Multidrug-Resistant and Methicillin-Resistant Staphylococcus aureus (MRSA) in Hog Slaughter and Processing Plant Workers and Their Community in North Carolina (USA)

http://dx.doi.org/10.1289/ehp.1306741



Table 1. Study population characteristics by participant category.
Category Total [= 336 (%)] Worker [= 162 (%)] Household member [= 63 (%)] Community resident [= 111 (%)] χ2 test statistic (df) p-Value
ap-Value was calculated with Fisher’s exact test. bPhenotypic MRSA defined as S. aureus resistant to cefoxitin. cMRSA identified by detection of the mecA gene, genotypic MRSA is a subset of that detected phenotypically. dMDRSA denotes S. aureus non­susceptible to three or more of the anti­microbials used in this study or resistant to cefoxitin.
Age (years)         48.13 (10) < 0.01
18–25 89 (26.5) 24 (14.8) 31 (49.2) 34 (30.6)    
26–35 66 (19.6) 32 (19.8) 10 (15.9) 24 (21.6)    
36–45 65 (19.3) 40 (24.7) 7 (11.1) 18 (16.2)    
46–55 62 (18.5) 43 (26.5) 6 (9.5) 13 (11.7)    
56–82 50 (14.8) 23 (14.2) 8 (12.7) 19 (17.1)    
Sex, female 196 (58.5) 88 (54.7) 41 (65.1) 67 (60.4) 2.26 (1) 0.32
Race/ethnicity         31.07 (6) < 0.01
African American 231 (68.8) 114 (70.4) 46 (73.0) 71 (64.0)    
Hispanic 52 (15.5) 30 (18.5) 13 (20.6) 9 (8.1)    
White non-Hispanic 26 (7.7) 5 (3.1) 1 (1.6) 20 (18.0)    
Native American 18 (5.4) 9 (5.6) 2 (3.2) 7 (6.3)    
Other 9 (2.7) 4 (2.5) 1 (1.6) 4 (3.6)    
Animal contact on home property 161 (47.9) 74 (45.7) 28 (44.4) 59 (53.2) 1.85 (2) 0.42
Medical facility visit in last 6 months 193 (58.0) 89 (54.9) 40 (64.5) 64 (58.7) 1.73 (2) 0.42
MRSA diagnosis in the last year 3 (0.9) 2 (1.2) 1 (1.6) 0 (0.0) a 0.43
Use of anti­microbials in last 6 months 80 (23.8) 37 (22.8) 17 (27.0) 26 (23.4) 0.44 (2) 0.82
Prevalence            
S. aureus 79 (23.5) 35 (21.6) 19 (30.2) 25 (22.5) 1.94 (2) 0.38
Non­susceptible S. aureus 65 (19.4) 28 (17.3) 13 (21.0) 24 (21.6) 0.88 (2) 0.65
MRSA phenotypeb 16 (4.8) 9 (5.6) 3 (4.8) 4 (3.6) 0.55 (2) 0.76
MRSA mecAc 9 (2.7) 5 (3.1) 2 (3.2) 2 (1.8) a 0.74
MDRSAd 23 (6.9) 13 (8.0) 4 (6.5) 6 (5.4) 0.73 (2) 0.70