The reproductive bronchitis of laying hens is mostly manifested in the first laying hens and the peak period. The chickens with normal appearance, good feed intake, and good feces show the following situations:

First, the appearance of symptoms:

1. No peak. Individual flock only reached 30-80% in 160-200 days.

2. Crown thick, bright red (redder than normal chickens) does not produce eggs, also known as false hens. 3. Sagging abdomen, a sense of volatility, similar to penguin-like. The incidence rate is about 10-20%.

Second, anatomical symptoms:

1. There are cysts in the fallopian tubes. The cyst fluid is clear, transparent and odorless. The cysts are of different sizes. There is also the possibility of developing 5-7 mature blebs, but there is no complete fallopian tube and it is impossible to lay eggs normally.

2. Some chickens have no ascites, there is a fallopian tube stenosis, blind or no fallopian tube. Normal fallopian tube 63-67cm, individual chicken less than 10cm.

3. The disease is infected on the 1-3 day old and has a transient respiratory symptom. No death but will affect future egg production performance.

Fourth, prevention:

1. Perform high-temperature filling and ensure that the temperature is constant and not lower than 35°C in the first three days. The birds were evenly distributed and did not show mouth breathing as a criterion. Since the temperature of winter brooding is not easy to control, the incidence of flock is higher.

2. Strictly sterilize contaminated chicken farms.

3.1-3 days old eyes with Re-H120-P26, 1-2 drops each. 10-20 days free.

To eliminate chickens in a timely manner, appropriate use of anti-virus and antibiotic drugs to control, combined with multidimensional drinking water to increase egg production rate.

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1:Barrier Film  Used for hay packaging,silage packaging.

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