(a) List three stages in the life cycle of specimen G (Liver Fluke) (b) State four effects of specimen G on the farm animals. (c) Mention three ways of cont...

Answer Details

(a) Three stages in the life cycle of specimen G (Liver fluke)

1. Miracidium (larva that hatches from the egg and enters the snail host).
2. Cercaria (larva that leaves the snail).
3. Metacercaria/adult fluke (encysts on herbage, is eaten, and matures in the liver).

(b) Four effects of specimen G on farm animals

• Damages the liver, causing liver rot (fascioliasis).
• Causes anaemia and general weakness.
• Causes emaciation and loss of condition, with swelling under the jaw (bottle jaw).
• Reduces productivity and may lead to death.

(c) Three ways of controlling specimen G on farm animals

• Control or eradicate the snail intermediate host.
• Drain marshy areas and avoid grazing on wet, swampy pastures.
• Deworm the animals regularly with a suitable flukicide.

(d) Specimen H (Tapeworm) - to be drawn and labelled

The drawing should show the head (scolex) bearing suckers/hooks, the neck, and the long chain of body segments (proglottids).