2004
DOI: 10.5433/1679-0359.2001v22n2p155
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Soroprevalência de Anaplasma marginale em bovinos leiteiros e estudos sobre a dinâmica da infecção natural em bezerros holandeses no Sul do Brasil

Abstract: Sera of 708 animals (cows, heifers and calves) from 13 dairy herds in the Londrina region of Paraná, Brazil, were tested for antibodies to Anaplasma marginale by a competitive ELISA assay (cELISA). Ten 2 to 20 days old Holstein calves, from one of the 13 herds studied, were monitored during one year. Blood samples from each calf were collected monthly and tick burden counting was performed every fortnight. Percentage of infected erythrocytes was established by Giemsa-stained smears, and sera samples were exami… Show more

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Cited by 4 publications
(6 citation statements)
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“…In the state of Bahia, northeastern Brazilian territory, a seropositivity of 94.8% was reported in cattle (BARROS et al, 2005). In other municipalities in the State of Paraná, antibodies anti-A.marginale were observed in 92.94% of cattle from Londrina (ANDRADE et al, 2001), 76.1% in Umuarama (YOSHIHARA et al, 2003) and 58.74% in Ponta Grossa, Guarapuava and Laranjeiras do Sul cities (MARANA et al, 2009).…”
Section: Resultsmentioning
confidence: 98%
“…In the state of Bahia, northeastern Brazilian territory, a seropositivity of 94.8% was reported in cattle (BARROS et al, 2005). In other municipalities in the State of Paraná, antibodies anti-A.marginale were observed in 92.94% of cattle from Londrina (ANDRADE et al, 2001), 76.1% in Umuarama (YOSHIHARA et al, 2003) and 58.74% in Ponta Grossa, Guarapuava and Laranjeiras do Sul cities (MARANA et al, 2009).…”
Section: Resultsmentioning
confidence: 98%
“…Esse valor foi menor que os 92,94% de Andrade et al (2001), dos 87,5% de Vidotto et al (1998) (VIDOTTO et al, 1998). A taxa de soroprevalência de 58,74% encontrada mostrou-se inferior àquelas encontradas em outras regiões do Brasil, demonstrando que, à medida que se avança para o sul do país, as condições climáticas vão se alterando e a prevalência da anaplasmose diminuindo.…”
Section: Resultsunclassified
“…Por outro lado, Vidotto et al (1998) analisaram animais de raça leiteira (Bos taurus) e animais cruzados (Bos taurus/Bos indicus) e encontraram taxa de soropositividade de 87,56%; Andrade et al (2001) examinaram somente raças leiteiras (Bos taurus), obtendo 92,94% de soropositivos; e Yoshihara et al (2003) encontraram um valor menor (76,88%), estudando bovinos de corte da raça Nelore (Bos indicus). Fatores que devem ter influenciado essas diferenças são as raças e variações climáticas entre as regiões Norte e Central que podem interferir na maior ou menor população de vetores.…”
Section: Resultsunclassified
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“…Na região de Londrina, Vidotto et al (1998) encontraram 87,56% de animais positivos em rebanhos mistos; Andrade et al (2001), 92,94% em rebanhos leiteiros; Yoshihara et al (2003) …”
Section: Introductionunclassified