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Food as vehicle for AMR

Abstract

Introduction

Enterococci harbouring genes encoding resistance to florfenicol and the oxazolidinone antimicrobial linezolid have emerged among food-producing animals and meat thereof, but few studies have analysed their occurrence in raw meat-based diets (RMBDs) for pets.

Aim

We aimed to examine how far RMBDs may represent a source of bacteria with oxazolidinone resistance genes.

Methods

Fifty-nine samples of different types of RMBDs from 10 suppliers (three based in Germany, seven in Switzerland) were screened for florfenicol-resistant Gram-positive bacteria using a selective culture medium. Isolates were phenotypically and genotypically characterised.

Results

A total of 27 , , and isolates were obtained from 24 of the 59 samples. The , , and genes were identified in 24/27, 6/27 and 5/27 isolates, respectively. Chloramphenicol and linezolid minimum inhibitory concentrations (MICs) ranged from 24.0 mg/L–256.0 mg/L, and 1.5 mg/L–8.0 mg/L, respectively. According to the Clinical and Laboratory Standards Institute (CLSI) breakpoints, 26 of 27 isolates were resistant to chloramphenicol (MICs ≥ 32 mg/L), and two were resistant to linezolid (MICs ≥ 8 mg/L). Multilocus sequence typing analysis of the 17 isolates identified 10 different sequence types (ST)s, with ST593 (n = 4 isolates) and ST207 (n = 2 isolates) occurring more than once, and two novel STs (n = 2 isolates). isolates belonged to four different STs (168, 264, 822, and 1846).

Conclusion

The high occurrence in our sample of Gram-positive bacteria harbouring genes encoding resistance to the critical antimicrobial linezolid is of concern since such bacteria may spread from companion animals to humans upon close contact between pets and their owners.

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2023-02-09
2024-11-21
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2023.28.6.2200496
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High occurrence of Enterococcus faecalis, Enterococcus faecium, and Vagococcus lutrae harbouring oxazolidinone resistance genes in raw meat-based diets for companion animals – a public health issue, Switzerland, September 2018 to May 2020
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Magdalena+N%C3%BCesch-Inderbinen&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Nüesch-Inderbinen Magdalena</a>, <a href="/search?value1=Lore+Heyvaert&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Heyvaert Lore</a>, <a href="/search?value1=Andrea+Treier&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Treier Andrea</a>, <a href="/search?value1=Katrin+Zurfluh&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Zurfluh Katrin</a>, <a href="/search?value1=Nicole+Cernela&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Cernela Nicole</a>, <a href="/search?value1=Michael+Biggel&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Biggel Michael</a>, <a href="/search?value1=Roger+Stephan&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Stephan Roger</a></span>. High occurrence of Enterococcus faecalis, Enterococcus faecium, and Vagococcus lutrae harbouring oxazolidinone resistance genes in raw meat-based diets for companion animals – a public health issue, Switzerland, September 2018 to May 2020. <a href="/content/ecdc">Euro Surveill.</a> 2023;28(6):pii=2200496. <a href="https://doi.org/10.2807/1560-7917.ES.2023.28.6.2200496" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2023.28.6.2200496</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 14 Jun 2022;&nbsp;&nbsp; <span class="generated">Accepted</span>: 04 Nov 2022 </span> </p>
/content/10.2807/1560-7917.ES.2023.28.6.2200496
/content/10.2807/1560-7917.ES.2023.28.6.2200496
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