How to prevent bovine cryptosporidiosis? Once Cryptosporidium bovine enters the calf, it will adsorb into the intestinal wall of the calf and multiply in large quantities, weakening the digestion and absorption capacity of the intestine, damaging the cells of the intestinal lining, resulting in symptoms such as calf water, dehydration, and anorexia.
Cryptosporidium adsorbed on the intestinal wall of calves also produces a large number of oospores, aggravating calf disease, and accompanied by the spread of calf manure to the environment for secondary transmission.
Calves will not show symptoms until 3-5 days after infection (watery, yellow stool), and symptoms such as calf water, dehydration and anorexia are easily confused with other diseases or "nutritious diarrhea". After infection, calves can excrete Cryptosporidium oocysts for up to 2 weeks or more.
Calves can excrete cryptosporidium oocysts through their feces 2 days after birth, meaning they are susceptible to infection after birth.
<h1 class="pgc-h-arrow-right" data-track="9" > treatment of Cryptosporidium bovis</h1>
So far, there is no effective anti-Cryptosporidium drug, but can strengthen the rehydration, prevent dehydration, generally with 5% glucose saline 1000 ~ 1500 ml, 250 ~ 300 ml of 25% glucose solution, 5% sodium bicarbonate solution 250 ~ 300 ml, disposable intravenous injection, 2 to 3 times a day, and then give oral rehydration salts to the affected animals. In clinical practice, drugs with certain efficacy are clindamycin, azithromycin, etc., which are treated with spiramycin abroad and treated with allicin capsules in China, which have a certain effect.
<h1 class="pgc-h-arrow-right" data-track="9" > prevention of bovine cryptosporidiosis</h1>
Because Cryptosporidium parasitizes the surface of the intestinal mucosa, humoral immunity does not play a complete protective role, but it plays a role in preventing re-infection.
For calves, timely feeding colostrum is the easiest and most effective way to prevent diarrhea in calves. Calves should be fed enough colostrum 0.5 to 1 hour after birth, 4 liters of high-quality colostrum within 12 hours of birth, the first 2 liters, and then 2 liters at intervals of 12 hours. At the same time, the pasture cannot blindly use low-quality milk substitute powder to reduce costs, otherwise once the disease occurs, there will be a bad situation of wholesale disease, which will have a far-reaching impact on the future development of the cattle.
The calves are transferred out of the delivery room as soon as possible after they are born. Cows and calves should be managed separately, not by the same keeper. Successful passive immunization of newborn calves may reduce the incidence of diarrhoea in newborn calves caused by Cryptosporidium.
In addition, pay attention to the disinfection of the environment, especially the delivery room and the newborn barn. Choose a disinfectant that kills cryptosporidium oocysts, such as 10% formalin, 5% ammonia. Disinfect and clean the surfaces of feeding equipment, buckets and barns (delivery rooms and calf barns) with diluted chlorine dioxide. Employees' boot soles and anything that comes into contact with sick calves and cow dung are also disinfected daily with chlorine dioxide.
Protect workers: Since cryptosporidium is a zoonotic disease, employees need to wear gloves and masks when exposing or treating sick calves to prevent infection.
The preventive measures of the cattle Cryptosporidium are here, pigs, cattle, sheep, chickens, ducks and geese see a doctor, and go to the animal husbandry hall!