Analysis on Pathogenic Factors of Common Diseases of Rana chensinensis

Like other animals, the occurrence of frog disease is related to three factors, one is the internal factors, that is, the physical strength of the forest frog itself, the second is the pathogenic microorganisms, and the third is the external environmental conditions, including perceived factors. If there were no pathogenic microorganisms, even if the frog had a poorer physique, the forest frog would not theoretically get sick.

However, it is impossible without pathogenic microorganisms in the living environment of forest frog. In fact, it is impossible for forest frog to live under aseptic conditions, that is to say, there are a large number of microorganisms in the living environment of forest frog. However, in some areas, frogs do not get sick, and in some areas, forest frogs get sick; even in affected areas, not all forest frogs get sick, and there are also frogs that do not get sick, which shows that the disease of forest frogs is closely related to their own physical strength. Bad environmental conditions often cause a large number of diseases of forest frogs, which is also well known in frog raising practice.

To sum up, the occurrence of frog disease is affected by three factors: forest frog, pathogenic microorganism and environmental conditions. Therefore, the analysis of the etiology of forest frog disease, the prevention and treatment of frog disease should be based on this understanding.

The external cause is the condition, the internal cause is the basis, and the external cause acts through the internal cause. Eliminating pathogenic microorganisms, creating suitable ecological conditions for forest frogs and excellent feeding techniques are the theoretical basis and basis for the prevention and treatment of frog disease.

one. Environmental factors causing the disease of forest frogs tadpoles live in the water, young frogs and adult frogs live under the forest or in an artificially simulated ecological environment, forest frogs have a long overwintering dormancy period, and external environmental conditions, such as water temperature, air temperature and light, play an important role in the feeding, activity, growth and breeding of forest frogs. When the external environmental conditions for the survival of forest frogs change, it is bound to affect a series of life activities and metabolic intensity of forest frogs, which may cause the disease of forest frogs in varying degrees. The amount of dissolved oxygen in water is closely related to the survival of tadpoles.

The amount of dissolved oxygen in the water is low, the metabolic intensity is low, the physique becomes weak, it is easy to get sick, and even suffocate to death. The pH in the water also has a significant effect on the growth and development of tadpoles. When there is too much humus in the tadpole breeding pond, and when the residual bait is decomposed by microorganisms, harmful gases such as hydrogen sulfide, biogas and carbonate gas can be eliminated, which can cause tadpole poisoning. Young and adult frogs exposed to the sun and dry skin of forest frogs during hibernation can cause a large number of deaths of forest frogs.

two. The biological factors of frog disease can be divided into two categories: one is plant pathogens, such as viruses, bacteria, algae, etc., and the other is animal pathogens, such as protozoa, parasites, worms and so on.

three. The human factor of frog disease is due to improper treatment of artificial technology, which weakens the physique of forest frog, decreases its immunity, and causes the disease of forest frog. Improper density of sheep, single feeding and incomplete nutrition; feeding deteriorated bait, resulting in changes in water quality; breeding grounds without thorough disinfection, and frogs purchased from other places without disinfection, bringing in bacteria and parasites; did not remove diseased tadpoles and diseased frogs in time, resulting in the spread of bacteria causing repeated infection: forest frogs growth and development, reproduction and other stages can not be scientifically managed, but also can make tadpoles and adult frogs, young frogs disease.