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Assessing the microbiological quality of raw goats' and ewes' tank milk samples in Switzerland


Friker, Brian; Morach, Marina; Püntener, Sabrina; Cernela, Nicole; Horlbog, Jule Anna; Stephan, Roger (2020). Assessing the microbiological quality of raw goats' and ewes' tank milk samples in Switzerland. International Dairy Journal, 102:104609.

Abstract

In recent years, popularity of raw milk has increased in many industrialised countries. This study (i) enumerated total viable counts (TVC) and Escherichia coli counts, (ii) assessed prevalence of Staphylococcus (S.) aureus, Salmonella spp. and STEC, (iii) screened for methicillin resistant S. aureus (MRSA) and extended-spectrum β-lactamases (ESBL)-producing Enterobacteriaceae in sheep and goat tank milk samples collected throughout Switzerland and (iv) provided further strain characteristics on isolated pathogens and MRSA. One hundred and twenty-three tank milk samples from 116 farms were analysed. The median TVC was 3.8 log cfu mL−1. E. coli was detected in 16 (13.0%) and S. aureus in 18 (14.6%) samples. Polymerase chain reaction for stx genes was positive in 14 (11.4%) samples. MRSA were isolated from 4 (3.3%) samples. Salmonella spp. and ESBL-producing Enterobacteriaceae were not isolated.

Abstract

In recent years, popularity of raw milk has increased in many industrialised countries. This study (i) enumerated total viable counts (TVC) and Escherichia coli counts, (ii) assessed prevalence of Staphylococcus (S.) aureus, Salmonella spp. and STEC, (iii) screened for methicillin resistant S. aureus (MRSA) and extended-spectrum β-lactamases (ESBL)-producing Enterobacteriaceae in sheep and goat tank milk samples collected throughout Switzerland and (iv) provided further strain characteristics on isolated pathogens and MRSA. One hundred and twenty-three tank milk samples from 116 farms were analysed. The median TVC was 3.8 log cfu mL−1. E. coli was detected in 16 (13.0%) and S. aureus in 18 (14.6%) samples. Polymerase chain reaction for stx genes was positive in 14 (11.4%) samples. MRSA were isolated from 4 (3.3%) samples. Salmonella spp. and ESBL-producing Enterobacteriaceae were not isolated.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Food Safety and Hygiene
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Scopus Subject Areas:Life Sciences > Food Science
Life Sciences > Applied Microbiology and Biotechnology
Uncontrolled Keywords:Food Science, Applied Microbiology and Biotechnology
Language:English
Date:1 March 2020
Deposited On:15 Feb 2021 17:03
Last Modified:16 Feb 2021 21:01
Publisher:Elsevier
ISSN:0958-6946
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.idairyj.2019.104609

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