What are the clinical symptoms of duck colibacillosis?

Because Escherichia coli is widely distributed in nature, healthy ducks are easily infected and become exotic infected ducks, so the incubation period is very different. In duck farms with poor environmental sanitation and extensive feeding management, the incidence and mortality of colibacillosis are high, mostly acute septicemia. For example, after the newly hatched ducklings get sick, they are weak, close their eyes, shrink their necks, have a large abdominal circumference, often have diarrhea, and most of them die of septicemia. After the onset, the older ducklings are listless, lose appetite, stand aside, shrink their necks to sleep, and often have sticky secretions in their eyes and nostrils. Some sick ducks excrete gray-green loose stool, have difficulty breathing, and often die of septicemia or physical exhaustion and dehydration. Adult sick ducks tend to lie down and are unwilling to walk. When standing, they can see that the abdominal circumference is swollen and drooping, which is penguin-shaped. There is a feeling of fluid fluctuation in the abdomen by palpation, and ascites flows out during puncture.