Chronopart de la truie en élevage : effet de la durée de mise bas sur quelques paramètres physiologiques et biochimiques

Résumé fourni par la source

Long farrowing durations have negative impact on perinatal mortality and subsequent piglet survival. The aim of this work is to monitor the evolution of different physio-metabolic parameters before and during parturition in order to clarify the mechanisms involved in complicated farrowings. The experiment is performed in 4 LWxLR herds and involves 28 spontaneous farrowings (no injections, nor assistance) on young nulliparous and primiparous sows. Sows are equipped with a jugular catheter and repeated blood sampling is performed before (once a day before 1st meal, on day-3 to day 0) and during farrowing (once/hour). The following parameters are analysed : oestradiol, progesterone, hematocrit, hemoglobin, total proteins, glucose, NEFA, bicarbonate, lactate, CK, calcium and magnesium. According to farrowing kinetics and occurence of stillborns, sows are allocated to two groups of normal (N=14) vs complicated (N=14) parturitions. Farrowing durations (172 vs 297 mn) and the rate of piglets born in 3 hours (93 vs 69 %) are different in the two groups. Differences between groups are seen for calcium, magnesium, CK, total protein and progesterone. Significant correlations are found between parturition duration and some parameters measured before farrowing or at the birth of the first piglet (calcium, magnesium, total protein, progesterone, oestradiol). Theses results suggest possible differences in uterine functioning, determined in late pregnancy.

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