| occurrence of yersinia spp. in foods in brazil. | over the past 9 years, 468 bacterial strains isolated from raw and pasteurized milk, beef and pork, bovine and chicken liver, chicken heart, gizzards and lung sausage, hamburger, cheese and lettuce in different regions of the state of são paulo and in the city of rio de janeiro were received by the reference laboratory for yersinia in brazil. all were confirmed to be yersinia spp. the 468 yersinia isolates were grouped as 184 strains because some of the bacteria isolated from the same food sampl ... | 1991 | 1777388 |
| production of shiga-like toxin among escherichia coli strains and other bacteria isolated from diarrhea in são paulo, brazil. | an elevated level of shiga-like toxin i (slt-i) production was found in 1 of 466 escherichia coli strains studied. among the 34 sonic lysates obtained from classical enteropathogenic e. coli, 5 produced slt-i. the aeromonas, citrobacter, edwardsiella, enterobacter, klebsiella, proteus, providencia, pseudomonas, salmonella, serratia, shigella, yersinia, and vibrio strains also studied were not slt producers, except for a shigella dysenteriae type 1 strain. although slt-i-producing e. coli strains ... | 1990 | 2199511 |
| incidence of yersinia spp. in food in sao paulo, brazil. | this study examined the occurrence of y. enterocolitica and other yersinia species in brazilian food products. samples included raw vegetables (lettuce, spinach, watercress and chicory), raw and pasteurized milk as well as meat and meat products. raw milk samples were obtained in a dairy plant and the other food samples were purchased at the retail level in sao paulo city. yersinia spp. was isolated from raw milk (45.2%), pasteurized milk (14.3%), raw vegetables samples (13.3%) and meat and meat ... | 1994 | 8024978 |
| diversity of somatic coliphages in coastal regions with different levels of anthropogenic activity in sao paulo state, brazil. | bacteriophages are the most abundant and genetically diverse viruses on earth, with their complex ecology in both quantitative and qualitative terms. somatic coliphages (sc) have been reported to be good indicators of fecal pollution in seawater. this study focused on determining the concentration of sc and their diversity by electron microscopy in seawater, plankton and bivalve samples collected at three coastal regions são paulo, brazil. the sc counts varied from <1 to 3.4×10(3) pfu/100ml in s ... | 2011 | 21531842 |