The Prevalence of Antibiotic-Resistant Staphylococcus aureus Nasal Carriage among Industrial Hog Operation Workers, Community Residents, and Children Living in Their Households: North Carolina, USA

http://dx.doi.org/10.1289/EHP35



Table 3. Prevalence of S. aureus with putative markers of livestock association in the industrial hog operation (IHO) compared to the community referent (CR) group among adult and child participants, North Carolina, 2014.
Nasal carriage outcome Adults Children
No. pos/total Prevalence (%) No. pos/total Prevalence (%)
Note: MDRSA, multidrug-resistant S. aureus defined as complete resistance to three or more antibiotic drug classes; MRSA, methicillin-resistant S. aureus; pos, positive. Prevalence ratios not estimated due to low prevalences (< 5%).
aDefined as mecA or mecC positivity by PCR.
bDefined as complete resistance to three or more antibiotic drug classes by disk diffusion.
cS. aureus CC398 defined according to the spa types listed in the Supplemental Material in “Assignment of spa types to clonal complexes (CCs).” All S. aureus CC398 carried intranasally by IHO and CR adult participants were scn-negative, MDRSA. One of two S. aureus CC398 carried intranasally by IHO child participants was scn-negative. All S. aureus CC398 carried intranasally by CR child participants was scn-negative.
dS. aureus CC9 defined according to the spa types listed in the Supplemental Material in “Assignment of spa types to clonal complexes (CCs).” All S. aureus CC9 carried by IHO and CR adult participants were scn-negative. None of the S. aureus CC9 carried intranasally by IHO and CR children were scn-negative.
scn-negative
S. aureus
IHO 25/198 13 7/198 4
CR 5/202 2 4/202 2
MRSAa
IHO 2/198 1 1/198 1
CR 0/202 0 0/202 0
MDRSAb
IHO 19/198 10 5/198 3
CR 3/202 1 1/202 1
CC398c
IHO 7/198 4 2/198 1
CR 1/202 1 2/202 1
CC9d
IHO 12/198 6 1/198 0
CR 2/202 1 1/202 0