What are the three types of swine colibacillosis in clinic? How to prevent and cure it?

Porcine colibacillosis is a group of intestinal infectious diseases of piglets caused by pathogenic Escherichia coli. Clinically, it is characterized by enteritis and enterotoxemia. Swine colibacillosis is prevalent all over the world and is the most common infectious disease of piglets. Due to different serotypes and age of sick pigs and different clinical manifestations of the disease, it is clinically divided into three types of piglet yellow scour, piglet white scour and piglet edema disease.

① yellow dysentery of piglets-also known as early-onset colibacillosis of pigs. It is an acute highly lethal intestinal infectious disease that occurs within a few hours to a week after the birth of piglets. It is characterized by severe diarrhea, yellow or yellow-white watery feces, and rapid dehydration and death. The most important route of infection is through the contamination of the sow's nipple and skin, piglets through sucking or adding sow skin, ingestion infection. Newborn piglets are generally healthy and often12Hours later, piglets with yellow excrement were found, from1-2The head begins and soon spreads to the whole litter, with the highest mortality rate being after birth.24About hours, from the discharge of pasty light yellow or grayish yellow feces, followed by watery diarrhea, feces mixed with small bubbles, fishy smell, some containing curd small pieces, severe anal sphincter relaxation, fecal incontinence, and finally dehydration and death, but the sick pig has no vomiting. Congestive and hemorrhagic lesions occur in the intestine, and these changes are most severe in the duodenum. Severe degeneration of mesenteric lymph nodes.

The disease is mainly clinical diarrhea, so it should be distinguished from other diarrhea diseases of piglets, especially with piglets red dysentery and porcine infectious gastroenteritis. Piglet red dysentery is caused by Clostridium welchii and is characterized by red mucous feces. Porcine transmissible gastroenteritis diarrhea can occur in pigs of various sizes. When the disease occurs in pigs, it quickly affects the whole group and has severe diarrhea. In addition to the death of piglets, other pigs recover within a few days.

The prevention and control of the disease is mainly to avoid the introduction of breeding pigs with the disease. Disease-free pig farms should pay attention to preventive measures at ordinary times. Before the sow lactates the piglets, squeeze a little milk from each nipple to flush out the bacteria in the nipple hole, and then use it again.0.1%Potassium permanganate wipe the nipple, breast and other parts of the skin, do a good job of column house hygiene, let the pig eat colostrum as soon as possible. Drug prevention is used in piglets after birth in the whole litter with oral antibiotics3Day. Therapeutic drugs available sulfadiazine, gentamicin, neomycin sulfate and so on. Also available vaccine immunization, mainly piglets Escherichia coli diarrheaK88-LTBGenetically engineered live bacteria.

② piglet white scour-piglet white scour is also a common diarrhea disease of suckling piglets, which is characterized by milky white or gray white slurry with fishy odor, with high morbidity and low mortality. The disease is mainly caused by Escherichia coli, the actual observation, some non-bacterial causes can also cause white scour of piglets, the two are interrelated and influence each other. Escherichia coli widely exists in the pig environment, mainly occurs in10-30Day-old piglets,2-3Weeks had the most cases,7within days or30More than days of the disease less. The disease can occur in all seasons of the year, but in early spring, severe winter, hot and abrupt climate change. The treatment was not timely, the condition worsened, the performance was emaciated, the appetite was abandoned, the road was unstable, and the chills died. Dead pig gastric mucosa flushing swelling, to the pyloric part of the most obvious, severe cases have bleeding point. Timely treatment, the prognosis is good. Treatment of drugs with yellow scour of piglets.

③ piglet edema disease, also known as pig gastrointestinal edema, is an acute and fatal disease of weaned piglets caused by pathogenic Escherichia coli toxins. Clinically, it is characterized by general or partial paralysis, ataxia, and oculofacial edema. The incidence is5%-30%. The disease is endemic, often limited to certain pig herds, not widely spread. More common in the spring and autumn two seasons. mainly after weaning1-2Zhou's piglets suddenly occurred. Some pigs made circular movements or barked blindly and suddenly jumped forward. When some pigs were stimulated or caught, they were shocked, screamed hoarsely, fell to the ground, and swung their limbs like swimming. Edema in some parts of the body surface is the characteristic symptom of this disease, which is common in the eye face, conjunctiva, gingiva, and sometimes affects the neck and abdominal subcutaneous region. The course is short for a few hours, long7More than days, the fatality rate is about90%. Salt laxatives are added to the feed for sick piglets.2days, followed by kanamycin, neomycin sulfate or streptomycin sulfate, daily2Times, continuous injection2-3Day. This disease is mainly comprehensive, symptomatic therapy, the initial use of sodium selenite, vitaminEAnd symptomatic treatment, have certain effect.