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.

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