Infectious coryza, Biology

Assignment Help:

Infectious coryza

A highly infectious bacterial disease of chickens caused by Hemop hilus paragallinarum, is characterized by catarrhal inflammation of the upper respiratory tract, especially nasal mucosa and sinuses.   It is generally accompanied by other respiratory viral or bacterial infections that may act as predisposing factors and may perpetuate the condition. There is high morbidity but low mortality if not accompanied by secondary infections. The route of infection is conjunctival or nasal with rapid onset of disease over a 3-4 days period. The infection may linger on in a flock for 1-2 weeks and recovered birds may become carriers. The bacterium is susceptible to environmental factors and is easily killed by heat, drying and disinfectants.

Symptoms and lesions: The most common symptoms seen are inappetance, sneezing, coughing, swelling of face, combs and wattles, ocular and nasal discharge that may become purulent. Egg production may drop to significant level. The post-mortem lesions depend upon involvement of secondary infections but mostly restrict to upper respiratory tract that include catarrhal inflammation of nasal passages and sinuses, sticky eyes, sometimes conjunctivitis,  and tracheitis.

Diagnosis: A presumptive diagnosis may be made on clinical signs, lesions and isolation and identification of the bacteria in a Gram-stained smear from sinus.

Prevention and control: An all-in/all-out production system should be the farm policy. The overall health management and balanced nutrition would keep the infection away from the farm. Vaccines are used in areas of high incidence.


Related Discussions:- Infectious coryza

Define quantitative procedures in carbohydrates, Define Quantitative Proced...

Define Quantitative Procedures in Carbohydrates? You have learnt how to identify some individual monosaccharides, disaccharides and polysaccharides. However, if we were asked t

Guards for machines and equipment, Guards for Machines and Equipment ...

Guards for Machines and Equipment Various machines and equipment used for manufacturing require guards for protecting the operator from any injury. These machines include: Wo

Poultry and duck diseases-avian encephalomyelitis, Avian encephalomyelitis ...

Avian encephalomyelitis This is an acute infectious disease of birds (3 weeks old), which is caused by a member of the genus Enterovirus in the family Picornaviridae. Epid

Normal pigmentation, The female I-1 and her mate, male I-2, had four childr...

The female I-1 and her mate, male I-2, had four children, one of whom has albinism. What is the probability that they could have had a total of four children with any other outcome

Define protection of poly unsaturated fatty acids, Define Protection of pol...

Define Protection of poly unsaturated fatty acids (PUFA) from oxidative damage? The major biological role of vitamin E is to protect PUFAs and other components of cell membrane

How are antivenoms produced, How are antivenoms produced? Why are antivenom...

How are antivenoms produced? Why are antivenoms an example of passive immunization? Antivenoms are getting by the following process: the venom (antigen) is inoculated into othe

Style of stigma interaction, Style of Stigma Interaction The style has...

Style of Stigma Interaction The style has been distinguished into two types: In open styles a stylar canal is present which is lined with a well-developed glandul

Mechanism of gastrulation, MECHANISM OF GASTRULATION - It is most im...

MECHANISM OF GASTRULATION - It is most impotant stage of embryonal development, in which single layered blastula converts into 2 or 3 layered gastrula. During this stage,

Calorific value, Calorific value is one of the most important characteristi...

Calorific value is one of the most important characteristics of a fuel. It judges the efficiency of fuel. Calorific value is defined as "the total quantity of heat liberated, wh

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd