1. The harm of parasitic diseases to dairy cows
In vivo, parasites compete for the nutrition of dairy cows, which reduces the feed nutrition and causes the milk production of dairy cows to decrease, thus the cost is greater than the income. The daily life of animals is affected by parasites. They can not sleep and eat well, and their physical and physiological conditions will be affected. Therefore, the quality of the dairy cow's dairy products will be greatly reduced. Also, the movement of parasites can cause damage to dairy cows, inflammation of organs or damage to interfere with the normal activities of dairy cows, and some may even cause death. Also, metabolites produced by parasites can cause many adverse reactions in cows and reduce the immune system function of cows.
On this basis, the mucosal damage caused by parasites makes it easier for other pathogens to invade the body and spread some other diseases. Also, parasitic diseases will hurt the reproductive capacity and physiological function of dairy cows. Many parasitic diseases are zoonotic, so in addition to causing great losses to the dairy industry, they will also greatly damage human health. And in actual production, calves and lactating cows are most vulnerable to damage. At the same time, the losses caused by parasitic diseases of these two dairy cows are the biggest, which can cause malnutrition, stagnation of growth and even death of calves. Lactating cows will have a decline in milk production, prone to miscarriage, infertility, stillbirth.
2. Common parasitic diseases in dairy cows
Coccidiosis in dairy cows is a parasitic disease caused by Eimeria Qiu and Eimeria Bovis. Its main symptoms are hemorrhagic enteritis, which usually incubates for 2-3 weeks, sometimes for more than one month. The onset of this disease is most acute. The onset period is usually 10-15 days. Occasionally, calves die within 1-2 days of onset. Initially, the cows were depressed, their body temperature was high or normal.
If they were cows, milk production would decrease. About a week later, cows become more depressed, often lying down, and their body temperature rises to 40-41 degrees Celsius. Later, cow feces showed black, body temperature dropped, and symptoms of anemia then cows gradually died. There are also some cows suffering from chronic diseases, which gradually improve within 3 to 5 days after the onset, but there are still some symptoms, which may last for several months.
Control or eliminate the source of infection. Every cattle breeder should take into account all aspects of the cattle he raises, and regularly repel the insects of the cows in his own cattle farm to achieve the purpose of prevention and treatment. Drugs can be made by accumulating fermented feces. After accumulated fermentation, feces can effectively utilize the heat generated by their fermentation to kill insect eggs and pathogens, and even reduce the number of feces and dehydration in a very short time.
Cut off the route of transmission of parasitic diseases. As a dairy farmer, we should strengthen the nursing of the living environment of dairy cows, and at the same time eliminate all kinds of insects in the air which may be used as bacterial vectors. It is also necessary to take good care of hygiene and regularly remove feed residues from cow pens to inhibit insect growth.
Therapeutic principles. Parasitic diseases are very important cluster morbidity of animal diseases. Once parasitic diseases occur in animal husbandry, they will cause huge economic losses. Parasites have a certain life cycle, which makes many parasitic diseases have symptoms of chronic diseases. Parasitic animals grow slowly under the influence of nutrient capture by parasites. Even animal products will be discarded. Parasitic diseases often occur chronically, without obvious symptoms and are easily noticed, so little attention is paid to them.
However, in areas with a high incidence of parasitic diseases, some parasitic diseases can also cause acute disease in animals, and often accompanied by numerous dead livestock and poultry. Sometimes some chronic parasitic diseases have high infection intensity, which can lead to numerous animal morbidity and death. Because all kinds of symptoms conform to the epidemic law, farmers can learn the knowledge of epidemic diseases and take comprehensive measures to prevent parasitic diseases, supplemented by prevention and control, to truly eliminate parasitic diseases.
Therapeutic regimen. Confrontation with parasitic diseases is a very complex process. Only by effective treatment of disease and livestock, prevention of infection and numerous eradication of pathogens, can parasitic diseases be effectively prevented and eliminated in dairy cows. Besides, because there are many parasitic larvae in the cow's feces, it is suggested that the cow's feces should be regularly pesticides. The most common method of insecticide removal of dairy cows manure is to place the cow's excretion in a fixed place, then accumulate and ferment in situ, and kill all parasites by the heat generated by organisms. This method can achieve the purpose of disinfection without the consequence of reducing the quality of fertilizer.