Article: A minor case of Infectious Bronchitis(IB) along with that secondary infections salmonellosis and ecoli were there.

Dear Vets

Today I have a minor case of Infectious Bronchitis(IB) along with that secondary infections salmonellosis and ecoli were there. first i will summerize this viral disease

INFECTIOUS BRONCHITIS Infectious Bronchitis (IB) is probably the commonest and highly contagious viral disease of poultry, Caused by Corona Virus. This virus can survive upto 4 weeks in premises. Morbidity is 50-100%. Mortality is 0-25% depending upon the secondary infection. Poor ventilation and high density are the predisposing factorsIts affects vary with,

1- Virulence of the virus

2- Age of the bird

3- Prior vaccination

4- Maternal immunity (young birds);

5- Complicating infections (Mycoplasma, Ecoli, Salmonella and other viral infections

SIGNS AND SYMPTOMS

● Depression.

● Huddling.

● Poor growth

● Loss of appetite.

● Coughing, gasping, dyspnoea.

● Wet litter.

● Diarrhoea.

● Miss shapen eggs, Poor egg shell quality (in layers)

● Diuresis.

POST MORTUM LESIONS

● Mild to moderate respiratory tract inflamation

● Tracheal oedema.

● Tracheitis.

● Airsacculitis.

● Caseous plugs in bronchi.

● Kidneys and bronchi may be swollen and they and the ureters may have urates.

● Secondary infections(mycoplasma, ecoli, salmonella) may or may not be found.

DIAGNOSIS

● Tentative diagnosis is based on clinical signs, lesions and serology.

● Definitive diagnosis done by Flourescent Antibody Technique and ciliostasis in tracheal organ culture, ELISA, Sero-neutralization(SN) Haemagglutination inhibition

● Differential diagnosis from Newcastle disease (lentogenic and mesogenic forms), mycoplasmosis, vaccinal reactions, Avian Influenza and Laryngotracheitis.

TREATMENT

● Sodium salicylate

● Bronchodilators and mucolytics (sulbutamol, Bromhexine, Ambroxol hydrochloride)

● Antibiotics to treat secondary infections.The pictures below shows IB along with salmonellosis and ecoli.