Platyhelminthes II (basics) Flashcards
(25 cards)
Acraspedote
no overlapping of proglottids
Pseudophyllidea (3) vs Cyclophyllidea (2)
Pseudophyllidea: need water, have 2 intermediate hosts, and have bothria
Cyclophyllidea: terrestrial hosts (no water needed) and have acetabula
Craspedote
Front proglottid overlaps the proglottid behind it
Anapolytic
Eggs are released singularly through a pore
Apolytic
Entire gravid proglottid is released to disperse eggs
Pseudophyllidean life stages
Coracidium
Precercoid
Pleurocercoid
Coracidium
ciliated, free-living pseudophyllidean larva
Precercoid
larva in the first intermediate pseudophyllidean host (typically an arthropod)
Plerocercoid
- Larva in the second intermediate host
- Infective to humans
- Found in fish
Cyclophyllidean life stages
a. Onchosphere
b. Cysticercoid
c. Cystercus
d. Hydatid Cyst
Onchosphere
- Shelled larval form that is passed in feces
- Usually has hooks
Cysticercoid
Larval form in the intermediate host when host is an invertebrate
Cysticercus
Larval form in intermediate host when that host is a vertebrate
Hydatid Cyst
Polyembryonic larval form in a vertebrate intermediate host
Diphyllobothrium latum common name
Fish Tapeworm
Taenia saginata common name
The Beef Tapeworm
Taenia solium common name
The Pork Tapeworm
Echinococcus granulosus defining feature
Teeny, little worm
Echinococcus multilocularis distribution
Arctic/Subarctic Distribution
Hymenolepis dimunata common name
Common Rodent Tapeworm
Hymenolepis nana
The Dwarf Tapeworm of Rodents & Humans
Taenia pisiformis host
Dog
Taenia taeniaformis host
Cat
Diphyllidium caninum hosts
dogs, cats, humans
