152 Lab Practical 2

Fasciolopsis buski intermediate, definitive, reservoir host

intermediate: snail, aquatic vegetation

definitive: human/pig

reservoir: dog/pig

Fasciolopsis buski infective stage

metacercariae

Fasciolopsis buski transmission

fecal/oral via secondary intermediate (ingestion of metacercariae on aquatic vegetation)

Clonorchis sinensis intermediate, definitive, reservoir host

intermediate: snail, broad fish

definitive: human

reservoir: dogs, pigs

Clonorchis sinensis infective stage

metacercaria

Clonorchis sinensis transmission

fecal/oral via int. hosts (ingestion of raw/undercooked fish)

Schistosoma spp. intermediate & definitive hosts

intermediate: snail

definitive: human

Schistosoma spp. infective stage

cercaria

Schistosoma spp. transmission

human waste in water

Schistosoma spp. disease

schistosomiasis

Diphyllobothrium latum intermediate, definitive, reservoir host

intermediate: broad fish

definitive: fish-eating mammals/human

reservoir: bears/dogs

Diphyllobothrium latum infective stage

plerocercoid

Diphyllobothrium latum transmission

eating raw/undercooked fish

Diphyllobothrium latum disease

pernicious anemia/B12 absorption

Taenia spp. intermediate & definitive host

intermediate: cattle

definitive: human

Taenia spp. infective stage

cysticercus

taenia spp. disease (rare)

neurocysticercosis (cysts in brain)

taenia spp. symptoms

unexplained weight loss, diarrhea, cramps

Taenia spp. transmission

eating contaminated meat (measly meat)

Hymenolepis spp. intermediate, definitive, reservoir host

intermediate: arthropods, stored-grain beetles

definitive: human/rat

Hymenolepis spp. infective stage

egg

Hymenolepis spp. transmission

accidentally ingesting infected insects in food

Trichinella spiralis definitive host

pigs; humans (dead-end)

Trichinella spiralis infective stage

encysted L1 larva

Trichinella spiralis transmission

ingesting raw/undercooked meat

Trichuris trichiura definitive host

human

Trichuris trichiura infective stage

mature egg containing L1 larva

Trichuris trichiura transmission

fecal/oral

Necator americanus definitive host

human

Necator americanus infective stage

L3 larva

Necator americanus transmission

contaminated soil penetrates human skin

Ascaris lumbricoides definitive host

human

Ascaris lumbricoides infective stage

mature egg containing L3 larva

Ascaris lumbricoides transmission

fecal-oral; ingestion of egg in contaminated food/water

ascaris lumbricoides symptoms

intestinal obstruction & rupture

Enterobius vermicularis definitive host

human (intestine)

Enterobius vermicularis infective stage

mature egg containing L3 larva

Enterobius vermicularis transmission

fecal-oral; contaminated bedding/clothing

enterobius vermicularis common name

pinworm

Wuchereria bancrofti definitive host

human

Wuchereria bancrofti infective stage

L3 larva

Wuchereria bancrofti transmission

bite of infected mosquito

Ascaris lumbricoides common name

giant roundworm

Necator americanus common name

new world hookworm

Trichinella spiralis common name

trichina worm

Trichuris trichiura common name

whip worm

Wucheria bancrofti common name

bancroft’s filaria

Wucheria bancrofti disease

filariasis

Clonorchis sinensis common name

chinese liver fluke

Fasciolopsis buski common name

giant intestinal fluke

Schistosoma haematobium common name

bladder fluke

Schistosoma japonicum common name

oriental blood fluke

Schistosoma mansoni common name

manson’s blood fluke

Diphyllobothrium latum common name

broad fish tapeworm

Hymenolepis diminuta common name

rat tapeworm

Hymenolepis nana common name

dwarf tapeworm

taenia saginata common name

beef tapeworm

taenia solium

pork tapeworm

Wucheria bancrofti vector

mosquito

Hymenolepis spp. vector

arthropods