Due to the large losses caused by diarrhea in pig farms, it is necessary to understand the causes of its occurrence in order to take effective prevention and control measures. This paper will be conducted through case analysis, on-site investigation and laboratory testing, etc., China Pig Network (www.comzhuwang.cc)** The causes of diarrhea in pig farms, providing practical prevention and control suggestions for pig farmers.
A large pig farm had a severe diarrhea problem, resulting in a large number of pig deaths. Through autopsy, it was found that the intestinal mucosa was damaged and the intestinal wall was thinned, accompanied by varying degrees of bleeding and inflammatory exudate. At the same time, the disease material was collected and sent to the laboratory for testing, and it was finally confirmed that it was caused by porcine epidemic diarrhea virus (PEDV) infection. Through the communication with the management of the pig farm through the China Pig Network, it was learned that the farm has many problems in pig introduction, feeding management, vaccination and other aspects. For example, pigs were not quarantined and quarantined when they were introduced, the feeding density was too high, the feed nutrition was not balanced, and the vaccination was not timely. These problems have led to a weakened herd of immunity and susceptibility to diarrhoeal viruses.
In order to get a more complete picture of the causes of diarrhea in pig farms, we conducted field surveys on multiple pig farms. The results of the survey showed that diarrhea occurred in pig farms of different sizes and under different feeding and management conditions. Among them, poor feeding management, poor feed quality, untimely vaccination, poor pig house environment and other factors are the main causes of diarrhea.
At the same time, we noticed that when diarrhea occurred, some pig farms took unreasonable measures, such as the abuse of antibiotics. These unreasonable ** not only can not effectively control the disease, but also may aggravate the condition of pigs, and even lead to death.
In order to further clarify the cause of diarrhea in pig farms, laboratory tests were performed. Through virus isolation, PCR detection and other technical means of virus isolation and PCR detection of the collected disease materials, we detected the presence of a variety of viruses, bacteria and parasites. Among them, porcine epidemic diarrhea virus (PEDV), porcine infectious gastroenteritis virus (TGEV), porcine rotavirus (RV), Salmonella, and Escherichia coli are the main pathogens causing diarrhea.
It is worth noting that some pig farms have co-infection with multiple pathogens when diarrhea occurs. In this case, it is often difficult to achieve the desired effect with a single prevention and control measure in China's pig breeding network, and comprehensive measures need to be taken for prevention and control.