Lab 7

Question 1

Do schistosomes have a second intermediate host?

Answer 1

no

Question 2

Schistosomatidae:

-Definitive host:

Answer 2

birds, turtles, fishes, humans

Question 3

Schistosomatidae:

-mature in:

Answer 3

blood vascular system of definitive host

Question 4

Schistosomatidae sexual lifestyle:

Answer 4

-dioecious (separate sexes)

Question 5

Schistosoma species. 3 of medical significance:

Answer 5

1. Schistosoma haematobium
2. Schistosoma mansoni
3. Schistosoma japonicum

Question 6

Are the snail hosts for schistosomes in USA?

Answer 6

No

Question 7

1. Schistosoma haematobium (where does it infect?)
   - eggs in:
   - Distribution:
   - niche:

Answer 7

(urinary)

• urine (terminal spine)
• found in most of Africa and parts of Middle East
• veins of urinary bladder plexus

Question 8

2. Schistosoma mansoni (where does it infect?)
   - eggs in:
   - found in:
   - niche:

Answer 8

-(intestinal)
-feces (lateral spine)
- Africa (Egypt and Sudan), parts of middle East, parts of South America,
Caribbean (thought brought to New World by slave trade)
-veins draining large intestine (inferior mesenteric veins)

Question 9

3. Schistosoma japonicum (where does it infect?)
   - eggs in:
   - found in:
   - niche:

Answer 9

• (intestinal)
• feces (rudimentary spine)
• Japan, China, Malaysia, Philippines, Indonesia
• veins draining small intesting (superior mesenteric veins)

Question 10

Males and females: how do they live in relationship to each other?

Answer 10

live in permanent pairs in copula

Question 11

Males and females:

-both feed on:

Answer 11

• blood

Question 12

Males and females:
which is longer and more slender?
which has more developed suckers?

Answer 12

• females

- males