Many shrimp farmers have encountered the problem that the South American white shrimp grows slowly during the farming process, but there are no large numbers of dead shrimp and no other abnormal symptoms. This can happen for a variety of reasons, one of which is easily overlooked, is shrimp microsporidium. How much do you know about shrimp microsporidiosis? The following is a brief analysis of it.
Shrimp microsporidium is a widely infected shrimp crab and other invertebrate eukaryotes, and microsporidium has a wide variety of species, is a shrimp parasite disease is difficult to cure, it mainly infects the shrimp liver pancreas, muscle tissue, some microsporidium not only parasitize shrimp muscle tissue, but also infect the heart, gills, stomach, liver and intestines.
Shrimp microsporidiosis, also known as "cotton shrimp", mainly infects the gonadal and striated muscles of shrimp, causing muscles to be white, opaque, loose and soft tissues, and lose elasticity, so some people call it milky white shrimp or cotton shrimp. Microsporidiosis is a chronic disease in which shrimp die after a period of illness, and healthy shrimp are mainly infected by feeding diseased shrimp.
Microsporidiosis is a more common and harmful chronic disease, which is more common in juvenile shrimp of 1-3 cm, but juvenile shrimp, juvenile shrimp and adult shrimp can be infected and sick. Sick shrimp swimming slowly, more floating swimming at the edge of the pool, the amount of food intake greatly reduced or even stopped feeding, growth stagnation, gradual weakening of the physique, severe cases of enteritis, muscle atrophy and liver and pancreas atrophy, will not lead to a large number of deaths of shrimp, the most obvious feature is that shrimp growth is slow (dry eating is not long), individual differences are large, and will be accompanied by white stool; although this disease is a chronic disease, but due to mixed infection with Vibrio, the pathogenic rate can reach more than 60%.
So far, microsporoides disease in the later stages of no specific treatment drugs, in the early detection can be through the control of insect outbreaks to achieve the purpose of reducing losses, in the later stage, the liver and pancreas and intestinal epithelial cells are destroyed, and then by controlling the disease, there is little significance. Therefore, the best idea for microsporidium is prevention-oriented, early detection and early treatment (early can also recover a lot of losses).
Preventive measures: thoroughly clean, expose and disinfect the pond before the shrimp fry are stocked, and after the water source enters the pond, the water body is thoroughly disinfected with safe and efficient disinfectants to kill the pathogens hidden in the pond environment; During the breeding process, feed is mixed with multi-bract eucalyptus essential oil, which can effectively prevent shrimp microsporidium.
Eucalyptus polyphytes essential oil, rich in 1,8-eucalyptin, monoterpenes, sesquiterpenes, alcohols, esters, aldehydes and ketones and other plant active ingredients, a variety of components synergistic, with strong penetration and permeability, can destroy the cell membrane structure of microorganisms, effectively inhibit the reproduction and growth of shrimp microsporidium. In shrimp farming production, regular mixing is fed lechang multi-bract eucalyptus essential oil, insect repellent instead of insecticide, prevention instead of treatment, can be well controlled microsporidium.
Eucalyptus multi-bract essential oil has been included in the EU feed additive certification catalogue, is certified green, safe, pollution-free feed additives, does not hurt shrimp, does not bad water, does not affect the shrimp feeding and growth! While taking eucalyptus multi-bract essential oil internally to deworm, it can also inhibit Vibrio bacteria in the body and improve the inflammation of enteritis, red body and other body inflammation caused by Vibrio infection.
Penaeus p. microsporidium infection rate is high, the harm is large, once in the later stage, there is no drug can be treated, can only dry wait for the pond, causing serious economic losses! So be sure to do a good job of prevention, do not wait for insects and then choose insecticides, shrimp are very sensitive to insecticides, commonly used insecticides in aquatic products can damage the shrimp body, prevention-oriented, safe insect repellent Lechang multi-bud eucalyptus essential oil is your best choice!
The source of the article is the official website of Shandong Longchang Dongbao.