A survey to assess the prevalence of parasitic infections among axis deer (Cervus axis) in three National Parks in India revealed infections with the lungworm Muellerius capillaris. Clinical signs were not evident in infected animals. Therefore, it is suggested that C. axis is probably a carrier of the infection. Under laboratory conditions, terrestrial molluscs (Macrochalamys sp.) were infected with first stage larvae of M. capillaris collected from fecal pellets of C. axis. Feeding of third stage larvae collected from these snails on day 14 post exposure produced patent infections in goats. On day 31 post infection, adult M. capillaris could be collected from the lungs of infected goats. This study establishes the possibility of cross-transmission of M. capillaris between wild and domestic animals in India.