Sheep Nematodes

Question 1

Cysticercus ovis in sheep has what adult name?

[what about cysticercus bovis in cattle?]

Answer 1

Cysticercus ovis = taenia ovis

Cysticercus bovis = taenia saginata

Question 2

Where in the body of sheep do you find cysticercus ovis? and what is the final host?

Answer 2

Muscle

final host = dog

Question 3

Name 2 parasites found in the sheep abomasum.

Answer 3

Teladorsagia circumcincta and Hemonchus contortus

Question 4

Name 2 parasites found in the sheep small intestine

Answer 4

Trichostrongylus spp and Nematodirus battus

Question 5

What can be attributed to the most of the decreased growth rate in parasitized lambs?

Answer 5

reduced feed intake

Question 6

Is pepsinogen increased or decreased with abomasal worms?

Answer 6

Increased

Question 7

what are the benefits of bioactive forages?

Answer 7

Reduce larval challenge, increase protein supply, tannins, anthelmintic activity

Question 8

What is neo-suppressive anthelmintic use?

Answer 8

Repeated treatments throughout grazing season @ intervals slightly longer than pre-patent periods (4 weeks)

Question 9

What is opportunistic anthelmintic use?

Answer 9

Coincident w/ management (ex- lambing, weaning, tupping)

Question 10

What is therapeutic anthelmintic use?

Answer 10

Tx of clinically ill individuals or groups

Question 11

What is the length of fluke life in cattle vs. sheep?

Answer 11

Cattle - fluke live 1-2 years, sheep - fluke live as long as the sheep

Question 12

Which flukicide can be used early in fluke life (as well as immature and adult)?

Answer 12

Triclabendazole

Question 13

Which flukicide does rumen and liver fluke?

Answer 13

Oxyclozanide

Question 14

With strategic (group) flukicide use, when would you be treating the flock?

Answer 14

~April, July, December

Aim is to reduce pasture contamination w/ fluke eggs