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Table 3 Most frequent antimicrobial pairings as reported within OSVS records (July 1, 2007 – June 30, 2009)

From: Describing antimicrobial use and reported treatment efficacy in Ontario swine using the Ontario swine veterinary-based Surveillance program

Combination

Number of records (N = 676)

Penicillin + tetracycline

24

Penicillin + ceftiofur

16

Penicillin + sulfonamide

13

Sulfonamide + tetracycline

9

Neomycin + tetracycline

8

Tulathromycin + ceftiofur

8

Sulfonamide + trimethoprim

8

Penicillin + sulfonamide + tetracycline

7