Ascariasis

This micrograph reveals a fertilized egg of the round worm Ascaris lumbricoides; Mag. 400X. This micrograph reveals an unfertilized egg of the round worm Ascaris lumbricoides; Mag. 400X. This photomicrograph depicts a fertilized egg of the parasite Ascaris lumbricoides. This micrograph depicts an embryonated Ascaris lumbricoides egg with no outer mammillated layer, i.e., “decorticated”. These are 3 fertilized A. lumbricoides eggs with the one on the right being decorticated, for its outer layer is absent. This diagram depicts the various stages in the life cycle of the intestinal roundworm nematode Ascaris lumbricoides. This micrograph reveals both fertilized (A) and unfertilized (B) Ascaris eggs, and a Trichuris egg (C); Mag. 125X.