Hassalstrongylus forresteri

Hassalstrongylus forresteri is a nematode worm of the genus "Hassalstrongylus" that infects the marsh rice rat ("Oryzomys palustris") in the United States. It was first described as "Hassalstrongylus musculi" by Marie-Claude Durette-Desset in 1972, but she later recognized it as a different species, "H. forresteri". The females cannot be distinguished from those of the other species in the marsh rice rat, "H. musculi" and "H. lichtenfelsi".