Abstract
The present study aimed to investigate the prevalence of constipation and its influence on farrowing duration and the evidence of post-parturient disorders in tropical sows and to evaluate the efficacy of a laxative supplementation during gestation and around farrowing on the incidence of constipation. Two experiments were performed in a commercial swine herd in Thailand. In experiment 1, the prevalence of constipation was determined in 96 gestating sows. Subsequently, 62 of them (64.6%), with a severe to moderate degree of constipation, received 20ml of a laxative for 3days during gestation. In experiment 2, constipation score was determined in sows before, during, and after farrowing. A total of 98 sows were randomly allocated to one of two groups: the treatment group (n = 48) received 20ml of a laxative for 3days before farrowing, and the control group (n = 50) did not receive any laxative. Rectal temperature, appetite score, incidence of postpartum dysgalactia syndrome (PDS), and vaginal discharge score was determined for 4days. In experiment 1, supplementation of laxative reduced the proportion of sows with moderate to severe constipation (P < 0.05). In experiment 2, sows with moderate to very severe constipation had a 28-min longer duration of farrowing than sows with normal faeces. Constipation in sows on the day of farrowing resulted in reduced appetite on day 1 postpartum (P = 0.008). The incidence of sows with fever on day 1 postpartum was two times higher in sows with constipation than in sows with normal faeces (36.2 and 16.7%, respectively; P = 0.041).
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