Abstract
The present study was undertaken to investigate the effect of lactic acid (LA), acetic acid, (AA) and trisodium phosphate (TSP) spray on the microbiological population of beef carcass surfaces slaughtered in a traditional abattoir in Zagazig, Egypt. Higher microbial populations were determined on the shoulder than on the thigh surfaces, and meat sampling by tissue excision technique yielded significantly higher (P < 0.01) microbial count than swabbing method. The application of LA (2%), AA (2%), and TSP (12%) sprays for 30 seconds significantly (P < 0.01) reduced the microbial population counts on the beef surfaces by 0.9 to 2.2 logs. A complete inhibition of enterococci growth was achieved by LA and AA sprays. In general, LA and AA sprays were more efficient as antimicrobial agents than the TSP spray. Among the studied organisms, enterococci were the most reducible bacteria by LA and AA, followed by Enterobacteriaceae and coliforms, while Staphylococcus aureus being the least. This study also indicated that microbial populations determined on the shoulder were higher than on the thigh surfaces, and meat sampling by tissue excision technique yielded significantly higher (P < 0.01) microbial count than swabbing method.
Highlights
Contamination of meat carcasses during slaughtering and processing is an inevitable process
The present study was undertaken to investigate the effect of lactic acid (LA), acetic acid (AA), and trisodium phosphate (TSP), as safe organic decontaminating agents, on the microbiological population of aerobic bacteria, including Enterobacteriaceae, enterococci, coliforms, and Staphylococcus aureus present on the beef carcasses, obtained in an old traditional abattoir in Zagazig, Egypt
In order to examine the efficiency of the tested LA, AA, and TSP, as organic decontaminating agents, we investigated their influence on the microbiological population of aerobic bacteria, Enterobacteriaceae, enterococci, coliforms, and S. aureus, respectively, present on the beef carcasses slaughtered in traditional abattoir in Zagazig, Egypt
Summary
Contamination of meat carcasses during slaughtering and processing is an inevitable process. Many modern abattoirs equipped with modern and sophisticated machinery and equipment are in service in Cairo and some other big cities in Egypt, slaughtering in the majority of the Governorates, including Sharkia (Zagazig), is BioMed Research International still applied in the old traditional abattoirs In this slaughtering units, the dressing of cattle carcasses is conducted on the floor, along with the poorly applied hygienic standards that can lead to a greater microbial contamination of the meat, which mostly retailed in the domestic market, where is stored at abusive temperature to be sold directly to the consumers [8]. The present study was undertaken to investigate the effect of lactic acid (LA), acetic acid (AA), and trisodium phosphate (TSP), as safe organic decontaminating agents, on the microbiological population of aerobic bacteria, including Enterobacteriaceae, enterococci, coliforms, and Staphylococcus aureus present on the beef carcasses, obtained in an old traditional abattoir in Zagazig, Egypt. In order to fulfill the main objectives of the present study, a preliminary investigation was done that is aimed at defining the better strategy between tissue excisions and swabbing techniques to determine the microbial counts on beef carcass surfaces under the influence of the chemical decontaminants
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