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• W1542164221 abstract "Neosporosis is a major cause of abortion in dairy and cattle worldwide. The global objective of this study was determined the frequency of infection in calves and heifers from dairy herds of Lavras, MG. For than two studies were carried, the first one was to establish the frequency of infection and to analysis risk factors to Neospora caninum in calves and heifers from 18 dairy herds of Lavras, Minas Gerais State. Five hundred and thirty and four samples were screened by indirect immunofluorescence antibody test (IFAT) using cut off dilution of 1:200. The dairy herds were classified in two groups: group A) herds produced more than 1,000 lid of milk/day and group B) herds produced less than 1,000 lid of milk/day. The herd prevalence was 100% (18/18). The overall frequency of N. caninum infection was 46.25% (247/534) such as 43.66% (93/213) and 47.97% (154/321) in group A and B, respectively. There was no statistically significant difference between the groups (p>0.05). There was no significant association between risk factor and serology for N. caninum (p>0.05).The second one, was to establish the frequency of transplacental transmission and to analysis reproductive factors to N. caninum in calves and heifers from two dairy herds of Minas Gerais State. Three hundred and sixty and nine samples were screened by indirect immunofluorescence antibody test (IFAT) using cut off dilution of 1:200. The frequency of N. caninum infection was 39, 4 % (93/236) and 31, 37 % (32/102) in farms Ponte Alta and Pinheiros, respectively. Transplacental transmission was 29% in Ponte Alta and 9 % in Pinheiros. The global of transplacental transmission were 23, 72%. In both farms was determined post-natal transmission. There was no significant association between milk production, reproductive factors and serology for N. caninum (p>0.05).The results indicate that the infection for N. caninum appears to be widespread between calves and heifers of dairy herds in micro region of the Lavras, south of Minas Gerais State, and even so post-natal transmission does not the major route of transmission, this route was identified on two farms and this route was important to do the control for this illness in this dairy herds.%%%%A neosporose bovina A uma doenAa parasitAria causada pelo protozoArio Neospora caninum, atualmente uma das principais causas de aborto em bovinos leiteiros e de corte em todo o mundo. O objetivo principal deste estudo foi determinar a freqAAncia de infecAAo por N. caninum em bezerras e novilhas de rebanhos leiteiros da microrregiAo de Lavras e relacionar os fatores de risco ao status sorolAgico dos animais. Para tanto foram realizados dois estudos, o primeiro teve como objetivo determinar a freqAAncia de anticorpos anti-N. caninum e os fatores de risco associados a soropositividade, em 18 rebanhos leiteiros da microrregiAo de Lavras, sul de Minas Gerais. Para isso, 534 amostras de soros, coletadas de bezerras (maiores de trAs meses idade) e novilhas (atA 24 meses de idade), foram divididas em dois grupos de acordo com a produAAo…" @default.
• W1542164221 created "2016-06-24" @default.
• W1542164221 creator A5018332737 @default.
• W1542164221 date "2008-01-01" @default.
• W1542164221 modified "2023-09-23" @default.
• W1542164221 title "Aspectos Epidemiológicos da Neosporose Bovina em Rebanhos Leiteiros de Minas Gerais." @default.
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