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Updated: Mar 21, 2026

Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR RS-PCR
Published on: November 4, 2016
Prospective multicenter surveillance identifies Staphylococcus aureus infections caused by livestock-associated
Rajeshwari Nair1, James Wu2, Margaret Carrel3
1Center for Emerging Infectious Diseases, University of Iowa College of Public Health, Iowa City, IA; Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA.
Abstract:
We conducted a surveillance study to investigate the epidemiology of Staphylococcus aureus infections in Iowa, using a convenience sample. Diagnostic laboratories submitted 20 S. aureus isolates per month for a 20-month period between 2011 and 2013. Of the 2226 isolates analyzed, 73.6% were methicillin-resistant S. aureus (MRSA) and 26.4% were methicillin-susceptible S. aureus (MSSA). S. aureus infections in 25 patients (1%) were caused by ST398- and ST9-associated strain types, and appeared to be a common occurrence in areas of the state with the highest numbers of hogs and hog farms. Twenty nine (5.1%) of MSSA isolates and 10 (40.0%) livestock-associated strains were multi-drug resistant.
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