Resumen

ZAMBRANO, William José  y  DE PINHO MARQUES JR, Antonio. Mammary gland evaluation and milk chemical composition in crossbreed milking primiparas cows before calving, up to the fifth month of lactation. Rev. Cient. (Maracaibo) [online]. 2008, vol.18, n.5, pp.562-569. ISSN 0798-2259.

To evaluate the mammary gland and the milk chemical composition in crossbreed milking primiparus cows and their interrelationship with clinical problems, 10 crossbreed primiparus cows (Girolando) from one farm, located in Sabinópolis Municipality, Minas Gerais State, Brasil were used to perform clinic evaluation of the mammary gland, California Mastitis Test (CMT), Somatic Cell Count (SCC) and determination of the concentration of the milk components, on days 17; 37; 54; 78; 110; 130 and 153 after calving. The clinical evaluation showed low percentage of injury in the teats, and the CMT was negative in 77.86% of the quarters. The mean values (±SD) for SCC were 167,857.1 (± 585,859.5) and for the milk components fat, protein, lactose and total solid 3.17 (± 0.74); 3.05 (± 0.29); 4.65 (±0.22) and 10.38 (± 0.80)%, respectively, alike values to reported in the literature. In conclusion, the results showed to be a good indicator of the milk quality and satisfactory to follow the milk chemical composition in crossbreed milking primiparus cows, which were different from day 17 to day 153 of lactation.

Palabras clave : Vaca primípara; mestiza lechera; CMT; CCS; componentes de la leche; Crossbreed milking; primiparus cows; CMT; CCS; milk components.