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Detection of Methicillin Resistant Staphylococcus aureus in Iberian pigs


April 1st, 2012

Investigation published in Letters in Applied Microbiology


Aims: Iberian pigs are bred in Spain for production of high-value dry-cured products, whose export volumes are increasing. Animals are typically reared outdoors, though indoor farming is becoming popular. We compared carriage of Methicillin Resistance Staphylococcus aureus (MRSA) in Iberian pigs, raised indoors and outdoors, with intensively farmed Standard White pigs. Methods and Results:  From June 2007 to February 2008, 106 skin swabs were taken from Iberian pigs and 157 samples from Standard White pigs at slaughterhouses in Spain. We found that Iberian pigs carried MRSA, though with a significantly lower prevalence (30/106; 28%) than Standard White pigs (130/157; 83%). A higher prevalence of indoor Iberian pigs compared to animals reared under outdoor conditions was not significant, however all but one positive indoor Iberian pig samples were detected from one slaughterhouse. Overall, 16 different spa types were identified, with t011 predominating in all three animal populations. A subset of isolates was characterized by MLST. Most of these belonged to ST398. MRSA isolates from Iberian pigs presented a higher susceptibility to antibiotics than those isolated from Standard White pigs. Conclusions:  Despite limited contact with humans, pigs raised outdoors are colonized by an MRSA population that genetically overlaps with that of intensively farmed pigs, though antimicrobial resistance is lower. Significance and impact of the study:  To our knowledge, this is the first detection of MRSA in food animals raised in free-range conditions




Porrero MC., Wassenaar TM., Gomez S., Garcia M., Barcena C., Alvarez J., Saez JL., Fernandez-Garayzabal JF., Moreno MA. and Dominguez L..




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Detection of Methicillin Resistant Staphylococcus aureus in Iberian pigs

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Detection of Methicillin Resistant Staphylococcus aureus in Iberian pigs





Letters in Applied Microbiology
FACTOR YEAR Q
1.629 2012

NLMID: 8510094

PMID: 22251394

ISSN: 0266-8254



TITLE: Detection of Methicillin Resistant Staphylococcus aureus in Iberian pigs


JOURNAL: Lett. Appl. Microbiol.


NUMERACIÓN: 54(4):280-285


AÑO: 2012


PUBLISHER: Published for the Society for Applied Bacteriology by Blackwell Scientific Publications


AUTHORS: Porrero MC., Wassenaar TM., Gomez S., Garcia M., Barcena C., Alvarez J., Saez JL., Fernandez-Garayzabal JF., Moreno MA. and Dominguez L..


DOI: http://dx.doi.org/ 10.1111/j.1472-765X.2012.03207.x


CITE THIS PUBLICATION:

Porrero MC., Wassenaar TM., Gomez S., Garcia M., Barcena C., Alvarez J., Saez JL., Fernandez-Garayzabal JF., Moreno MA. and Dominguez L.. Detection of Methicillin Resistant Staphylococcus aureus in Iberian pigs. Letters in Applied Microbiology. 54(4):280-285. 2012. ISSN: 0266-8254. DOI: 10.1111/j.1472-765X.2012.03207.x