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 2. Prevalence of S. aureus, MRSA, and MDRSA in the industrial hog operation (IHO) compared to the community referent (CR) group among adult and child study participants, North Carolina, 2014.
Nasal carriage outcome Adults Children
No. pos/total (%) Crude PR (95% CI) Adjusted aPR (95% CI)a No. pos/total (%) Crude PR (95% CI) Adjusted aPR (95% CI)a
Note: CI, confidence interval; MRSA, methicillin-resistant S. aureus; MDRSA, multidrug-resistant S. aureus defined as complete resistance to three or more antibiotic drug classes; pos, positive; PR, prevalence ratio. Dash (—) indicates prevalence ratio not estimated due to low prevalence (< 5%). Complete antibiotic resistance profiles for S. aureus isolates from participant carriers are available in Excel File Table S1.
aAdjusted PR (95% CI) estimated from log-binomial regression model including covariates for level of education of adult participant (< high school, ≥ high school), total number of individuals living in the home (2–3, 4, ≥ 5 people) and the presence of any pets inside or outside of the home.
bDefined as mecA or mecC positivity by PCR.
cDefined as complete resistance to oxacillin.
S. aureus
IHO 104/198 (53) 1.68 (1.32, 2.15) 1.40 (1.07, 1.83) 97/198 (49) 1.60 (1.24, 2.05) 1.50 (1.13, 1.99)
CR 63/202 (31) Reference Reference 62/202 (31) Reference Reference
MRSA genotypeb
IHO 4/198 (2) 28/198 (14) 2.38 (1.25, 4.55) 2.37 (1.14, 4.92)
CR 7/202 (3) Reference Reference 12/202 (6) Reference Reference
MRSA phenotypec
IHO 4/198 (2) 27/198 (14) 2.30 (1.20, 4.40) 2.07 (1.02, 4.23)
CR 7/202 (3) Reference Reference 12/202 (6) Reference Reference
MDRSA
IHO 24/198 (12) 1.53 (0.84, 2.79) 1.14 (0.56, 2.29) 45/198 (23) 2.87 (1.68, 4.90) 2.64 (1.47, 4.75)
CR 16/202 (8) Reference Reference 16/202 (8) Reference Reference