Final answer:
Strongyloides spp., commonly called lungworms, is true. They are difficult to eliminate due to their unique life cycle involving both free-living and parasitic forms.
Step-by-step explanation:
Strongyloides spp., commonly called lungworms, is True. Although uncommon, Strongyloides spp. are difficult to eliminate. They have a unique life cycle that involves both free-living and parasitic forms. The larvae of these nematodes can penetrate the body through the skin and travel to the lungs and then to the intestine, causing strongyloidiasis.