Isolation and Antimicrobial Susceptibilities of Bacterial Pathogens from Bovine Pneumonia: 1994–2002
Open Access
- 1 September 2004
- journal article
- research article
- Published by SAGE Publications in Journal of Veterinary Diagnostic Investigation
- Vol. 16 (5), 426-431
- https://doi.org/10.1177/104063870401600510
Abstract
Between 1994 and 2002, a total of 390 (46.3%) Mannheimia haemolytica, 292 (34.7%) Pasteurella multocida, and 160 (19.0%) Histophilus somni were isolated at the Oklahoma Animal Disease Diagnostic Laboratory from lungs from 6–18-month-old beef cattle with pneumonia. The ratio of M. haemolytica isolations to P. multocida isolations decreased from 3.1 in 1994 to 0.8 in 2000 while increasing to 1.5 in 2002. Mannheimia haemolytica isolations significantly ( P < 0.05) decreased from 62.5% in 1994 to between 30.6% and 50.4% in 1998–2002. Pasteurella multocida isolations significantly ( P < 0.05) increased from 20.0% in 1994 to between 28.6% and 47.4% in 1998–2002. Histophilus somni isolations were <19% except in 1998 (40.8%) and 1999 (23%). Antimicrobial susceptibilities for M. haemolytica significantly declined for erythromycin ( P = 0.0001), florfenicol ( P = 0.0004), spectinomycin ( P = 0.0001), and tilmicosin ( P = 0.03). For P. multocida, antimicrobial susceptibilities significantly declined for erythromycin ( P = 0.0001), florfenicol ( P = 0.004), spectinomycin ( P = 0.03), sulfachloropyridizine ( P = 0.028), tetracycline ( P = 0.017), tilmicosin ( P = 0.0001), and trimethoprim/sulfamethoxazole ( P = 0.0003). Antimicrobial susceptibilities for H. somni were variable for spectinomycin and sulfachloropyridizine, whereas susceptibilities to other antibiotics remained consistently high.Keywords
This publication has 9 references indexed in Scilit:
- Effects of vaccination prior to transit and administration of florfenicol at time of arrival in a feedlot on the health of transported calves and detection ofMannheimia haemolyticain nasal secretionsAmerican Journal of Veterinary Research, 2002
- Effects of tilmicosin treatment on Pasteurella haemolytica organisms in nasal secretion specimens of calves with respiratory tract diseaseAmerican Journal of Veterinary Research, 2000
- Taxonomic relationships of the [Pasteurella] haemolytica complex as evaluated by DNA-DNA hybridizations and 16S rRNA sequencing with proposal of Mannheimia haemolytica gen. nov., comb, nov., Mannheimia granulomatis comb. nov., Mannheimia glucosida sp. nov., Mannheimia ruminalis sp. nov. and Mannheimia varigena sp. nov.International Journal of Systematic and Evolutionary Microbiology, 1999
- Economic Impact Associated with Respiratory Disease in Beef CattleVeterinary Clinics of North America: Food Animal Practice, 1997
- Bacterial PneumoniaVeterinary Clinics of North America: Food Animal Practice, 1997
- Dairy Calf PneumoniaVeterinary Clinics of North America: Food Animal Practice, 1997
- Immunogens of PasteurellaVeterinary Microbiology, 1993
- Feedlot Cattle PneumoniasVeterinary Clinics of North America: Food Animal Practice, 1985
- Calf PneumoniaVeterinary Clinics of North America: Food Animal Practice, 1985