Antimicrobial susceptibility patterns of respiratory tract pathogens from sheep and goats.
OBJECTIVE
To determine the antimicrobial susceptibility of common respiratory tract pathogens from sheep and goats.


METHODS
Cross-sectional study.


METHODS
41 respiratory tract isolates from sheep and 36 isolates from goats.


METHODS
Disk diffusion assay was used to determine antimicrobial susceptibility of isolates to amoxicillin-clavulanic acid, ceftiofur, ciprofloxacin, florfenicol, and tetracycline. Minimum inhibitory concentrations of florfenicol for these isolates were determined by use of the microbroth dilution technique.


RESULTS
The most common isolates were Pasteurella multocida (n = 28) and Mannheimia haemolytica (39). All isolates were susceptible to amoxicillin-clavulanic acid, ceftiofur, ciprofloxacin, and florfenicol. Five percent (4/77) of isolates were resistant to tetracycline.


CONCLUSIONS
Susceptibility of respiratory tract pathogens isolated from sheep and goats to commonly used antimicrobial drugs in this study was high. Treatment of these species for bacterial respiratory tract disease is likely not complicated by antimicrobial resistance.
Berge
Anna Catharina B
AC
Department of Population Health and Reproduction, Veterinary Medical Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
Sischo
William M
WM
Craigmill
Arthur L
AL
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D003430:Cross-Sectional Studies; D004305:Dose-Response Relationship, Drug; D024881:Drug Resistance, Bacterial; D015511:Goat Diseases / Q000188:drug therapy / Q000382:microbiology*; D006041:Goats; D016978:Mannheimia haemolytica / Q000187:drug effects* / Q000254:growth & development; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D010326:Pasteurella Infections / Q000188:drug therapy / Q000382:microbiology / Q000662:veterinary*; D016979:Pasteurella multocida / Q000187:drug effects* / Q000254:growth & development; D016871:Pasteurellaceae Infections / Q000188:drug therapy / Q000382:microbiology / Q000662:veterinary*; D012141:Respiratory Tract Infections / Q000188:drug therapy / Q000382:microbiology / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000188:drug therapy / Q000382:microbiology*
D000900:Anti-Bacterial Agents