Prevention and Control Methods and Technical Key Points for Pig Cold Diarrhea

The root cause of pig "cold diarrhea" disease has now been confirmed to be infection of pigs with transmissible gastroenteritis and epidemic diarrhea, and pigs are prone to this disease when the weather turns cold. Once a pig contracts this disease, in addition to severe diarrhea and pig death (mortality of suckling pigs can reach as high as 100%), it also seriously affects pig growth and increases the culling rate of pigs. In order to effectively control the occurrence of this disease, the pathological characteristics and prevention and control measures of the disease are introduced as follows:

1. Pathological characteristics: Porcine transmissible gastroenteritis and porcine epidemic diarrhea are highly contagious viral diarrheal diseases that can infect pigs of all ages and cause disease, especially piglets within 10 days of age, whose morbidity and mortality rates are both very high. The main symptoms of affected pigs are vomiting, severe diarrhea (watery diarrhea resembling spraying) and dehydration. In addition to affected pigs, after the virus contaminates feed, drinking water, air and other media, it infects pigs through the respiratory tract and digestive tract. Other factors such as poor raising conditions, a monotonous diet, sudden feed changes, a cold and damp environment, and long-distance transport can all promote the occurrence and spread of this disease. The course of this disease is generally 3 to 7 days.

2. Prevention and control measures:

First, do a good job of isolation and disinfection measures for pig farms in connection with the introduction of externally purchased pigs and during epidemic seasons. According to the situation of affected pig farms over many years, most cases are caused by carelessness in introducing breeding stock or purchasing piglets, and in addition, during epidemic seasons pig farms fail to carry out measures such as disinfection, resulting in the introduction of exogenous viruses. The prevention and control of porcine transmissible gastroenteritis and epidemic diarrhea mainly relies on prevention. Second, make good use of the combined vaccine for transmissible gastroenteritis and epidemic diarrhea in breeding pigs to enhance resistance to this disease, starting use in September and October each year. To ensure the production of a high level of antibodies, revaccinate once 25-30 days after the first immunization; the pig's Houhai acupoint is the best immunization site. Third, if this disease occurs on a pig farm, first isolate the affected pigs and strictly disinfect the contaminated environment. Stop suckling or feeding the affected pigs, provide a cold-proof and warm environment that is clean and dry, give sufficient clean drinking water, and minimize various stresses as much as possible. Generally, symptomatic treatment is adopted, such as measures including fluid replacement, astringency, antidiarrheal treatment, and correction of acidosis, as well as methods to control secondary infection.