Observations on the output of nematode eggs in faeces and on the subsequent pasture infestation with third stage larvae produced by a herd of farmed red deer (Cervus elaphus)

agriculture intensive angleterre cerf rouge ciervo rojo enfermedades parasitarias england epidemiologia epidemiologie epidemiology inglaterra intensive farming larvae larvas larve parasitose parasitoses pastizales pastures red deer trichostrongylus