Bacterial Pathogens
Infections
Reported resistance to antimicrobials used for
treatments
Level of resistance
estimation)a
Clostridium perfringens type B
and C
Enterotoxemia
  +, < 10%
Corynebacterium renale
Cystitis, pyelonephritis
  -, resistance absent;
Escherichia coli (ETEC)
Neonatal colibacillosis
Ampicillin, gentamicin, neomycin, sulfas,
tetracycline,
trimethoprim-sulfamethoxazole
++, 10 - 50%
Haemophilus somnus
Infectious thromboembolic
meningoencephalitis, hemophilosis,
myocarditis, pneumonia, polyarthritis
  ±, uncertain
Leptospira
Leptospirosis
  -, resistance absent;
Mannheimia haemolytica
Pneumonic pasteurellosis
Gentamicin, neomycin, penicillin, sulfas,
tetracycline, trimethoprim-sulfa
++, 10 - 50%
Moraxella bovis
Infectious bovine
keratoconjunctivitis
  ++, 10 - 50%
Mycobacterium avium ssp
paratuberculosis
Paratuberculosis
  -, resistance absent;
Pasteurella multocida
Pneumonic pasteurellosis
Gentamicin, neomycin, penicillin
tetracycline, trimethoprim- sulfa
+, < 10%
Salmonella
Salmonellosis, septicemia
Ampicillin, gentamicin, neomycin,
tetracycline, trimethoprim-sulfa sulfa
++, 10 - 50%
Staphylococcus aureus
Mastitis
Erythromycin, penicillin, pirlimycin,
tetracycline
+, < 10%
  Mastitis
Erythromycin, penicillin, spectinomycin,
tetracycline
+, < 10%
Ureaplasma
Granular vulvitis
  ±, uncertain
       


Uses of Antimicrobials in Food Animals in Canada: Impact on Resistance and Human Health
http://www.hc-sc.gc.ca/dhp-mps/pubs/vet/amr-ram_final_report-rapport_06-27_table_21-eng.php

Table 7.2: Major cattle pathogens and antimicrobial resistance characteristics in Canada