Avian Escherichia coli, the pathogen is a small Gram negative bacterium, with medium virulence, can move, has no spores, and has bacterial antigen () and antigen. According to their different, K and H, they are classified into many different serotypes and variants. So far, 159 kinds of 0 antigen, K99 kinds and 50 kinds of antigen have been found. There are four common serotypes: 01, 02, 078 and 035. Because of their different serotypes, the symptoms are also various. This bacterium has strong resistance to the external environment. It is inactivated at 60 ℃ for 15 minutes, highly sensitive to phenol and formaldehyde, and can be killed by general disinfectants such as double chain quaternary ammonium salt toxic oxyacetic acid.
Chang Gankang: stubborn colibacillosis
Epidemic characteristics: The disease is susceptible to chickens. Chickens of all ages can get sick, but chickens within 4 months of age are more likely to get sick.
Chang Gankang: stubborn colibacillosis
Escherichia coli granuloma is clinically without any characteristic symptoms. It is generally characterized by depressed spirit, drooping wings, fluffy and dull feathers, weight loss, weakness, pale crown and beard, decreased appetite, slightly elevated body temperature, thirst, gray and white thin feces, and high mortality, sometimes up to 50%.
Chang Gankang: stubborn colibacillosis
