Fowl cholera, Biology

Fowl cholera

Fowl cholera, a highly contagious disease of poultry caused by Pasteurella multocida, was one of the first infectious diseases to be recognized by Louis Pasteur in 1880. The infection can range from acute septicemia to chronic and localized infection and in acute cases, very high morbidity and mortality that may reach up to

100%. Predisposing factors include high density and concurrent infections such as respiratory viruses. The disease is transmitted via oral or nasal route. The bacterium is susceptible to environmental factors and disinfectants, but may persist for prolonged periods in soil. Reservoirs of infection may be present in other species such as rodents, cats and possibly pigs.

P. multocida is non motile Gram-negative coccobacillus. Capsule is seen in freshly isolated culture. It can grow both aerobically and anaerobically. The bipolar nature of the bacteria is the characteristic feature on staining with methylene blue or Leishman' stain and is helpful in easy identification.

Symptoms and lesions: Ruffled feathers, loss of appetite, coughing, nasal, ocular and oral discharge, swollen and cyanotic wattles and face are the common signs. In some cases, diarrhoea, swollen joints, lameness may also be seen.  Sometimes PM changes are not seen or limited to hemorrhages at few sites but generally focal hepatitis, consolidation of lungs, suppurative pneumonia (especially in turkeys), cellulitis of face and wattles, purulent arthritis or enteritis are noted.

Diagnosis: Typical bipolar stained, dumbbell-shaped organisms are seen in blood smears/ impression smears. Isolation can be easily done by aerobic culture on blood agar and further confirmed with biochemical tests.

Prevention and control: Biosecurity, rodent control, hygiene and healthy diet are enough to prevent the disease. This is mostly opportunistic infection; special care is to be taken during stress or other respiratory viral infections.

Posted Date: 9/18/2012 8:33:06 AM | Location : United States







Related Discussions:- Fowl cholera, Assignment Help, Ask Question on Fowl cholera, Get Answer, Expert's Help, Fowl cholera Discussions

Write discussion on Fowl cholera
Your posts are moderated
Related Questions
What is the difference between spermatocyte I and spermatocyte II? The spermatocyte I (2n) undergoes the primary division of meiosis (meiosis I) originating two spermatocyte II

Q. Illustrate Physiological Evidence ? Physiological and biochemical evidence is providing data of increasing importance to plant systematic. Recently, it has become apparent t

What is Knot tying Once the suture is satisfactorily placed, it must be secured with a knot. The instrument tie is used most commonly in cutaneous surgery. The square knot is t

When the syndrome sets in at a rapid rate before the compensatory mechanisms become operative, acute heart failure develops. The examples are acute heart failure due to acute myoca

MECHANISM OF REGENERATION - T.H. morgan recognised 2 primary mechanisms - M o r ph o l axis Epim orphosis 1. Production of enti

Q. What are the respective functions of phospholipids, carbohydrates and proteins of the cell membrane? Membrane phospholipids have a structural function they form the bilipid

A newborn baby with a patent foramen ovale or a ventricular septal defect might be cyanotic (blue). Will a two-year-old with these defects also be cyanotic? Explain your answer.

Define Sample Titration - estimation of vitamin c in a solution? Take the given unknown solution provided to you in a 100 ml volumetric flask. Dilute the sample ascorbic acid s

Define Factors influencing the efficiency of bioconversion? amount of provitamin A presented to the 'cell, differential conversion by stereoisomeric form, and Vit

Mixed Mitral Stenosis and Regurgitation The most common cause for a combined lesion is rheumatic, Very rarely; it could be of congenital origin. Regurgitation in a stenotic val