Figure 1From: Developmental plasticity and the evolution of parasitism in an unusual nematode, Parastrongyloides trichosuriLife cycle of P. trichosuri. P. trichosuri first larval stage may develop to either short lived free-living nematodes or into infective larvae (iL3), which require an appropriate host in order to complete their parasitic life cycle. Environmental factors influence this developmental switch.Back to article page