Abstract
Smales L. R. 1977. The life history of Labiostrongylus eugenii, a nematode parasite of the Kangaroo Island Wallaby ( Macropus eugenii): the parasitic stages. International Journal for Parasitology 7: 457–461. Labiostrongylus eugenii infective larvae ingested by the Kangaroo Island Wallaby exsheathe on the saccular stomach wall, then invade the mucosa causing one or two chronic irritative hyperpastic nodules, each containing a number of larvae. Six to eight weeks later the larvae leave the stomach wall and moult to fourth-stage. The fourth-stage larva is characterized by eight lips, while the oesophagus and anterior intestine assume the adult form. The posterior ends of late fourth-stage larvae become sexually differentiated. Moulting to adult occurs after 6–8 weeks with the first gravid females being observed 3 months later. The prepatent period appears to last about 6 months. Reasons for failure of experimental infection trials and the epidemiological significance of the life cycle were discussed.
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