Roundworms In Poultry

Roundworms are the most important worms of poultry. Among them, the large roundworm

Ascaridia galli is the most common. Ascaridia are the largest roundworms of birds. The adults live

in the lumen of the small intestine. The larval stages invade the intestine.

Harmful Effects

I. A. galli infection causes poor bodily condition and weight loss. The degree of effect is related to the number of worms present.

2. In severe infections intestinal blockage can occur. This may lead to deaths, especially in younger

birds. Chickens infected with a large number of worms suffer from loss of blood, retarded growth, enteritis (inflammation of the intestine), and greatly increased mortality.

Diagnosis

The worms are easily seen on postmortem examination in the small intestine (Fig. 93, 94).

Treatment

I. Piperazine compounds have been widely used for treatment against Ascaridia infection, since they are non-toxic. Piperazine may be given to chickens in the feed, water, or as a single treatment.

2. Piperazine in drinking water is the best practical method of giving piperazine for commercial flocks.

3. Fenbendazole is also effective.

Control

I . Roundworms, in large part, can be prevented by raiSing birds in cages.

2. Poultry should receive a diet which is adequate, especially in vitamin A and vitamin B complex compounds. Lack of these vitamins makes poultry more susceptible to worm infections.

3. Proper management of litter. Keep the litter as dry as possible by frequent stirring. Change of litter can reduce infections. Litter may also be treated with suitable insecticides.

4. Avoid overcrowding. Overcrowding produces more favourable conditions for worm development by increasing the chances of infection. Overcrowding provides more warmth and moisture, both of which favour the development of worm eggs.

5. Extreme care should be taken to ensure that feed and water are not contaminated.