Polymerase chain reaction for the diagnosis of bovine genital campylobacteriosis

Pesquisa Veterinária Brasileira

Costa, Mateus M.¹  Machado, Gustavo²  Groff, Ana C.M.²  Kirinus, Jackeline K.²  Silva, Mariana Sá e²  Vargas, Agueda P.C.¹ 

[1] Universidade Federal do Vale do São Francisco, Petrolina, Brazil;Universidade Federal de Santa Maria, Santa Maria, Brazil

关键词: Bovine genital campylobacteriosis;    Campylobacter fetus;    diagnosis;    abortion.;   

DOI  :  10.1590/S0100-736X2010001200005

来源: Colegio Brasileiro de Patologia Animal-CBPA

【 摘 要 】

Bovine genital campylobacteriosis is a common venereal disease of cattle; the prevalence of this disease can be underestimated mostly because of the nature of the etiological agent, the microaerobic Campylobacter fetus subspecies venerealis. The purpose of the current study was to evaluate the utilization of polymerase chain reaction (PCR) in the diagnosis of genital campylobacteriosis in samples obtained from bull prepuce aspirate, cow cervical mucus, and abomasum contents of aborted fetuses, collected into enrichment medium. Five different DNA extraction protocols were tested: thermal extraction, lysis with proteinase K, lysis with guanidine isothiocyanate, lysis with DNAzol, and lysis with hexadecyltrimethylammonium bromide (CTAB). The specificity, sensitivity, and technical application of the PCR assay were also evaluated with clinical samples and compared to bacterial isolation by standard culture. DNA extraction by the CTAB protocol provided better results in PCR, and it was able to detect 63 colony-forming units per ml of C. fetus. Out of 277 clinical samples tested, 68 (24%) were positive for Campylobacter fetus using PCR, while only 8 (2.8%) of the samples were positive by bacterial isolation in solid medium, proving the superiority of the PCR technique when compared to the standard isolation method, and providing evidence for its usefulness as a better screening test in cattle for the diagnosis of bovine genital campylobacteriosis. Index

【 授权许可】

CC BY-NC