Despite a large body of safety data, concern exists that porcine zonae pellucidae (PZP) immunocontraception--used to manage wild horse populations--may cause out-of-season births with resulting foal mortality. Our study at Assateague, Maryland indicated the effects of immunocontraception on season of birth and foal survival between 1990 and 2002 on wild horses from Assateague Island. Among 91 m...

The data and an analysis of the statistical summaries from the 'Return of Mares' of the General Stud Book of The Jockey Club of Southern Africa from 1975-1999 are presented. The total number of mares covered per season ranged from 7393 (1992) to 5180 (1995). The total living produce in the period surveyed was 95 317 foals. The categories of data examined include: the total number of mares cover...

Equineherpesvirustypes 2 and 5 (EHV-2andEHV-5)have a rather unclearpathogenicity and distribution within the equid population. In order to gain more information on the prevalence of these two viruses, type-specific PCR assays were developed to detect viral DNA in nasal specimens and in peripheral blood leukocytes (PBLs) of adult horses and foals from various regions of Europe, i.e. Sweden, Hung...

Foals with combined immunodeficiency had normal levels of purine salvage pathway enzymes, including adenosine deaminase, nucleoside phosphorylase, and xanthine oxidase.

While the majority of scientific evidence indicates that foals are immunocompetent at birth, vaccination is complicated by interference by passively transferred maternal antibody. In addition, there is considerable clinical evidence of poor resistance to disease or response to primary vaccinations in the first year of life. Against this background it is critical to identify and develop potent v...

BACKGROUND The objective of this study was to evaluate the level of roundworm infection in working horses slaughtered for meat. In these horses anthelmintics had not been used. MATERIAL AND METHODS Roundworms were collected post-mortem from small intestines of 83 horses. RESULTS The mean prevalence of roundworm infection was 12% and intensity--46.7 specimens per horse. Infection was found o...

Maternal antibodies to Sarcocystis neurona are passively transferred from a seropositive mare to her foal in colostrum and can remain detectable by Western blot for up to 9 months of age, although most foals are seronegative by 6 months of age. Antibodies are detectable in CSF of neonatal foals from several days to age up to at least 3 months of age. Author’s address: Dept of Large Animal Clini...

REASONS FOR PERFORMING STUDY There are limited reports on the efficacy of functional orthodontic correction of overjet or overbite in foals. OBJECTIVES To report the outcome of using orthodontic tension bands in combination with an inclined plane biteplate in the treatment of overjet, with or without concurrent overbite, rates of correction of these 2 malocclusions and associated complication...