Open AccessDuração das infecções naturais da glândula mamaria por estafilococos coagulase negativos em vacas primíparas
Author(s) -
Luís Carlos Vianna,
Ernst Eckehardt Müller,
Júlio César de Freitas,
Lucienne Garcia PrettoGiordano,
R Salvador,
Juliana Alves Dias
Publication year - 2000
Publication title -
semina. ciências agrárias
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.268
H-Index - 25
eISSN - 1679-0359
pISSN - 1676-546X
DOI - 10.5433/1679-0359.2000v21n1p9
Subject(s) - biology , microbiology and biotechnology
One hundred fourteen primiparous cows wre analized. They wre from nine milk properties of the west region of São Paulo sate. On the seventh day of lactation. 42 (36.84%) showed infections in 69 (41.07%) quarters. The main aetiologic agents of the intramammary infections on the seventh day were coagulase-negative staphylococci (CMS) with 53,62%, followed by Corynebacterium spp with 26r08% and coagulase-positive staphylococci (CPS), with 11,59% of the positive samples. From the seventh day of lactation on there was a decreasing tendency of the infections by SCN in the previously tnfected mammary quarter (r = 0,63, r2= 0,4) and simultaneously there were new infections by other pathogen in these quarter. On the 150th day, the CNS were not isolated. There was not significant difference (P3 0.05) about the number of infections by udder quarter There was significant difference (P£0rO1) between the average of the somatic cell count (SCC) of the milk samples. It. comes from the infected quarters by SCN (397 x 103/ mL) and of negative quarters (104 x 103/mL).