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
Which of the following does NOT contain a guanidinium group Select one: a. Urea b. arginine c. creatine d. guanidinium ion

Define the Petrifilm (dry film) Method? An alternative method to the conventional SPC is a Petrifilm (dry film) method. It is a non-petri dish plating system where a layer of n

what is tissue

Exercise- Heat Production During physical activity heat production by exercise can to some extent substitute for heat generated by shivering. However, exercise also tends to

For the cross in Part B, predict the frequencies of each of the phenotypes in the F1 progeny, and determine the genotype(s) present in each phenotypic class. Complete the diagram b

Healthy human female X is 25 years old and not pregnant.  During the postovulatory phase of X's menstrual cycle,   A.  there are high blood plasma levels of LH and FSH.

What are the apical meristems? Which kind of plant growth does this meristem promote? The Apical meristems are those primary meristems found in the apex of the stem as well as

How to reduce calorie intake from fat? Efforts should be made to increase the nutrition knowledge of the general public through mass media. The foods with lower fat co

Phenology of Different Species The phenology of different species present in a community may differ from each other significantly. It is these phenological changes which give

Vegetative Development - Differentiation It is referred to as qualitative changes that lead to increased specialisation. For example, the formation of cells and tissues of roo