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Year 1998 - Volume 18, Number 3
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Etiology of intramammary infections in primiparous cows at postparturition, 18(3/4):115-118
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ABSTRACT.- Pardo P.E., Mettifogo E., Miiller E.E., Nascimento E.R., Buzinhani M., Yamaguti M. & Freitas J.C. 1998. [Etiology of intramammary infections in primiparous cows at postparturition.] Etiologia das infecções intramamárias em vacas primíparas no período pósparto. Pesquisa Veterinária Brasileira 18(3/4):115-118. Depto Medicina Veterinária Preventiva/CCA, Universidade Estadual de Londrina, Campus Universitário, Cx. Postal 6001, Londrina, PR 86051-990, Brazil.
A total of 664 foremilk samples from 83 Holstein cows were cultured. Quarter samples were collected at parturition and 7 days post the first parturition. From 664 milk samples examined, 488 (73.50%) were bacteriologically negative and 176 (26.50%) were positive. A high incidence (20.48%) of clinical mastitis was observed. The most frequently encountered isolates were coagulase negative staphylococci (64.20%), coagulase positive staphylococci (8.52%), streptococci (7.96%), Actinomyces pyogenes (4.55%), Mycoplasma bovigenitalium (3.40%) and Escherichia coli (2.84%). The frequency of mastitis pathogen isolation was highest at parturition (17.62%) and decreased markedly during the first week (8.88%). |
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