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	Provedor de dados Ciência Rural (2) Autor Franti,Charles (2) Riemann,Hans (2) Rojas,José Alfonso Barajas- (2) Palavra-chave ELISA (2) Cattie diseases (1) Infectious diseases (1) Sentinels (1) Seroconversion (1) Serological screening (1) Young (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 1993 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última SEROLOGICAL SCREENING FOR INFECTIOUS CATTLE DISEASES: II. ASSOCIATION BETWEEN PREVALENCE AND LEVEL OF ELISA RESPONSE Ciência Rural Rojas,José Alfonso Barajas-; Riemann,Hans; Franti,Charles. A herd of cattle (Holstein-Zebu crosses) was screened every two months by ELISA during a period of two years for IgG antibodies against 19 infectious disease agents. Two hundred and ninety five sera were collected from 157 young animals (0-4 months of age), 1037 sera from 292 developing animals (4-36 months of age) and 1468 sera from 259 producing animals (> 36 months of age). The results indicate that the difference in ELISA between positive and negative tests is associated with the overall prevalence of positive tests. When the prevalence of positive tests is low the difference between positive and negative tests is greater than when the prevalence is intermediate or high. This means that ELISA, presumably other serological tests for IgG antibodies,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Serological screening; Cattie diseases; ELISA. Ano: 1993 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781993000200014 SEROLOGICAL SCREENING FOR INFECTOUS CATTLE DISEASES: III. CHOICE OF SENTINEL ANIMALS Ciência Rural Rojas,José Alfonso Barajas-; Riemann,Hans; Franti,Charles. A herd of Cattle (Holstein-Zebu crosses) was screened bimonthly for two years by ELISA for IgG antibodies to infectious disease agents. The herd was composed of 3 age groups: Young animals ( < 4 months of age), developing animals (4-36 months of age) and producing animals ( &gt; 36 months of age). Ali young animals received colostrum within two hours after birth. The overall consistency of ELISA results, i. e agreement between two consecutive tests was about the same for the three age groups and was lowest for infections of intermediate prevalence (40-50%). The interpretation of changes in seroprevalence is most straight forward for young animals. Young animals positive at their first test reflect the immune status of their mothers while young... Tipo: Info:eu-repo/semantics/article Palavras-chave: ELISA; Seroconversion; Young; Sentinels; Infectious diseases. Ano: 1993 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781993000200015 Registros recuperados: 2 Primeira ... 1 ... Última

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