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	Provedor de dados Arq. Bras. Med. Vet. Zootec. (3) Autor Macedo,C. (3) Marin,J.M. (3) Santo,E. (2) Ambrosin,J.A. (1) Gamez,H.J. (1) Paneto,B.R. (1) Resende,D. (1) Rigobelo,E.C. (1) Schocken-Iturrino,R.P. (1) Ávila,F.A. (1) Mais... Palavra-chave Escherichia coli (3) Antimicrobial agent (1) Antimicrobial resistance (1) Calf (1) Cheese (1) Cow (1) Diarrhea (1) ETEC (1) Genital tract (1) VTEC (1) Virulence factor (1) Virulence factors (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2007 (2) 2006 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Occurrence of toxigenic Escherichia coli in raw milk cheese in Brazil Arq. Bras. Med. Vet. Zootec. Paneto,B.R.; Schocken-Iturrino,R.P.; Macedo,C.; Santo,E.; Marin,J.M.. The occurrence of toxigenic Escherichia coli in raw milk cheese was surveyed in Middle Western Brazil. Fifty samples of cheese from different supermarkets were analyzed for E.coli. The isolates were serotyped and screened for the presence of verotoxigenic E. coli (VTEC) and enterotoxigenic E. coli (ETEC) by Polymerase Chain Reaction (PCR). The susceptibility to thirteen antimicrobial agents was evaluated by the disk diffusion method. E.coli were recovered from 48 (96.0%) of the samples. The serogroups identified were O125 (6.0%), O111 (4.0%), O55 (2.0%) and O119 (2.0%). Three (6.0%) and 1(2.0%) of the E.coli isolates were VTEC and ETEC, respectively. Most frequent resistance was observed to the following antimicrobials: cephalothin (60.0%), nalidixic acid... Tipo: Info:eu-repo/semantics/article Palavras-chave: Escherichia coli; Cheese; VTEC; ETEC; Antimicrobial resistance. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000200035 Prevalence of virulence factors in Escherichia coli strains isolated from the genital tract of healthy cows Arq. Bras. Med. Vet. Zootec. Resende,D.; Santo,E.; Macedo,C.; Marin,J.M.. The prevalence of virulence genes expressing fimbriae, production of hemolysin, colicin and aerobactin, was determined in Escherichia coli isolates from healthy cow’s genital tract not showing clinical signs of infection. The presence of fimbriae expression genes (pap, sfa, afa) was assayed using specific primers in a polymerase chain reaction; none were detected in any of the isolates. Yet, a prevalence of 90.4%, 69.8%, and 28.5% of virulence factors for colicin, hemolysin and aerobactin respectively, was detected in the isolates. Analysis of the bacterial pathogenicity of isolates from the bovine genital tract may contribute towards the understanding of E. coli behavior. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cow; Escherichia coli; Genital tract; Virulence factors. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000300003 Virulence factors of Escherichia coli isolated from diarrheic calves Arq. Bras. Med. Vet. Zootec. Rigobelo,E.C.; Gamez,H.J.; Marin,J.M.; Macedo,C.; Ambrosin,J.A.; Ávila,F.A.. One hundred seventy-three Escherichia coli strains isolated from calves from northwestern São Paulo State, having diarrhea were examined for the production of thermolabile (LT) and thermostable (ST) enterotoxins and for the presence of virulence factors associated with bovine colibacillosis. Eighty-five (49.1%) of the E.coli strains produced toxins; 53 isolates were detected as producing STa toxin, and 9 also produced LT toxin. By PCR, 23 isolates were shown to harbor only the LT-II gene. Nine (5.2%) isolates harbored Shiga toxin genes: four carried the stx2 gene, four the stx1 gene and one carried both. Three of the isolates showing stx1 also carried the eae gene. Among the E. coli isolates examined for susceptibility to 10 antimicrobial agents,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Calf; Diarrhea; Escherichia coli; Virulence factor; Antimicrobial agent. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000300003 Registros recuperados: 3 Primeira ... 1 ... Última

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