7 Tips How to control Newcastle disease in poultry

Newcastle disease is a viral avian infection caused by the virulent Newcastle disease virus.

Newcastle disease is also known as NDV, a polymorphic virus, which means it can build complicated code that allows it to “shapeshift,” or change its characteristics and create new versions of itself, to avoid detection and bypass immune defenses while maintaining the same critical operations after each infection.

How to control Newcastle disease in poultry

Virulent NDV strains (NDV) are common in most parts of Asia, Africa, and certain North and South American countries. Other countries, such as the United States and Canada, are free of such strains in poultry and safeguard their position by enforcing import bans and prohibitions by eradicating infected birds.

What causes Newcastle in poultry?

The mode of transmission of the disease is through ingested contaminated feed and water. Viruses are shed by infected birds in their exhaled air, respiratory secretions, and excrement during incubation and clinical stages.

The viruses can also be found in eggs laid and throughout the carcass during acute NDV infections. The incubation period of NDV is generally considered to be 4-6 days.

What are the symptoms of Newcastle disease in poultry?

Newcastle disease is a widespread infection that most commonly appears as a respiratory illness, but can also present as neurological problems or diarrhea.

Clinical signs of Newcastle disease are;

  1. Coughing
  2. Diarrhea in birds (feces are mostly green)
  3. Paralysis of wings and legs
  4. Complete paralysis,
  5. Oedema in head and eggs
  6. Cessation in laying of eggs
  7. Circling motion.
How to control Newcastle disease in poultry
ISA brown hen with spread wings. (Photo by: Andia/ Universal Images Group via Getty Images)

Can chickens survive Newcastle disease?

The severity is determined by the virulence of the invading virus and the host’s susceptibility. In susceptible birds, such as chickens, mortality varies depending on the virus strain, the host’s immunological status and age, the presence of exacerbating organisms, and environmental conditions. Also, young birds are highly susceptible to the disease. How to select the best broiler for production 101 What are the Functions of Vitamins in Poultry? 5 Major Facts

How to control Newcastle disease in poultry
HOLIT, ISRAEL – MARCH 19: Dead turkeys lay inside a quarantined kibbutz on March 19, 2006 in the southern Israeli farming community of Holit, Israel. Thousands of birds have been killed to try and control the first outbreak of the deadly Bird flu virus. (Photo by Paula Bronstein/Getty Images)

Oil-adjuvanted inactivated vaccines are commonly used inactivated vaccines. The current vaccines do not provide complete immunity to Newcastle disease, but rather elicit an antibody response.

Vaccination begins as early as day 1–4 of life for healthy chicks. Delaying immunization until the second or third week, on the other hand, eliminates maternal antibody interference with an active immune response.

Newcastle disease symptoms in humans

When there is a high level of exposure and close contact with Newcastle disease, there is a possibility of this viral disease being transmitted to humans. Newcastle disease when contracted by humans can cause transitory conjunctivitis.


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