European Journal of Scientific Research - EuroJournals
European Journal of Scientific Research - EuroJournals
European Journal of Scientific Research - EuroJournals
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<strong>European</strong> <strong>Journal</strong> <strong>of</strong> <strong>Scientific</strong> <strong>Research</strong><br />
ISSN 1450-216X Vol.20 No.2 (2008), pp.362-373<br />
© Euro<strong>Journal</strong>s Publishing, Inc. 2008<br />
http://www.eurojournals.com/ejsr.htm<br />
Éfficacité Comparée de Deux Méthodes de Diagnostic Précoce<br />
de Gravidité Chez la Brebis Ouled Djellal<br />
Abdelaziz Benyounes<br />
Institut d’Agronomie, Centre Universitaire d’El Taref – Algérie<br />
route zitouna El Taref 36000 Algérie<br />
E-mail: benyounesaziz@yahoo.fr<br />
Tel: 00 213 662 28 43 39<br />
Farida Lamrani<br />
Institut Technique des Élevages, Baba Ali, Alger – Algérie<br />
Jose Sulon<br />
Laboratoire de Physiologie de la Reproduction, Faculté de Médecine Vétérinaire<br />
Université de Liège – Belgique<br />
Ali Tahar<br />
Département de Biologie, Faculté des Sciences, Université de Annaba – Algérie<br />
Jean-François Beckers<br />
Laboratoire de Physiologie de la Reproduction, Faculté de Médecine Vétérinaire<br />
Université de Liège – Belgique<br />
Abstract<br />
The diagnosis <strong>of</strong> pregnancy is a fundamental importance in sheep breeding. The<br />
objective <strong>of</strong> this work is to evaluate the efficiency <strong>of</strong> progesterone (P4) and pregnancy<br />
associated glycoprotein (PAG) for precocity, sensitivity, specificity and reliability;<br />
confronted with the reality <strong>of</strong> the events which could occur on the females since the breed<br />
until the end <strong>of</strong> pregnancy, followed <strong>of</strong> the precision <strong>of</strong> their possible limits. The test<br />
proceeded in the East area Algeria - Guelma- on 25 ewes Ouled Djellal. The oestrus is<br />
synchronized by hormonal treatments and with natural breeding. The blood tests are<br />
weekly, <strong>of</strong> the 17 to the 49 days post-breed. The plasmatic concentration <strong>of</strong> progesterone is<br />
determined by radioimmunoassay (RIA) according to the direct method and the PAG by<br />
RIA semihomologous, using 125 I on bovine PAG as tracer and a PAG antibody ovine n°<br />
780 diluted to 1/40.000. The adopted discriminatory threshold levels are P4 ≥1 ng/ml and<br />
PAG ≥1.2 ng/ml. The PAG showed an efficiency raised for reliability and the precision<br />
from the 28 days <strong>of</strong> pregnancy. The two methods are identically precise in the<br />
determination <strong>of</strong> the embryonic losses. Their announcement is on the other hand earlier for<br />
the PAG and their combined use in practice for the diagnosis <strong>of</strong> pregnancy is useless. This<br />
complementarity’s interesting in the identification <strong>of</strong> the embryonic losses and the ewes<br />
declared wrongly empty by progesterone. The insufficiency <strong>of</strong> progesterone in relation to<br />
the adopted threshold is not inevitably synonymous <strong>of</strong> empty females.