. The following results were obtained.

[Molecular epidemiological investigation of vero toxin-producing Escherichia coli (VTEC) isolated from diarrhea patients and dairy cattle].

To elucidate the source and route of VTEC infection, we performed pulse field gel electrophoresis (PFGE) an 50 isolates from human diarrhea typed as serotypes O157, O111, and O26, which were very frequently isolated from patients with VTEC infection between 1986 and 1997, and 32 isolates from dairy cattle, a total of 82 isolates. The isolates were genetically analyzed based on the electrophoresis patterns of DNA, and a phylogenetic tree was prepared. The isolates were classified based on similarity > or = 89.