Parasitology: Cestodes Flashcards
1
Q
A
T. saginata
- Epidemiology: global
- Host: humans
- Intermediate host: cattle
- Vector
- Features: no hooks on scolex, proglottid has > 13 lateral branches, Cystercercii found in muscle (masseter, calf, etc…)
- Sx: tape worm that is not a serious health problem
- NO wt. loss
- Dx
- Rx: Praziquantal
- Control: proper cooking & beef inspection
2
Q
A
T. solium
- Epidemiology
- Host: humans
- Intermediate host: pigs
- Features: hooks on scolex, proglottid has
- Sx: results in cystercercosis on skin and brain, eye (unilocular blindness)
- Dx
- Rx: Niclosamide, anti-parasitic, anti-inflammatory, neurosurgery
- Control: proper cooking & pork inspection
3
Q
A
Dipylidium caninum
- Definitive host: humans & dogs
- Intermediate host: fleas
- Features
- proglottids look like grains of rice
- fleas ingest the eggs
4
Q
A
Diphyllobothrium latum aka broad tapeworm
- Epi: global in fresh water lake areas
- Host: fish eat larva of parasites > humans get parasite by fish ingestion
- Intermediat hosts: dogs, cats, bears
- Features
- Sx: Megaloblastic anemia
- Dx
- Rx: Praziquantal & B12 supplements
- Control
5
Q
A
Echinococcus granulosus causing Cystic echinococcus aka Hydatid disease
- Epi: worldwide where sheep live
- Host: dogs &
- Intermediate host: sheep w larval stage of parasite
- Transmission: cyclozoonosis (adult tapeworm produces eggs)
- Features: protoscloicies will develop into hyatid cyst; laminated membrane -> fertile cyst on US imaging: look like snowflakes in snowglobe when turn pt over
- Secondary hydatid disease: in humans, if cysts spill in abdomen
- Sx: lung, hepatomegaly, unilocular blindness, SOL in brain
- Dx: US (Gold Standar), ELISA, X-ray, CT, MRI
- Rx: Surgical (PAIR), albendazole
- Control
6
Q
Echinococcus multilocularis (Alveolar Hydatid Disease)
A
- Epi: temperate climates such as Canada & Europe, China, USA (Northern)
- Definitive hosts: fox & coyotes, dogs, cats
- Intermediate host: rodents
- Features: lesions are in liver
- Transmission: humans accidentally ingest eggs from fruits and playgrounds
- Rx: Alb
