Week Four: Phylum Acanthocephala (Chapter 9) Flashcards Preview

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Flashcards in Week Four: Phylum Acanthocephala (Chapter 9) Deck (11):
1

What are acanthocephalans?

Thorny-headed worms

2

Who do acanthocephalans mostly parasitize?

Marine and freshwater fish
Aquatic birds

3

What is the thorny headed worm of swine?

Macracanthorhynchus hirundinaceus

4

What is the thorny headed worm of dogs?

Oncicola canis

5

What are some morphologic features of acanthocephalans?

Elongate, cylindric, tapering at both ends, dioecious (females are larger than males)

6

What are the hook things on an acanthocephalans head called?

Proboscis (retractable proboscis)

7

What are acanthocephalans organ of attachment?

Retractable proboscis

8

How do acanthocephalans absorb nutrients?

Through tegument

9

Explain the life cycle of acanthocephalans

-Eggs voided in feces of definitive host
-Intermediate host ingests the egg
-Larva hatches in intermediate host
-Larva develops into acathella, then cystacanth
-Definitive host ingests arthropod intermediate host
-Attaches to wall of small intestine

10

Macracanthorhynchus hirudinaceus:
Host, location of adult, intermediate host, transmission route, common name

Host: Pigs
Location: small intestinal mucosa
I. Host: Dung beetle
TR: Ingestion of infective dung beetle
CN: Thorny headed worm

11

Oncicola canis:
Host, location of adult, intermediate host, transmission route, common name

Host: Dogs
Location of host: Small intestinal mucosa
I. Host: Dung beetle
TR: Ingestion of infected dung beetle
CN: Thorny-headed worm of dogs