What is the Infective stage of the following parasite? “HATE”Hymenolepis nanaAscaris lumbricoidesTrichiuris trichiuraEnterobius vermicularis
embryonated eggs
The infective stage for each of these parasites is:
1. Hymenolepis nana: The infective stage for Hymenolepis nana is the cysticercoid larvae. These larvae are found in contaminated food or water, and when they are ingested, they develop into adult worms in the small intestine.
2. Ascaris lumbricoides: The infective stage for Ascaris lumbricoides is the infective eggs. These eggs are found in contaminated soil, and when a person ingests them, the larvae hatch in the small intestine and migrate through the liver and lungs before returning to the small intestine where they mature into adult worms.
3. Trichiuris trichiura: The infective stage for Trichiuris trichiura is the infective eggs. These eggs are found in contaminated soil, and when a person ingests them, the larvae hatch in the small intestine and mature into adult worms in the large intestine.
4. Enterobius vermicularis: The infective stage for Enterobius vermicularis is the infective eggs. These eggs are found in contaminated food or water, and when a person ingests them, the larvae hatch in the small intestine and migrate to the large intestine where they mature into adult worms. Additionally, the female worms lay eggs around the anal region which can cause itching and reinfection.
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