The Effect of Mycobacterium Cell Wall Fraction on Histologic, Immunologic, and Clinical Parameters of Postpartum Involution in the Mare.

Journal of Equine Veterinary Science
Carleigh E FedorkaMats H T Troedsson

Abstract

Maintaining yearly foal production is important for the economic success of the broodmare, and this requires breeding to occur as quickly postpartum as possible. The initial postpartum estrus occurs within 5-20 days postpartum, whereas the uterus is still undergoing repair from tissue alterations during pregnancy and parturition, a process known as involution. Attempts have been made to hasten this process, but with minimal success. Mycobacterium cell wall fraction (MCWF) is an immunomodulator that has been shown to reduce bacterial growth and alter aspects of the immune response to breeding, but it is unknown if MCWF hastens the process of involution. Therefore, the objectives of this study were to (1) investigate the effect of MCWF on tissue remodeling, (2) assess the effect of MCWF on the local immune system of the uterus, and (3) determine the optimal treatment interval needed for these processes to occur. We hypothesize that repeated treatments of MCWF postpartum will hasten the process of involution. To study this, 16 pregnant mares of mixed breeds were evaluated postpartum. Control mares (n = 4) received 1.5 mL lactated Ringer's solution intravenously on Day 1 (Day 0 = day of parturition) postpartum and again on Day 7, w...Continue Reading

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