2008
DOI: 10.1016/j.ijfoodmicro.2008.06.023
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Diversity of virulence profiles of Shiga toxin-producing Escherichia coli serotypes in food-producing animals in Brazil

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Cited by 49 publications
(60 citation statements)
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“…In different studies on STECs isolated from sheep and goats, this pathotype mostly do not carry stx2 and eae (28,(35)(36)(37)(38). Oliveira et al (32) reported lacking of eae gene among the STECs from ruminants which is almost in agreement with our observation in goats. Since, there are other virulence genes which have been described in eae-negative STECs, such as saa (STEC-autoagglutinating adhesin) and astA (enteroaggregative heat-stable enterotoxin), we suggest checking these sequences in similar studies, too (39,40).…”
Section: Discussionsupporting
confidence: 91%
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“…In different studies on STECs isolated from sheep and goats, this pathotype mostly do not carry stx2 and eae (28,(35)(36)(37)(38). Oliveira et al (32) reported lacking of eae gene among the STECs from ruminants which is almost in agreement with our observation in goats. Since, there are other virulence genes which have been described in eae-negative STECs, such as saa (STEC-autoagglutinating adhesin) and astA (enteroaggregative heat-stable enterotoxin), we suggest checking these sequences in similar studies, too (39,40).…”
Section: Discussionsupporting
confidence: 91%
“…The broad range of detection of STEC was reported in other investigations in Germany (56.1%), Spain (47.7%), Bangladesh (10.0%), and Nigeria (7.5%) (28)(29)(30)(31). In the current study, the genotypic profile stx1 had the most frequency (12%) followed by stx1/stx2 (4%), eae (2.8%), stx1/eae (0.8%), and stx2 (0.4%) which is comparable with other studies carried out by other researchers; Oliveira et al (32) reported the genetic profiles stx1, stx2, and stx1/stx2, with the prevalence rates of 24.1%, 34.7%, and 41.2%, respectively. These rates were 69.8% (stx1), 0.9% (stx2), and 22.5% (stx1 and stx2) in the study by Cortes et al (29).…”
Section: Discussionsupporting
confidence: 89%
“…The stx genes were found in different streams with high urbanisation and also in preserved forest (García-Aljaro et al, 2005;Higgins et al, 2005;Muniesa et al, 2006). Our results show that EHEC was genotyped as stx1 + /stx2 + at the urban site; however the stx2 gene was less than the detection limit in the rural area of the study, which is relevant and worrisome since the stx2 gene is believed to be commonly associated with more severe illnesses (Oliveira et al, 2008). An interesting observation is that the same pathotypes were also found in regional studies with urban pigeons and isolates from human diarrheic feces, indicating the circulation of the same genes in different samples from the city of Juiz de Fora (Silva et al, 2009;.…”
Section: Discussionmentioning
confidence: 65%
“…Um outro fator importante a ser discutido é a baixa frequência de isolados de STEC nas amostras de couro e carcaça relatada por este e outros estudos anteriormente citados, que contrasta com o elevado número dessas cepas detectadas em fezes de bovinos hígidos ou com diarréia no Brasil (Cerqueira et al, 1999;Irino et al, 2005;Rigobelo et al, 2006;Aidar-Ugrinovich et al, 2007;Farah et al, 2007;Oliveira et al, 2008). Isso demonstra que o abatedouro emprega medidas preventivas, como as boas práticas de higiene, que estão sendo eficientes nas etapas de abate, principalmente durante a remoção do couro e na evisceração, onde a probabilidade de contaminação é maior, podendo colocar em risco a inocuidade do produto.…”
Section: Reação De Polimerização Em Cadeia (Pcr)unclassified