RESUMO
Haemonchus longistipes specimens were collected from experimentally infected Sudanese goats and camels for morphological studies. The specimens from goats were much smaller than those from camels, but their infectivity to camels was not affected by their passage in goats. Goats inhabiting the same areas as camels in the Sudan were found to be naturally infected with H. longistipes, but sheep were not and were resistant to experimental infection.
Assuntos
Cabras/parasitologia , Hemoncose/veterinária , Tricostrongiloidíase/veterinária , Animais , Camelus/parasitologia , Feminino , Hemoncose/parasitologia , Haemonchus/anatomia & histologia , Haemonchus/patogenicidade , Masculino , SudãoRESUMO
Camel haemonchosis is prevalent in the Sudan, especially during the rainy season, with a decrease in prevalence in the dry season possibly due to delayed maturation of the worms. The naturally occurring disease in Sudanese camels is characterized by emaciation, anaemia, oedema of the lower parts of the limbs, eosinophilia, hypoproteinaemia, hypoalbuminaemia, hyperglobulinaemia and eosinophilia, as well as elevated blood urea concentrations.
Assuntos
Camelus , Hemoncose/veterinária , Tricostrongiloidíase/veterinária , Doenças dos Animais/epidemiologia , Doenças dos Animais/fisiopatologia , Animais , Glicemia/análise , Proteínas Sanguíneas/análise , Feminino , Hemoncose/sangue , Hemoncose/epidemiologia , Hemoncose/fisiopatologia , Masculino , Sudão , Ureia/sangueRESUMO
The pathogenesis and clinical signs of Haemonchus longistipes infection were studied in four experimentally infected camels two of which were adults and the other two were young. In the former animals, an acute infection developed, characterized by mucoid diarrhoea, anorexia, anaemia, loss of body weight, oedema of the lower parts of the limbs, general malaise and death at 8-10 weeks post-infection. In the two younger camels, a less dramatic disease was encountered with less severe symptoms and no oedema, but also terminating fatally at 19-20 weeks post-infection. Parasitological, haematological and biochemical parameters were determined during the course of the infection and were mostly comparable with those usually encountered in haemonchosis of other animals.
Assuntos
Camelus/parasitologia , Hemoncose/veterinária , Tricostrongiloidíase/veterinária , Animais , Proteínas Sanguíneas/análise , Diarreia/veterinária , Duodeno/parasitologia , Contagem de Eritrócitos/veterinária , Feminino , Hemoncose/sangue , Hemoncose/parasitologia , Haemonchus/anatomia & histologia , Contagem de Leucócitos/veterinária , Masculino , Minerais/sangue , Contagem de Ovos de Parasitas/veterinária , Estômago de Ruminante/parasitologia , Ureia/sangueRESUMO
Goats are highly susceptible to Haemonchus longistipes and could therefore serve as an inexpensive model to study camel haemonchosis. The course of the disease in goats is similar to that in camels and to H. contortus infection in sheep and goats. Unlike the age-dependency of camel haemonchosis, however, the severity of H. longistipes infection in goats is dose-dependent and varies from mild to hyperacute.
