Helminths Life Cycle
**just know, cycle A is when the worm becomes an adult and has babies in the human** human is intermediate host and definitive.
**just know, cycle A is when the worm becomes an adult and has babies in the human** human is intermediate host and definitive.
Toxocara species
Cycle A - cat or dog poops out the worms and another cat or dog or HUMAN eats it
Enterobius vermicularis (pinworm)
Cycle A - child poops out the egg and another human eats it
Ascaris lumbricoides (intestinal roundworm)
Cycle A - human re-swallows the worm. the larval and adult stage is in humans
Trichuris trichiura (whipworm)
Cycle A - human's prolapse barrel ass poops out the egg and another human eats it
**just know, cycle B is when the worm becomes an adult in the environment and has babies in the human** human is definitive and environment is intermediate.
**just know, cycle B is when the worm becomes an adult in the environment and has babies in the human** human is definitive and environment is intermediate.
**just know, cycle C is when the worm becomes an adult in the animal and has babies in the human after being eaten.** but human is technically the definitive and intermediate host, just weirdly
**just know, cycle C is when the worm becomes an adult in the animal/fish and has babies in the human after being eaten.** but human is technically the definitive and intermediate host, just weirdly
**just know, cycle D is when the worm becomes an adult in the environment and has babies in the human.** human is intermediate host, environment is definitive.
**just know, cycle D is when the worm becomes an adult in the environment and has babies in the human.** human is intermediate host, environment is definitive.
Cycle C Helminth Life Cycle
Adult matures in human intestine, eggs are released in feces. The eggs are eaten by grazing animals. It becomes a cyst in the grazing animal tissue. Human eats the contaminated meat, the cyst releases the larvae into the human. Larvae develops and matures into an adult. [human is definite and intermediate host]
Necator americanus and Ancylostoma duodenale (hookworms)
Cycle B [worm grows and develops into an adult in the environment. but the adult worms penetrates the people's foot and releases babies in the human]
Diphyllobothrium latum (fish tapeworm)
Cycle C [worm grows into an adult in fish, and have babies in humans as the contaminated fish is eaten]
Hymenolepis nana (dwarf tapeworm) and Hymenolepsis diminuta (rat tapeworm)
Cycle C [worms grows into an adult in bugs and have babies in the rats or humans in which the bug bites]
Taenia Solium
Cycle C [worms grows into an adult in pork and have babies in the humans in which the pork is eaten]
Schistoma mansoni and Schistoma japaricum
Cycle D [larva develops into an adult in human bladders, but have babies in water - contaminating it]
Opisthorchis sinensis & Clonorchis sinensis
Cycle D [larva develops into an adult in the human bile duct, but is pooped out and has babies in the environment]
Fasciola hepatica
Cycle D a weird cycle D as [the worm has babies in the gall bladder and liver, but develops into an adult in the environment]
Cycle D Helminth Life Cycle
Eggs released with human feces. Larva matures out in the environment. It later infects humans through ingestion or direct penetration. [human is intermediate, environment is definite]
Cycle A Helminth Life Cycle
Worm develops into adult in human intestines. It makes eggs and release it into the human feces. Egg is ingested by new human host and cycle starts over. [human is intermediate and definite host]
Cycle B Helminth Life Cycle
Worms is an adult in human intestine and makes babies/eggs. The eggs released are with human feces. The eggs/larvae hatch and develop into adults in the environment. Adult worm penetrates humans through skin. [human is definite host, environment is intermediate]
