How to do calf diarrhea? What are the causes and prevention?

Calves are a hybrid breed. There are mainly Simmental cattle, Charolais cattle, Limousin cattle and other improved beef cattle as male parents, Luxi yellow cattle as female parents for cross improvement. What about calf diarrhea? What are the causes and prevention?

I. causes of diarrhea in calves

1. Environmental stress factors reduce the resistance of newborn calves

The structure and function of digestive organs of newborn calves are not perfect, coupled with the poor regulation of the central nervous system to the gastrointestinal tract, conditional pathogenic bacteria will multiply in large numbers under the induction of some adverse factors in feeding and management. at this time, the intestinal flora changes, especially the proportion of normal dominant bacteria such as Bifidobacterium and Lactobacillus to pathogenic Escherichia coli and enterotoxigenic Escherichia coli. Leading to the occurrence of diarrhea in calves.

two。 Environmental pollution of intensive cowshed

Intensive animal husbandry production not only leads to a sharp increase in the content of microorganisms and dust in the air inside and outside the animal house, which directly affects the health and production performance of livestock, but also leads to the spread of infectious and conditional infectious diseases and environmental biological pollution. It is reported that the air of the barn contains staphylococci, streptococci, aerobic spore-forming bacteria, Escherichia coli, Pseudomonas and molds. Studies have also shown that the total number of aerobic bacteria in the air of the barn is 31, 562 / m3, including non-pathogenic bacteria, pathogenic bacteria and selective pathogenic bacteria. High levels of selective pathogens can cause infectious conditional diseases in sensitive animals with the help of non-microbial factors. In the process of intensive animal production, selective pathogenic bacteria are more threatening to animal health than traditional infectious diseases.

3. Control of pathogen

The available data show that calf diarrhea is a disease caused by viruses, microorganisms, parasites and bacteria. Although there are vaccine preparations to prevent calf diarrhea, anti-rotavirus and anti-coronavirus vaccines often induce fulminant gastroenteritis in calves, and Escherichia coli has many serotypes. if the serotype of pathogenic Escherichia coli in cattle farm is not consistent with the serotype of bacteria used to make vaccine, the effect of preventing Escherichia coli is not ideal.

II. Comprehensive prevention and control measures of calf diarrhea

1. Increase the body resistance of calves, promote the rapid formation of normal colonies in the intestinal tract of calves, and improve the ability of intestinal colonies to maintain balance.

two。 Different ways were used to purify the environment in the house and reduce the content of air microorganisms (especially pathogenic microorganisms) in the house, so as to prevent calves from being infected with pathogenic microorganisms.

At present, strengthening ventilation and disinfection is the most commonly used method to reduce microorganisms in the barn. The common method of disinfection in the barn is spray disinfection or fumigation disinfection. Spray disinfection is often uneven and may also lead to an increase in humidity in the house; fumigation is more irritating and cannot be fumigated with livestock.

3. Use vaccines or veterinary drugs to prevent diarrhea in calves.

When using vaccine to prevent calf diarrhea in cattle farms, we should pay attention not only to the type of vaccine and the selection of appropriate bacteria, but also to the side effects of the vaccine. For Escherichia coli causing diarrhea in calves, attention should be paid to the isolation and identification of pathogenic Escherichia coli in large-scale cattle farms, and the vaccine made by the isolated strains can often achieve the desired purpose. It is best to do drug sensitivity test before using antibiotics to prevent and cure calf diarrhea.

4. Strengthen the feeding and management of calves.

Clean the barn regularly to ensure a quiet and clean environment; regularly feed high-quality feed and supply adequate clean drinking water; and properly supplement anti-stress substances before and after weaning.