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How to Diagnose Newcastle Disease in Chickens?

 

Diagnosis of Newcastle Disease in Chickens

Newcastle disease in chickens is an acute and severe infectious disease. The main external symptoms are: dyspnea, diarrhea, nervous disorder, rapid spread, and high mortality. Its pathogen is a virus, and all kinds of antibacterial and antibacterial drugs have no effect on it and lose its efficacy. Therefore, there is no effective treatment for this disease at present. There is only one way to control the occurrence of this disease, and that is to vaccinate chickens against Newcastle disease.

 

Diagram showing how to Diagnose Newcastle Disease in Chickens

What are the symptoms and diagnosis methods of Newcastle Disease in Chicken?

The specific symptoms and diagnosis methods are as follows:

 

1. The body temperature of sick chickens rises up to 43-44°C, which is manifested as loss of appetite, lethargy, lack of movement, outliers, closed eyes and necks, and loose feathers. 

The head droops, the wing tail droops, and some sick chickens are still in a lethargic state. 

The body temperature of the sick chicken continued to drop in the later stage, the body became cold, and soon died.

 

2. The cornea of ​​sick chickens is cloudy. The cockscomb and beard are dark red or purple-black, and occasionally the head is swollen.

 

3. The oral secretions of the sick chickens increased, and a large amount of mucus was accumulated. 

In order to remove the mucus, the sick chickens shook their heads from time to time and swallowed frequently. 

When the sick chicken was brought up, the mucus flowed out of the mouth in large quantities.

 

4. Difficulty breathing, often straighten the head and neck, open mouth to breathe, and make a "coo" sound. The crop is inflated and inflated.

 

5. Diarrhea, yellow-green feces, sometimes bloody, foul smelling. Stop laying or laying soft shell eggs.

 

6. Nervous symptoms in chickens with a long course of disease: movement disorder, unsteady gait, circling on the ground, head leaning back or bending to one side, and finally semi-paralysis or total paralysis.

 

7. The most acute cases of chicken Newcastle disease are rare, with an acute course of 2 to 5 days

A chronic course of about 10 days, sometimes as long as 20 days, or even 1 to 2 months. 

Chicks have high susceptibility, short disease duration and high mortality. Acute type mortality can be as high as 90% to 100%, chronic type mortality is generally about 50%.

 

8. Chicken Newcastle disease is an acute and severe infectious disease that spreads rapidly and generally has no cure. Therefore, in order to prevent this disease, in addition to injecting Newcastle disease vaccine, it is necessary to observe the chickens in time. Once the disease is found, it should be buried immediately and not edible, so as to prevent the disease from spreading, uncontrollable, and causing greater economic losses.

 

 

How to keep chickens warm in winter and spring?

Chicks have strict temperature requirements. Low temperature will cause chicks to freeze to death, crush, catch cold, pullorum, malabsorption of egg yolk and slow growth. Insufficient temperature of medium and large chickens is not only easy to cause diseases. And the consumption increases. 

Chickens grow slowly. Therefore, ensuring the temperature required by flocks in winter and spring is the key to the success of raising chickens. Farmers should pay attention to:

 

1. The temperature requirements for normal growth of chickens

 

1). The first week: 1 to 3 days of age should not be lower than 33 degrees, and then drop by 1 degree every two days, and the temperature should be above 31 degrees in one week (the No. 1 chicken and the bamboo silk chicken should increase by 1 to 2 degrees accordingly).

 

2). From now on, it will drop 2 to 3 degrees every week, and it should not be lower than 20 degrees at the age of 30 days.

 

3). Medium and large chickens (chickens over 30 days old) should be above 18 degrees, and the minimum should not be lower than 15 degrees. There is no dewarming period in winter.

 

2. During the heat preservation process, it is necessary to "see the chicken and apply the temperature".

 

Whether the temperature is suitable depends on the sleeping state, call, spirit, food intake, and liveliness of the chickens.

 

1). If the chickens are evenly dispersed, lively, cheerful and soft, their necks and feet are straight when they sleep, and their appetite is strong, it means that the temperature is appropriate.

 

2). If the chickens stay away from the coal stove, open their mouths to breathe, and drink water frequently, it means that the temperature is too high.

 

3). If the chickens gather around the coal stove and crowd together and make a sharp cry, it means that the temperature is too low.



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