(a) ldentify specimens N, O and Q.
Specimen N; Specimen O; Specimen Q;
(b) Name one host of each of specimens N, O and Q.
(c) Name four economic importance of each of specimens N and Q.
(d) State four control measures for specimen O.
Explanation
(a) ldentification of specimens:
- N - Ascaris,
- O - Tick,
- Q - Tapeworm
(b) Host of the specimens:
- N - Pig. poultry,
- O - Sheep, goats, cattle,
- Q - Sheep, goat, cattle
(c) Economic importance of the specimens on their host:
Specimen N:
- The life organism causes
- reduced growth rate of animals
- loss of appetite in animals
- weakness and unthriftness
- loss in weight/emaciation/reduced product yield
- damages body tissues during the migration of young worms
- animal may die from heavy infestation.
Specimen Q:
- The life organism causes:
- loss of blood leading to anaemia
- loss in weight/emaciation
- reduced growth rate
- reduced milk yield
- unthriftness/weakness/loss of condition
- increased feed consumption without a corresponding weight gain
- poor meat quality
(d) Control measures for specimen O.
- rotational grazing
- burning of infested pastures
- dipping in acaricides
- spraying with acaricides
- handpicking
- dusting
- introducing predators e.g. cattle egrets/biological control.