Absence of livestock-associated methicillin-resistant staphylococcus aureus clonal complex CC398 as a nasal colonizer of pigs raised in an alternative system

Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) ST398 isolated from pigs raised in conventional farms was previously reported. Here we report a study on 25 farms adhering to an alternative system. LA-MRSA ST398 was not detected in nasal swabs from 178 pigs or from 89 humans working and living on these farms.