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Influence of Seroreactivity to L eptospira and Reproductive Failures in Recipient Mares of Equine Embryo Transfer Programmes
Author(s) -
Pinna A,
Martins G,
Souza G,
Lilenbaum W
Publication year - 2013
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/rda.12166
Subject(s) - abortion , pregnancy , embryo , andrology , fetal death , embryo transfer , medicine , immunology , herd , biology , fetus , gynecology , veterinary medicine , genetics , microbiology and biotechnology
Contents The aim of this study was to demonstrate that seroreactivity against L eptospira is significantly associated to the reproductive efficiency of recipient mares of an embryo transfer ( ET ) programme. A serosurvey was conducted from A ugust 2007 to M arch 2009 in five herds from R io de J aneiro, B razil, with high rates of reproductive failure, as early embryonic death (>12%), abortion (>12%) and perinatal death. Detailed information about the losses was obtained from practitioner. A total of 338 recipient mares were tested by microscopic agglutination test, and 226 (66.9%) were seroreactive, mainly against serovars B ratislava and C openhageni. Seroreactivity could be associated to reproductive failure (p < 0.001), and it was demonstrated that a seroreactive mare is 1.8 times more likely (relative risk – RR ) to present reproductive failure than a seronegative one, particularly in relation to early embryonic death (p < 0.0001; RR 8.4) but also to abortions (p < 0.0001; RR 3.5), and to perinatal death (p < 0.05; RR 7.3). Therefore, seroreactivity to L eptospira is associated to reproductive failure in all phases of pregnancy in recipient mares, impairing equine ET programmes.