Correlación entre agentes etiológicos causantes de infecciones plancentarias en yeguas y la presentación de osteocondrosis en su progenie

Abstract

The study aims to assess the presentation of placentitis of infectious origin in English thoroughbred mares (PSI) and its relation to the presentation of osteochondrosis (osteochondritis dissecans and / or subchondral bone cysts) PSI foals born to mothers who had placentitis ( risk factor) of infectious origin (Nocardia spp, Streptococcus equi equi, Streptococcus equi zooepidemicus, Escherichia coli, Homgos, Leptospira spp etc.) during their pregnancy.It is noteworthy that the placentitis of infectious origin have not been so far evaluated as causes of osteochondrosis, because of this study will make an assessment of placentitis as one of the risk factors in the presentation of osteochondrosis in foals born to mothers who had placental infections during pregnancy.An epidemiological, longitudinal and retrospective case control study was conducted to evaluate the frequency of occurrence of osteochondrosis in Thoroughbred foals born to mothers who had placentitis by infection during pregnancy. Using for that purpose records cases at Hagyard Equine Medical Institute Hospital, Lexington, Kentucky, USA that included a study period from 2004 to 2010.The information was obtained directly from records, for further evaluation. To make the determination of placentitis as a risk factor, each of the positive placentitis was considered some microorganism as exposed population.The inclusion criteria of the animals in this study were the race, positive pregnancy diagnosis, positive diagnosis of infectious origin placentitis and pregnancy carried to term with the birth of foals that survived in order to allow the assessment of osteochondrosis in their offspring .This inclusion criteria previously described for convenience for the study and a sample of 397 English thoroughbred mares with placentitis of infectious origin with pregnancy carried to term and viable foals with clinical records of 0-18 months are considered. The placentas were sent to the laboratory for diagnosis of the University of Kentucky (Livestock Disease Diagnostic Center University of Kentucky, Lexington, Kentucky, USA)...