1995
DOI: 10.1590/s0103-84781995000300019
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Disponibilidade de larvas infectantes de nematódeos gastrintestinais parasitas de ovinos deslanados no semi-ârido pernambucano

Abstract: A cada período médio de 30 dias (25 a 56 dias) compreendidos entre 08 de janeiro de 1988 e 11 de maio de 1990, dois ovinos deslanados, machos, com idade entre três a seis meses de idade, livres de vermes, eram colocados para pastejar juntamente com um rebanho naturalmente infectado. Após o período de pastejo, os animais permaneciam estabulados por 14-21 dias quando eram submetidos à necropsia para coleta, contagem e identificação dos nematódeos adquiridos. Haemonchus contortus foi o nematódeo mais prevalente (… Show more

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Cited by 8 publications
(8 citation statements)
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“…This season occurs especially during warm moist summer months, with a reduction in the prevalence of H. contortus during cold winter months (SANTIAGO et al, 1976;RAMOS et al, 2004). In contrast, in regions with year round high temperatures, the limiting factor for H. contortus transmission is the lack of moisture during prolonged periods of drought, such as those observed in Brazil's semiarid northeast (CHARLES, 1995;SOUZA et al, 2013). This seasonal trend in the prevalence and/ or intensity of infection was not observed in our experimental conditions, in which H. contortus transmission, with high worm burdens, occurred year round.…”
Section: Discussionmentioning
confidence: 99%
“…This season occurs especially during warm moist summer months, with a reduction in the prevalence of H. contortus during cold winter months (SANTIAGO et al, 1976;RAMOS et al, 2004). In contrast, in regions with year round high temperatures, the limiting factor for H. contortus transmission is the lack of moisture during prolonged periods of drought, such as those observed in Brazil's semiarid northeast (CHARLES, 1995;SOUZA et al, 2013). This seasonal trend in the prevalence and/ or intensity of infection was not observed in our experimental conditions, in which H. contortus transmission, with high worm burdens, occurred year round.…”
Section: Discussionmentioning
confidence: 99%
“…In Africa, Ndamukong and Ngone (1996), verified that no larvae were recovered from eggs on pasture during dry the season and concluded that humidity was the most important climatic factor influencing the survival and development of Haemonchus and Trichostrongylus larvae on pasture. Infective larvae of gastrointestinal nematodes cannot survive for long on pasture when environmental conditions are not favourable, especially under low relative humidity (Charles, 1995;Tembely, 1998). In addition, as animals age, they become more resistant to nematodes (Colditz et al, 1996).…”
Section: Discussionmentioning
confidence: 99%
“…O tratamento frequente do rebanho ovino com anti-helmínticos tem sido a única medida de controle das helmintoses gastrintestinais adotadas pelos criadores (Charles 1995). Esses produtos apresentam diferentes mecanismos de ação.…”
Section: Introductionunclassified