production of yersinia stable toxin (yst) and distribution of yst genes in biotype 1a strains of yersinia enterocolitica.two hundred and fifty nine isolates of yersinia enterocolitica and related species were examined for the production of heat-stable enterotoxin (yersinia stable toxin; yst) as well as for the prevalence of enterotoxin genes, viz. ysta, ystb and ystc. under the conventional conditions used for the production of y. enterocolitica enterotoxin, i.e. in tryptic soy broth (tsb) supplemented with yeast extract at 28 degrees c for 48 h, 77.7 % of clinical isolates and 62.3 % of swine isolates showed ente ...200415496381
isolation of yersinia from raw meat (pork and chicken) and precooked meat (porcine tongues and sausages) collected from commercial establishments in mexico city.a total of 160 meat product samples were collected from commercial outlets in mexico city to investigate the presence of different species of yersinia by the 4 degrees c enrichment method after 1, 3, 5, and 7 days of incubation using alkaline treatment and isolating in cefsulodin-irgasan-novobiocin and macconkey agars with tween 80. overall, yersinia spp. were isolated from 27% of the samples analyzed, whereas 40% of the raw and only 13% of the precooked samples were contaminated. although 2,970 ...200010772223
yersinia spp. in surface water in matsue, japan.yersinia spp. (741 strains) were recovered from 81% of 48 surface water samples collected over a 12-month period from four rivers in matsue, japan. the precipitation methods with fecl3 or kaolin and the cold enrichment method with peptone-mannitol-phosphate buffer solution were used for recovery. isolates belonged to yersinia enterocolitica (ye) (133 strains), yersinia intermedia (511 strains), yersinia frederiksenii (57 strains), yersinia kristensenii (10 strains) and x2-like organisms (30 stra ...19846475378
occurrence of yersinia spp. in raw beef, pork and hundred and twenty raw ground beef, pork and chicken samples from ten local grocery stores during a one year period were assayed for the presence of yersinia spp., using direct and postenrichment koh treatment. seven thousand and fifty-five different isolates were recovered from 119 (99%) samples of beef and pork and 118 (98%) samples of chicken, including 27 yersinia enterocolitica serotype 03 biotype 3b phage type 2 (4 pork samples), 4 y. enterocolitica serotype 03 biotype 4 phage type 8 ( ...19873113096
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