Flashcards in Lecture 19 Deck (66)
Types of Metazoa parasites
cestodes, trematodes, nematodes
What are cestodes?
How many parts do tape worms have?
2- rounded head and flat body of multiple segments
What is the rounded head of the tape worm known as?
What is the flat body of multiple segments of the tape worm called?
What is the host of tape worms?
4 types of tape worms?
pork, beef, fish, and dog tape worms
What do pork tape worms cause?
disease known as cysticircosis in humans
name of larvae in pork
What happens when humans swallow eggs?
larval form cysticerci develop in various organs like brain and eye where they encyst
What will happen when the cysticerci is in brain
mimic brain tumors and causes headache, vomiting, seizures
What will happen when cysticerci is in the eye?
may cause uveitis and retinitis
Where is the pork tape worm most common?
Asia, S. America and eastern Europe
Treatment for adult pork tape worms
Treatment for cysticercosis from pork tape worms
Transmission of beef tape worm
humans infected by eating under cooked beef containing larvae
Who is the host of beef tape worm?
Who is the intermediate host of beef tape worm?
Where is beef tape worm commonly found?
Africa, S. America and Eastern Europe
Clinical features of beef tape worm?
adult worms do not cause symptoms- proflatids protrude through anus
Treatment for beef tape worm?
Transmission of fish tape worm?
eating raw/uncooked fish containing larvae
Symptoms for adult worm fish tape worm
asymptomatic- may produce anemia due to B12 deficiency
What does dog tape worm cause?
hydatid cyst in humans
Who is the definitive host in dog tape worm?
What is the intermediate host for dog tape worm?
What is the dead and intermediate host of dog tape worm?
Transmission of dog tape worm
worms in the dog liberate thousands of eggs- ingested by sheep or human and embryo emerges into intestine and migrates to liver, lung, bone and brain
Where do the large fluid filled hydatid cyst develop in the body?
brain, lung, liver