Parasites.

Parasites.

To parasites of the kidney belong the echinococcus, the larval, or bladder worm, stage of the small echinococcus tapeworm of the dog. Dioctophyme renale, the largest of roundworms, has been found in the kidney of the horse. Its presence can be certified only by the passage of its microscopic eggs or of the entire worm. Immature stages of roundworms, either Strongylus equinus or a related species, may be found in the renal artery or in the kidney itself.