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Lifecycle of the Roundworm

Lifecycle of the Roundworm. Eggs hatch on the ground & are eaten by an animal. Eggs passed out of body through feces. Enter intestine. The larvae penetrate the intestinal wall. Enter bloodstream. Larvae move through blood to the liver. Larvae grow & develop in lungs. Enter lungs.

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Lifecycle of the Roundworm

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  1. Lifecycle of the Roundworm Eggs hatch on the ground & are eaten by an animal. Eggs passed out of body through feces. Enter intestine The larvae penetrate the intestinal wall .

  2. Enter bloodstream Larvae move through blood to the liver. Larvae grow & develop in lungs. Enter lungs

  3. Larvae mature & reproduce. Larvae are coughed up, re-swallowed, & return to intestines.

  4. Lifecycle of the Tapeworm Animal ingests intermediate host & receive larvae. Larvae turn into adult. Adult lives in small intestine & feeds off of host.

  5. Adult body is made up of egg-filled worm segments. Egg-filled segments leave body through the feces.

  6. Larvae develop in intermediate hosts. Beetles, Mosquitoes, Crickets, etc. ingest eggs (intermediate host).

  7. Lifecycle of the Mosquito Adult lays egg directly in the water or on dry surfaces. Eggs hatch to larval form once they are moistened. Larvae change to pupa form in water.

  8. Carries many diseases: Encephalitis, malaria, fowl pox, etc. Metamorphosis occurs changing larvae to adult.

  9. Lifecycle of the Bot Fly Adult fly lay eggs onto horse’s leg. (up to 500) Horse licks leg. Eggs get into mouth.

  10. Eggs hatch in mouth. Larvae develop in mouth and is swallowed.

  11. Pupa burrow into the ground until adult fly emerges during warm weather. (4 to 8 weeks) Larvae migrate to stomach and attach to stomach walls for 8 to 10 months. Larvae change into pupal stage & leave with feces.

  12. Parasites Bot Fly Tapeworms Scolex Proglottids Roundworms Mosquito

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