RESUMEN
A simple method of breeding large numbers of rabbit fleas in a rabbit house with minimal disruption to the general routine is described.
Asunto(s)
Mixomatosis Infecciosa/transmisión , Siphonaptera/crecimiento & desarrollo , Animales , Australia , Femenino , Masculino , Métodos , Embarazo , ConejosRESUMEN
Kittens with maternal antibodies to myxoma virus, the offspring of rabbits which had recovered from myxomatosis, were exposed to fleas contaminated with myxoma virus and/or contact with infected rabbits from birth. All kittens died or became infected before 8 weeks of age. When compared with adult animals similarly infected the kittens showed no advantage in terms of survival time or recovery rate attributable to maternal antibodies. Flea transmission of virus was found more effective than contact transmissions.
Asunto(s)
Inmunidad Materno-Adquirida , Mixomatosis Infecciosa/inmunología , Conejos/inmunología , Siphonaptera , Animales , Anticuerpos Antivirales/análisis , Femenino , Genética Microbiana , Insectos Vectores , Masculino , Intercambio Materno-Fetal , Myxoma virus , Mixomatosis Infecciosa/transmisión , Embarazo , Factores de TiempoRESUMEN
Rabbit fleas for use in Myxomatosis investigations have been successfully bred on rabbits in an animal house. The timing of emergence appeared to be governed by a biological timing control interacting with different forms of disturbance. Yield was found to be related to litter size, the time the doe and her kittens were removed from the nest, the number of fleas put onto a doe before littering and the mean ambient temperature to which the doe was exposed in the week pre-partum. The survival rate of fleas in storage was affected by temperature, the degree of crowding, moisture content of the containers, whether fleas were fed or unfed and the source of fleas in terms of emergence times.
Asunto(s)
Cruzamiento , Mixomatosis Infecciosa , Conejos , Siphonaptera , Animales , Femenino , Vivienda para Animales , Métodos , Embarazo , TemperaturaRESUMEN
1. The European rabbit flea Spilopsyllus cuniculi (Dale) bred successfully in wild rabbits on three properties in New South Wales and, within two breeding seasons, almost every rabbit shot within a quarter of a mile of a release site was infested.2. It was demonstrated that the flea transmitted myxoma virus in the field.3. In areas where more than 75% of the rabbits shot at the beginning of the breeding season were flea-infested and myxoma virus was present, populations failed to show the expected summer build-up.
Asunto(s)
Mixomatosis Infecciosa , Conejos , Siphonaptera , Agricultura , Animales , Australia , Vectores de Enfermedades , Ecología , Estaciones del Año , ZoonosisRESUMEN
The response of wild and domestic rabbits with a degree of genetic resistance to myxomatosis has been shown to be markedly affected by the age at which they were infected with a virulent strain of the virus. The response, in terms of mean survival time and percentage survival, fell with increasing age from 10 to 30 weeks with little change thereafter.