BIOL 4105 Chapter : 7 12 12 Part II
Document Summary
Dioctophyme renale giant kidney worm : giant, female is 100 cm long. Blood red: definitive host: large animals, pigs, horses, cattle, fish-eating carnivores. Some alternate- free-living and parasitic cycles without pattern. Strongyloides stercoralis- man, primate, dogs, cats, other mammals. Rise in prolactin and estrogen develops mammary tissues and stimulates the parasite to migrate to the mammary glands: source- contaminated soil or water. Infective stage: j3 (filariform larva) can swim: two life cycle choices, heterogonic- free living with both sexes. No idea what the stimulus is for the switch: life cycles, j3 is the pivotal stage, determines which life cycle it will do. In the host: filariform- penetrates the skin, wants to get to the gi tract. In the environment: j1 free-living: clinical disease- three stages, penetration- usually asymptomatic. May see an inflammatory response to the j3 if you"ve been infected multiple times and develop a reaction to it.
