Aetiology of the intramammary infections and somatic cell counts in primiparae cows/ <br> Etiologia das infecções intramamárias e contagem de células somáticas em vacas primíparas
Two hundred primiparae cows from 12 milk properties in the west region of the São Paulo state and north region of Paraná state, were studied. About the animals studied, 86 (43%), showed infections in 140 (17,56%) quarters on the seventh day after parturition. On the first 150 days of lactation, 2372...
Main Authors: | , , , , , |
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Format: | Article |
Language: | English |
Published: |
Universidade Estadual de Londrina
2002-05-01
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Series: | Semina: Ciências Agrárias |
Subjects: | |
Online Access: | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/2059 |
Summary: | Two hundred primiparae cows from 12 milk properties in the west region of the São Paulo state and north region of Paraná state, were studied. About the animals studied, 86 (43%), showed infections in 140 (17,56%) quarters on the seventh day after parturition. On the first 150 days of lactation, 2372 milk samples were achived. About them, 504 (21,24%) were positive according to the bacteriological test. From the 14th day of lactations on, the microorganisms isolated more often, were the coagulase negative staphilococci (CNS) in 213 (13,52%) samples, Corynebacterium spp in 97 (6,15%) and coagulase positive staphylococci (CPS) in 32 (2,03%). In the same period, the average of the somatic cell counts (SCC) in the infected quarters, were 469 x 103/ml of milk and in the negative quarters, of 79 x 103/ml of milk. In the infected quarters by SCP, Streptococcus spp, CNS and Corynebacterium spp, the average of the SCC, were of 1246 x 103, 1094 x 103, 372 x 103 and 308 x 103/ml of milk, respectively. The SCC when comparated to the opposite non afected quarters, showed significant difference (P < 0,05).<p><p>Foram estudados 200 vacas primíparas, provenientes de 12 propriedades leiteiras localizadas no oeste do Estado de São Paulo e norte do Estado do Paraná. Dos animais estudados, 86 (43%) apresentaram infecção em 140 (17,56%) quartos, no 7º dia pós-parto. Nos primeiros 150 dias de lactação, foram colhidas 2372 amostras de leite. Dessas, 504 (21,24%) foram positivas no exame bacteriológico. A partir do 14º dia de lactação, os microrganismos isolados, com maior freqüência, foram os estafilococos coagulase negativos (ECN), em 213 (13,52%) amostras, Corynebacterium spp, em 97 (6,15%), e estafilococos coagulase positivos (ECP), em 32 (2,03%). No mesmo período, as médias das contagens de células somáticas (CCS), nos quartos infectados, foi de 469 x 103/ml de leite e, nos quartos negativos, de 79 x 103/ml de leite. Nos quartos infectados por ECP, Streptococcus spp, ECN e Corynebacterium spp, as médias das CCS foram de 1246 x 103, 1094 x 103 , 372 x 103 e 308 x 103/ml de leite, respectivamente. As CCS quando comparadas às dos quartos opostos não infectados, apresentaram diferença significativa (P < 0,05). |
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ISSN: | 1676-546X 1679-0359 |