I. Viral Diseases
a) Ranikhet Disease (New Castle disease)
- Affect birds of all ages
- Most destructive disease in broilers (upto 100% mortality)
- Affect birds of all ages
- Sneezing, Cough, gasping for breath initially
- Later on greenish water diarrhea with odour and twisting of head
b) Fowl pox/Chicken pox(Pox virus)
Yellowish wart like growth on combs and wattles.
c) Mareck’s Disease (Herpes Virus)
Tumours may develop in spleen, Kidney, Skin, Eyes, Gonads.
d) Gumboro Disease
- Chicks of 3 weeks age become most susceptible to other infections as immunity weakens.
- Layers are most susceptible.
II. Bacterial Diseases
a) Infectious Coryza (Haemophilus gallinarum)
- Discharge from eyes and nostrils
- Eyelids stick togeather
- Swelling of eyes & face
- Can be controlled using Sulphurdrug@0.05% in feed or water or Tetracycline and Streptomycine
- Greens, rich in Vit A, Such as Barseem and Lucerne may be fed to prevent this.
b) Collibacillosis (E. coli)
Symptoms are diarrhoea of varying degrees, swelling on wattle & comb, poor growth.
III. Protozoan Diseases
a) Coccidiosis
- Intracellular parasites mainly affect the intestines of chicks between 3 – 10 weeks age
- Cause heavy mortality(50 -70%)
- Affected birds do not eat
- Blood and mucus is seen in droppings
- Drooping of wings
- Reduction in egg yield
b) Spirochaetosis(Tick fever)
- High fever and restlessness in birds
- female birds are more susceptible than males.
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