There is a common fungus in the flock, which looks mild, but is actually very fierce, you know?
E. coli disease is a conditioned pathogenic bacterium, when the sanitary conditions are poor and the level of feeding management is low, it is easy to cause the occurrence of E. coli disease. E. coli is very resistant to the environment and can survive for a long time in feces, soil, and dust in chicken coops. Feeding management, stress, or other infectious agents can be a predisposing factor for E. coli disease.
E. coli is a permanent bacteria in the intestines of poultry and can be divided into two categories: pathogenic and non-pathogenic. Avian pathogenic E. coli is a conditional pathogenic bacterium caused by a variety of serotypes of pathogenic E. coli, including E. coli balloonitis, Escherichia coli sepsis, Escherichia coli umbilitis, salpingitis, peritonitis, and Escherichia coli granulomatosis.
Typical symptoms of avian E. coli disease are pericarditis, perihepatitis, balloonitis, peritonitis, salpingitis, Escherichia coli granulomatosis, and umbilitis.
E. coli disease is infected by egg infection, respiratory infection and digestive tract infection. Chicks and young chickens are mostly acute septic E. coli, and adult chickens are mostly balloon and pericarditis, perihepaticitis.
E. coli sepsis occurs frequently in broilers for about 30 days, especially in winter, with a high incidence, and the death rate is often 5%-20%, and the severe one can reach 50%. Chicks are also more frequent in the summer, and sick chickens are less energetic and less feeding; The sick chicken's abdomen is enlarged, and yellow-green loose stools are discharged. Anatomical symptoms: fibrous pericarditis, turbidity of air sacs with cheese-like exudate.
Chick yolk sac infection with umbilitis is due to the fact that the E. coli in the eggs come from the ovaries and fallopian tubes of the breeders or from eggs contaminated with feces; The E. coli in the eggs multiply during the incubation process, resulting in a decrease in hatching rate, weak hatching chicks, malabsorption of yolk, umbilitis, and the discharge of white, yellow-green stools; Enlarged abdomen, death 2-3 days after birth; Even chickens that are resistant to it are stunted.
Peritonitis in laying hens develops from air blastitis and is sometimes caused by chronic salpingitis. When salpingitis occurs, the fallopian tubes become thin and filled with foul-smelling cheese-like substances, blocking the fallopian tubes and causing the released eggs to fall into the abdominal cavity and cause peritonitis.
When the level of feeding and management declines, the sanitary conditions are not up to standard, and various stressors exist, resulting in a decrease in the resistance of chickens, and E. coli will parasitize in the intestine, causing thinning, diarrhea, intestinal mucosa shedding, and overfeeding. Sick chickens have droopy wings, depression, diarrhea.
If the flock first infects Mycoplasma, it will cause damage to the respiratory mucosa and later secondary E. coli infection. In the early stage of the disease, the chickens will have a sound and coughing sound, and as the disease develops, the chickens will then develop air cystitis and pericarditis.
Subcutaneous infections in flocks can also lead to the development of E. coli disease (vaccinations or trauma) and the spread of bacterial infections due to damage to the epidermis, causing inflammation in these areas. There are also some viral infections that cause swelling of the head due to secondary E. coli, which is also common with swollen head syndrome, swelling of the eyes and the entire head, and a jelly-like yellow liquid under the skin.
Preventive measures: do a good job in environmental sanitation and disinfection, prevent excessive feeding density, do a good job of ventilation and ventilation of the pen, and regularly carry out disinfection of chickens.
