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

Conduct of perfusion-cardio pulmonary bypass, Conduct of Perfusion :  At t...

Conduct of Perfusion :  At the beginning of the bypass, the pump output is usually kept at 2.4 litres per meter per minute. On coming off bypass, the flow is gradually reduced til

Gills - respiration, Gills - Respiration Gills are highly vascularise...

Gills - Respiration Gills are highly vascularised extensions of gas exchange membranes. The simple type may be extension of the body surface as in sea-slugs, sea stars and ma

Standardization of copper sulphate solution, It involves the standardizatio...

It involves the standardization of copper sulphate solution. This is same as done in the previous activity. 1)  Pipette accurately 5 ml of Solution A and Solution B in conical f

What do you understand by herbarium ethics, Q. What do you understand by He...

Q. What do you understand by Herbarium ethics? You should also know that herbaria provide us with policy statements including such information as 1) filing arrangements, 2) res

Explain working of dietitians and nutritionists, Dietitians and nutritionis...

Dietitians and nutritionists Dietitians and nutritionists, who are associated with hospitals and clinics generally have regular work hours. At times, they may be required to wo

Release of microspores, Release of Microspores Up to the tetrad stage...

Release of Microspores Up to the tetrad stage, there is no cellulosic wall around the microspores. As you will come to know in the next unit, a unique feature of the pollen i

Disorders of lower respiratory tract, DISORDERS OF LOWER RESPIRATORY TRACT:...

DISORDERS OF LOWER RESPIRATORY TRACT: The lower respiratory  tract infections  tend to occur most frequently in young children who have not developed resistance  to infectious

The difference between plasmalogen and glycerophospholipids, What is the st...

What is the structural difference between plasmalogen and other glycerophospholipids? What physiological advantage arises from this structural difference?

Trichomonas vaginalis - protozoan, Trichomonas vaginalis - Protozoan T...

Trichomonas vaginalis - Protozoan This cosmopolitan protozoan lives exclusively in the female vagina and male urethra or prostate. It causes a mild disease called trichomonas

Human skeleton, what are the main coponents of human skeleton?

what are the main coponents of human skeleton?

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