Detection and isolation of Shiga toxin-producing Escherichia coli and microbial population counts on Argentinean Kosher beef for export to Israel

Analecta Veterinaria Pub Date : 2023-08-29 DOI:10.24215/15142590e071

V. Brusa, Luis Blainq, Hebe Brasesco, Mariana Bruzzone, Joaquín Buezas, I. Contardi, Diego García, Elda Gómez, Mariela Mariame, L. Medici, G. Moretti, Gonzalo Ochoa, Sandra Petroli, Valeria Superno, A. Sucari, Sergio Dolev, Francisco Vinelli, Román Albanese, M. Signorini, G. Leotta

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引用次数: 1

Abstract

The aim of this study was to provide data on the frequency of Top 7 Shiga toxin-producing Escherichia coli (STEC) and microbial population counts on processed beef from Argentinean Kosher cattle abattoirs authorized to export to Israel. A total of 480 samples (forequarters, primal cuts, trimmings) were taken and analyzed for Top 7 STEC detection and isolation and for mesophilic aerobic organism, coliform and E. coli enumeration. Differences in stx detection and microbial population counts on forequarter samples before and after salting were not statistically significant (P >0.05). All samples were negative for Top 7 STEC. Differences were significant for all microbial counts in primal cuts (P <0.001). Neck samples showed a higher level of contamination with the three groups of microorganisms than fore shank and brisket samples. The prevalence of stx was lower than that reported worldwide and in Argentinean export abattoirs. Salting did not significantly reduce the microbial load on forequarters.

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出口至以色列的阿根廷洁食牛肉产志贺毒素大肠杆菌的检测和分离及微生物种群计数

本研究的目的是提供关于7种产志贺毒素大肠杆菌（STEC）的频率和获准出口到以色列的阿根廷Kosher牛屠宰场加工牛肉的微生物种群计数的数据。共采集并分析了480个样本（前肢、原始切口、辅料），用于前7名STEC检测和分离，以及中温需氧菌、大肠菌群和大肠杆菌计数。盐腌前后第四季度样品的stx检测和微生物种群计数差异无统计学意义（P>0.05）。所有样品的前7个STEC均为阴性。原始切口中的所有微生物计数差异显著（P＜0.001）。颈部样本显示出三组微生物的污染水平高于前胸和胸脯样本。stx的流行率低于世界各地和阿根廷出口屠宰场的报告。腌制并没有显著降低前舱的微生物负荷。

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