In recent years, poultry diseases have become increasingly complex, which has brought certain difficulties to the epidemic prevention work. After the hot summer, autumn comes, and the temperature difference between day and night is large, easy to cool down windy weather, and sometimes rainy. Therefore, it is easy to produce stress responses in poultry, and the body's disease resistance declines, thereby inducing a variety of diseases, affecting the development of the chicken industry and causing economic losses to farmers.
According to the characteristics of the autumn climate,
farmers should pay special attention to the prevention and treatment of the
following diseases:
Flu (Influenza).
If the poultry is sick with influenza, the
respiratory symptoms are abnormal, the chickens have a small snoring, can not
be heard during the day, and it is obvious to hear after the lights are turned
off at night, there is a sharp sound, breathing difficulties. The chickens will
also have a small number of listless spirits, pale faces, reduced intake of
food and water, decreased egg production, and slowed-down growth. Yellow-green,
pale stools appear.
Liver diseases
The liver is the largest chemical plant in the poultry body.
Its main functions include carbohydrate metabolism, lipid metabolism, protein
metabolism, glycogen storage, trace elements and vitamins, blood filtration,
toxin removal, and bile secretion. There are many causes of liver disease, such
as adenovirus inclusion body hepatitis, mainly manifested as anemia, jaundice,
liver enlargement, paleness, brittle, the surface has different degrees of blood
spots and hemorrhagic spots, the liver faded brown to yellow. Mycotoxins can
also cause liver lesions in poultry, amyloidosis, yellow staining, mottled,
blood spots, etc. There are additive and synergistic effects between several
mycotoxins so that the virulence is enhanced. E. coli, Salmonella, Clostridium
Wilson, mycoplasma, and so on will also cause liver lesions, because in the
growth and reproduction of the bacteria will continue to produce external
toxins, after death to produce endotoxins, these toxins are proteins, all need
to detoxify the liver to detoxify, so it is easy to cause liver disease.
Gastrointestinal diseases
Necrotizing enteritis is one of the most harmful intestinal
diseases in the poultry industry. Recent data from some countries in the European
Union show a marked increase in mortality in flocks with acute cases of
clostridium perfringens, with losses of up to 1% per day, compared with an
incidence of around 3-10%. Necrotizing enteritis usually occurs suddenly, and
sick chickens often die suddenly without obvious symptoms. The course of
intestinal disease is slightly longer, and you can see that the sick chicken is
depressed, the feathers are rough, the appetite is poor or abandoned, and the
stool is black or mixed with blood. If the treatment is timely, it can stop in
1-2 weeks.
Respiratory diseases
Poultry respiratory diseases are prone to infectious
rhinitis, infectious bronchitis, and so on. There are many reasons for the
respiratory disease of chickens, the autumn climate is changeable, the
temperature difference between day and night becomes large, and the chicks are
prone to cold, resulting in mycoplasma disease and respiratory symptoms. Sick
chickens show symptoms of runny nose, sneezing, and facial edema. Chicken farms
need to do a good job of hygiene, timely ventilation, reduce ammonia, and
sulfur dioxide in the chicken house, but also pay attention to heat
preservation, and reduce the occurrence of colds.