Survival of livestock-associated methicillin-resistant Staphylococcus aureus CC398 on different surface materials

Tuominen, KristaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Inst för biomedicin och veterinär folkhälsovetenskap,Department of Biomedical Science and Veterinary Public Health (author)

Background Zoonotic livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) is widely spread in pig herds in many countries. However, the knowledge regarding the survival of LA-MRSA in the pig farm environ-ment is currently limited. The aim of this study was to assess the survival of LA-MRSA on different surface materials found in the farm environment. The study investigated the survival of two different LA-MRSA strains belonging to the clonal complex (CC) 398 on four different surfaces: stainless steel, polypropylene plastic, K30 concrete and commercial concrete disk coupons. The survival of the bacteria over time was determined by the viable count method and, where possible, fitting a model to the observed data by using nonlinear least squares method to calculate the half-life ( t1/2) for different strain and material combinations.Results The study showed that the half-life of the bacteria was longer on polypropylene plastic (t(1/2)=11.08- 15.78 days) than on stainless steel (t(1/2)=2.45-7.83 days). On these materials, both LA-MRSA strains survived through the 14 week observation period. The bacterial decay was fastest on the concrete surfaces, where LA-MRSA became undetectable after 3-9 weeks.Conclusions The survival of LA-MRSA in the pig farm environment may be affected by different surface materials. A more frequent sampling protocol (< 7 days) is needed to determine the half-life on concrete surfaces.

Frosth, SaraSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Inst för biomedicin och veterinär folkhälsovetenskap,Department of Biomedical Science and Veterinary Public Health(Swepub:slu)92452 (author)
Sternberg Lewerin, SusannaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Inst för biomedicin och veterinär folkhälsovetenskap,Department of Biomedical Science and Veterinary Public Health(Swepub:slu)46642 (author)
Sveriges lantbruksuniversitetInst för biomedicin och veterinär folkhälsovetenskap (creator_code:org_t)
Sveriges lantbruksuniversitet

In:Acta Veterinaria Scandinavica: Springer Science and Business Media LLC650044-605X1751-0147

About the subject

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Veterinary Scien ...; and Pathobiology

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