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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