Prevalence and molecular characterization of sorbitol fermenting and non-fermenting Escherichia coli O157:H7+/H7– isolated from cattle at slaughterhouse and slaughterhouse wastewater

Prevalence and characterization of Escherichia coli O157:H7 from samples along the production line in Chinese beef-processing plants

“…In the present study, the eaeA and EHEC-hlyA genes were detected in all six of the isolates. This result corresponds with previous results demonstrating that almost all of the isolated E. coli O157:H7 strains were positive for eaeA and/or EHEC-hlyA (Ayaz et al, 2014;Elder et al, 2000;Osaili et al, 2013). Along with these previous studies, the results of the present study indicate that eaeA and EHEC-hlyA are very common in E. coli O157:H7 strains.…”

“…This result is consistent with a previous study in Northern Ireland, in which 780 carcasses were sampled but none was positive for E. coli O157:H7 (Madden, Espie, Moran, McBride, & Scates, 2001). In contrast, other studies demonstrated a much higher prevalence of E. coli O157:H7 not only before the intervention treatment was used (3.1%e43%) but also after the treatment (0.3%e3.9%) Ayaz, Gencay, & Erol, 2014;Barkocy-Gallagher et al, 2003;Elder et al, 2000;Osaili, Alaboudi, & Rahahlah, 2013;Prendergast et al, 2010;Rivera-Betancourt et al, 2004).…”

“…Feces and hides have been considered the main sources of possible carcass contamination during slaughter (Nastasijevic et al, 2009), and many previous studies reported a very high occurrence in fecal samples (1.8%e 22.7%) (Barkocy-Gallagher et al, 2003;Elder et al, 2000;Prendergast et al, 2010;Smith et al, 2001) and in hide samples (28.2%e75.7%) Nastasijevic et al, 2009;RiveraBetancourt et al, 2004). Different from the previous studies, our study might indicate a relatively low prevalence of E. coli O157:H7 in the lairage of Chinese plants.…”

Prevalence of Asymptomatic Carriers of Shiga Toxin-Producing Escherichia Coli (STEC) in Dairy Cattle Farms in the Governorate of Blida (Algeria)

“…The high frequency of stx2 gene occurrence in adult cows has been reported by few authors (1,13). The low rate of stx2 occurrence might be associated with the relatively young age of animals in Algerian herds.…”

Prevalence of pathogenic and antibiotics resistant Escherichia coli from effluents of a slaughterhouse and a municipal wastewater treatment plant in Dakar

“…This is in full agreement with the observation that Bfp is only produced in human strains, with the exception of a few strains from dogs and cats (Goffaux et al, 2000;Chen and Frankel, 2005). Other studies showed the presence of eae-positive E. coli isolates in effluents from human and animal origin (Holler et al, 1999;Vernozy-Rozand et al, 2004;Garcia-Aljaro, 2005;Awais et al, 2007;Ayaz et al, 2014). Loukiadis et al (2006) detected 54 eaepositive E. coli isolates among 5,001 isolates from various effluents from 12 slaughterhouses in France.…”