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Table 2 Prevalence of S. aureus according to breeding type, breed and antimicrobial treatment

From: Prevalence, molecular epidemiology, and antimicrobial resistance of methicillin-resistant Staphylococcus aureus from swine in southern Italy

Variable Category No. of farms No. of sampled animals S. aureus-positive MRSA-positive
No. (%) P-value No. (%) P-value
Breeding type Intensive 25 405 350 (86.4) NS 218 (53.8) > 0.001
Non-intensive 7 70 40 (57.1) 1 (1.4)
Total 32 475 390 (82.1)   219 (46.1)  
Breed Black pig 11a 77 47 (61.0) NS 7 (9.1) > 0.001
Other breeds 25 398 343 (86.2) 212 (53.3)
Total 32 475 390 (82.1)   219 (46.1)  
Antimicrobial treatment Treatedb 60 57 (95.0) NS 45 (75.0) 0.010
Untreated 415 333 (80.2) 174 (41.9)
Total 475 390 (82.1)   219 (46.1)  
  1. aA minority of black pigs were occasionally reared also in 4 intensive farms
  2. bOngoing or suspended in the last twenty days
  3. NS, Not significant