8. Filariae Flashcards
live in tissue or the lymphatic system and are rarely seen
Adult worms
Adult filariae produce larvae called _______ (detected in ______ )
- Microfilariae
- blood
Two known morphologic forms:
- Adult worms
- Microfilariae (larvae)
Adult worm appear ______ and assume a ______ appearance.
- creamy white
- threadlike
Two key characteristics:
•Distribution of nucleiwithin the tip of the tail.
•Presence or absence of sheath (delicate transparent covering)
Only _____ infective larvae injected by an infected arthropod at the feeding site, are required to initiate human infection.
1 to 4
parasites are present in the bloodstream during a specific time period
Periodicity
The primary method of filarial diagnosis is ___________ of the microfilariae in a ________ or a tissue scraping of an infected nodule.
- microscopic examination
- Giemsa-stained smear of blood
A technique that lyses the cells
Knott technique
enlargement of skin and subcutaneous tissue
Elephantiasis
transient swelling of subcutaneous tissues
Calabar swelling
