Micoplasmose em bovinos de aptidão leiteira: fatores predisponentes para a ocorrência e manifestação da síndrome vulvovaginite granular

• Autor(a) principal: NASCIMENTO-ROCHA, Josefa Moreira do
• Data de Publicação: 2009
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/001300000cbtv
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/1198
• topic: Bovino, ordenha, reprodução, Ureaplasma diversum; Bovine, milking, reproduction, Ureaplasma diversum; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA::SAUDE ANIMAL (PROGRAMAS SANITARIOS)

The reduction of reproductive rates is measured by the reduction in the number of calves born that immediately reflected in the reduction of milk production and profitability of commercial property. The effect is the increased administrative costs of maintenance with dry cows, higher rates of rejection and a higher number of doses of semen for conception. Parameters related to the level of hygiene of the udder and the milking system and environmental criteria as the overall control on the suction pressure of the milking, the ventilation system for livestock and hygiene in the milking parlor, contribute to the satisfaction of the control of pathogens transmissible among livestock. Study on monitoring the herd showed that the time of calving interval increases significantly in the first lactation cows with vaginitis, but the injury was not associated with cases of voluntary discharge. Research on the likelihood of introduction of infectious agents into herds free of the disease found that the significant risk factors for this spread were related to the return of animals that were removed for marketing, proximity between pastures of different properties and especially the clothing of a veterinarian or visitors. When analyzing the risk factors for the occurrence of a disease the causative factors are considered. Regression analysis to identify risk factors usually consider the multifactorial effects and outcome. The identification of the risk factor is to compare the pattern of distribution of the dependent variables between the levels of occurrence of the disease. Infections with mycoplasma (Mollicutes) in farm animals, have historical importance and continuing today interfering with livestock productivity. The M. Canadense is still little known in the pathological processes of reproduction. The M. bovis is highly adapted to cattle, however has been isolated in samples of buffalo, small ruminants and humans. The M. bovigenitalium was related to diseases of the reproductive system for more than three decades and was considered as the primary agent of vaginitis. The granular vulvitis sponsored by the U. diversum was demonstrated both in animals vaccinated as in unvaccinated. The agent has to interact with cellular factors, the ability to bind to the surface membrane of the host and even biological mechanisms to escape immune response submitted by host.Young animals and adults are susceptible. Transmission is by the introduction of carrier animals, semen and contact with infected genital secretions of infected animals