title: Detection and differentiation of Leptospira spp. serovars in bovine semen by polymerase chain reaction and restriction fragment length polymorphism.
abstract: In view of the importance of venereal transmission of bovine leptospirosis, the objective of the present study was to apply the polymerase chain reaction (PCR) to 26 serovars of Leptospira interrogans, L. borgpetersenii, L. santarosai, L. noguchii and L. biflexa, to determine the detection threshold in semen samples and to evaluate the possibility of differentiation among serovars using 19 restriction endonucleases. The results showed that all serovars were amplified and the detection threshold in semen samples of a bull was 100 bacteria/ml. Using endonucleases we could classify the 26 serovars into eight groups. The present results show that PCR is a method of great potential for the detection of Leptospira spp. at bovine artificial insemination centers.
authors.affiliation: Department of Preventive Veterinary Medicine and Animal Health, University of São Paulo, São Paulo, Brazil.
authors.forename: M B
authors.initials: MB
authors.lastname: Heinemann
authors.forename: J F
authors.initials: JF
authors.lastname: Garcia
authors.forename: C M
authors.initials: CM
authors.lastname: Nunes
authors.forename: F
authors.initials: F
authors.lastname: Gregori
authors.forename: Z M
authors.initials: ZM
authors.lastname: Higa
authors.forename: S A
authors.initials: SA
authors.lastname: Vasconcellos
authors.forename: L J
authors.initials: LJ
authors.lastname: Richtzenhain
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis / Q000382:microbiology* / Q000517:prevention & control; D017931:DNA Primers / Q000737:chemistry; D004269:DNA, Bacterial / Q000737:chemistry / Q000302:isolation & purification; D004591:Electrophoresis, Polyacrylamide Gel / Q000662:veterinary; D007315:Insemination, Artificial / Q000662:veterinary; D007919:Leptospira / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D007921:Leptospira interrogans / Q000737:chemistry / Q000145:classification / Q000235:genetics*; D007922:Leptospirosis / Q000175:diagnosis / Q000382:microbiology / Q000517:prevention & control / Q000662:veterinary*; D008297:Male; D016133:Polymerase Chain Reaction / Q000662:veterinary; D012150:Polymorphism, Restriction Fragment Length; D012661:Semen / Q000382:microbiology*
chemical_list: D017931:DNA Primers; D004269:DNA, Bacterial