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Recently, a novel  mec  gene conferring beta-lactam resistance in  Staphylococcus aureus  has been discovered. This gene,  mecC , is situated on a SCC mec  XI element that has to date been identified in clonal complexes 49, 130, 425, 599 and 1943. Some of the currently known isolates have been identified from animals. This, and observations of  mecA  alleles that do not confer beta-lactam resistance, indicate that  mec  genes might have a reservoir in  Staphylococcus  species from animals. Thus it is important also to screen wildlife isolates for  mec  genes. Here, we describe  mecC -positive  Staphylococcus aureus  (ST130-MRSA-XI) and the lesions related to the infection in two diseased free-ranging European hedgehogs ( Erinaceus europaeus ). One was found dead in 2003 in central Sweden, and suffered from  S. aureus  septicaemia. The other one, found on the island of Gotland in the Baltic Sea in 2011, showed a severe dermatitis and was euthanised. ST130-MRSA-XI isolates were isolated from lesions from both hedgehogs and were essentially identical to previously described isolates from humans. Both isolates carried the complete SCC mec  XI element. They lacked the  lukF-PV/lukS-PV  and  lukM/lukF-P83  genes, but harboured a gene for an exfoliative toxin homologue previously described from  Staphylococcus hyicus ,  Staphylococcus pseudintermedius  and other  S. aureus  of the CC130 lineage. To the best of our knowledge, these are the first reported cases of CC130-MRSA-XI in hedgehogs. Given that one of the samples was taken as early as 2003, this was the earliest detection of this strain and of  mecC  in Sweden. This and several other recent observations suggest that CC130 might be a zoonotic lineage of  S. aureus  and that SCC mec  XI/ mecC  may have originated from animal pathogens.

Detection of mecC-Positive Staphylococcus aureus (CC130-MRSA-XI) in Diseased European Hedgehogs (Erinaceus europaeus) in Sweden