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Agreement Among 4 Sampling Methods to Identify Respiratory Pathogens in Dairy Calves with Acute Bovine Respiratory Disease.
Doyle, D; Credille, B; Lehenbauer, T W; Berghaus, R; Aly, S S; Champagne, J; Blanchard, P; Crossley, B; Berghaus, L; Cochran, S; Woolums, A.
Afiliação
  • Doyle D; Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA.
  • Credille B; Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA.
  • Lehenbauer TW; Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, Tulare, CA.
  • Berghaus R; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Tulare, CA.
  • Aly SS; Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA.
  • Champagne J; Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, Tulare, CA.
  • Blanchard P; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Tulare, CA.
  • Crossley B; Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, Tulare, CA.
  • Berghaus L; California Animal Health & Food Safety Laboratory System, University of California, Davis, CA.
  • Cochran S; California Animal Health & Food Safety Laboratory System, University of California, Davis, CA.
  • Woolums A; Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA.
J Vet Intern Med ; 31(3): 954-959, 2017 May.
Article em En | MEDLINE | ID: mdl-28295570
ABSTRACT

BACKGROUND:

Four sampling techniques commonly are used for antemortem identification of pathogens from cattle with bovine respiratory disease (BRD) the nasal swab (NS), guarded nasopharyngeal swab (NPS), bronchoalveolar lavage (BAL), and transtracheal wash (TTW). Agreement among these methods has not been well characterized.

OBJECTIVE:

To evaluate agreement among TTW and NS, NPS, or BAL for identification of viral and bacterial pathogens in dairy calves with BRD. ANIMALS One hundred dairy calves with naturally acquired BRD.

METHODS:

Calves were sampled by all 4 methods. Viral agents were identified by real-time RT-PCR, bacteria were identified by aerobic culture, and Mycoplasma bovis (M. bovis) isolates were speciated by PCR. Agreement among TTW and NS, NPS, or BAL was evaluated by calculating the kappa statistic and percent positive agreement. McNemar's exact test was used to compare the proportions of positive results.

RESULTS:

Agreement among TTW and NS, TTW and NPS, and TTW and BAL, was very good for identification of P. multocida, M. haemolytica, and M. bovis. For bovine respiratory syncytial virus (BRSV), agreement with TTW was moderate for NS, good for NPS, and very good for BAL. For bovine coronavirus (BCV), agreement with TTW was moderate for NS and NPS, and good for BAL. McNemar's test was significant only for BCV, indicating that for this pathogen the proportion of positive results from NS and NPS could not be considered comparable to TTW. CONCLUSIONS AND CLINICAL IMPORTANCE This study provides guidance for veterinarians selecting diagnostic tests for antemortem identification of pathogens associated with BRD.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Infecções Respiratórias / Doenças dos Bovinos Tipo de estudo: Diagnostic_studies / Guideline / Prognostic_studies Limite: Animals Idioma: En Revista: J Vet Intern Med Assunto da revista: MEDICINA INTERNA / MEDICINA VETERINARIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Gabão

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Infecções Respiratórias / Doenças dos Bovinos Tipo de estudo: Diagnostic_studies / Guideline / Prognostic_studies Limite: Animals Idioma: En Revista: J Vet Intern Med Assunto da revista: MEDICINA INTERNA / MEDICINA VETERINARIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Gabão