Lab 4 - Additional info Flashcards
There are three distinguishing features of Gastrotrichs:
1 - Presence of a ______ ______
2 - Modified ______ surface with ______ or _____-like covering on the ______ side
3 - Distribution of _____ is visually restricted to the ______ side
1 - Forked tail
2 - cuticular; spines; scale; dorsal
3 - cilia, ventral
The ascaris pharynx is __-radiate.
Tri
Adult Ascaris lives in the lumen of the ______ _______.
SI
What are optimum soil conditions for Ascaris eggs?
Moist, warm and shaded soil
Where do Ascaris larvae mature?
Lungs
How is trichinellosis acquired?
By ingesting meat containing cysts
Where do larvae of trichinella spirosis encyst?
Striated muscles
What is responsible for Trichinosis?
Trichenella spiralis
What muscle type does trichinellosis affect?
Skeletal
What type of meat could cause trichinosis?
Undercooked (pork)
The Dog heartworm is also called what?
Dirofilaria immitis
Dirofilaria immitis alternates between what two hosts?
Which is definitive, which is intermediate?
Mosquito - intermediate
Dog - definitive
Adult Wucheraria live where?
Lymph nodes
What are the embryos of Wucheraria called?
Microfilaria
How is Wucheraria carried to humans?
By mosquitos
What disease is associated with Wucheraria?
Elephantiasis
What is the common name for wucheraria bancrofti?
Human filarial worm
Fertilized female pinworms, migrate from the ____ (usually at ____) and lay thousands of eggs in the _______ region.
colon (night)
perianal region
How can embryonated eggs of the human pinworm enter the digestive tract?
- Inhalation of dust contaminated with eggs
- Direct ingestion
Acanthocephalans are ________.
endoparasitic
What characterizes Acanthocephalans?
A protrusible probosci covered by recurved spines
What does the protrusible probosci provide for Acanthocephalans?
anchors them to mucosal lining of vertebrate host
What does pseudocoelomate mean?
Lack a functional gut
Juvenile nematomorphs parasitize ______, as adults they are ________
arthropods
free-living
