A series of field studies using strain TC-83 attenuated Venezuelan equine encephalomyelitis vaccine in horses was made to determine the rate of seroconversions, the postvaccination viremia, and the possibility of adverse reactions to the vaccine. The rate of seroconversions varied from 50% in one study to 91 and 100% in two others. The highest level of viremia measured was 7 x 10(3) to 8 x 10(3...

endometritis is one of the major causes of infertility in mares. the present study was conducted to evaluate intrauterine infusion of eucalyptus globulus oil as treatment for mares with experimentally induced endometritis. mares (n=8) were synchronized using two injections of pgf2α (10 mg) 14 days apart. all mares were inoculated with a live culture of 5 × 106 cfu s. zooepidemicus in the dioest...

Ovariectomized mares and mares with inactive ovaries may show signs of estrus. The reason behind this phenomenon is not clear; however, steroid hormones of adrenal origin have been suggested. Moreover, aberrant adrenal hormone production has been implied as a reason why some intact mares may change behavior. In the present study, the effect of ACTH on plasma levels of cortisol, progesterone, an...

Mare reproductive loss syndrome (MRLS) describes a condition of equine early-term and late-term fetal losses in which the etiology has not been fully characterized. Involvement of Eastern tent caterpillars (ETC) has been highly considered because oral administration of ETC rapidly induces abortion in pregnant mares. Pathologic lesions observed in placental and fetal tissues of horses with chara...