Categories Of Diseases in Poultry

Disease

Cause

Ages affected

Species

Mortality

Signs and Symptoms

Pathognomonic lesions

Control

External parasites

Insects, arachnids

All

All

Usually low unless

Birds can become weak and unthrifty in heavily infested.

Skin: Mites, ticks, fleas and lice can cause itching, loss of feathers.

Reproductive: decreased egg numbers

According to type of external parasite

Cleaning of environment between flocks, pesticides applied to the bird and the environment

internal parasites

Various worms

All but the most severe

Disease is In young birds

All

Mortality is variable depending on the age of

The birds, type and severity of infestation

Depression, failure to gain weight, anemia.

Digestive: Diarrhea.

According to type of external parasite

Mycotoxicosis

Toxins

Young birds more severely affected

All although signs more severe in ducks

Variable

Nervous: difficulty walking, convulsions, feather picking

Reproductive: Reduced fertility and hatch rates. Decreased egg numbers

Pale liver of birds, stomatitis

Remove contaminated food

Vitamins & minerals deficiency

Unbalanced ration or secondary to some enteric diseases

All

All

Usually low in free-ranging birds. May be moderates to high in young, confined birds

Vitamin E: Death before 4 days of age

Nervous: Difficulty walking and standing, 15-30 days of age

Reproductive Decreased hatchability.

Vitamin A: Slow growth, drowsiness, ad mortality.

Respiratory: Discharge from nose and eyes.

Reproductive decreased egg numbers and hatching, increased blood spots in eggs.

According to type of vitamin

Supplement vitamins in the water or feed. Add antioxidants to feed. Rotate feed.