ÉTUDE DES CARACTÈRES LAITIERS ET DE L’ÉTAT SANITAIRE MAMMAIRE CHEZ DES BREBIS SICILO-SARDE ÉLEVÉES DANS LA RÉGION DE BÉJA (TUNISIE)

Abstract

This work examines the evaluation of both the quantitative and qualitative dairy performance of Sicilo-Sarde ewes from dairy controls, and udder health from direct cellular screening by Individual Cell Count (CCI) and indirect testing by the Californian Mastitis Test (CMT). This study focused on a sample of 48 sheep, representing about 15% of the total number of animals, in the UCPA Gnadil in the Beja region of northern Tunisia. Ewes were milked twice daily by a mechanical pot machine.

The average of milk yield during a 175-day milking period was 133 ± 43 l after a lactation phase that lasted an average of 56 days (± 6.6). At the end of lactation, exactly at the 25th and 29th weeks of lactation, the qualitative analyzes of the milk essentially revealed that the average values of the fat, protein, lactose and total dry extract were respectively 8, 5, 6.0, 4.6 and 19.9%. The results of the CMT test recorded the occurrence of some cases of subclinical mastitis of the order of 3%, while the average CCI increased from 463400 cells / ml to reach 788100 cells / ml at the end of lactation.