Localization of larvae of Metastrongylus apri (Gmelin, 1790) Vostokov, 1905, the lungworm of pigs, in the annelid Eisenia foetida Savigny, 1826.

The first stage larvae of Metastrongylus apri could be recovered from the crop of Eisenia foetida after 24 hours of their infection. These were found invading the calciferous glands of the annelid as early as 48 hours post-infection. The larvae were subsequently found localized in the calciferous glands. hearts, dorsal vessel, anterior part of crop and part of the oesophagus anterior to the calciferous glands of the annelid. In general, the larvae had a preference for the circulatory vessels of the annelid so that great majority of them inhabit in the vascular system and the blood sinuses of the above mentioned organs.