Prawn enteritis causes slow growth How to prevent prawn enteritis

Shrimp bacterial enteritis: caused by Escherichia coli or salmonella infection. The symptoms of diseased shrimp are: the digestive tract is red, the stomach is the most obvious, the midgut becomes red and swollen, the rectum (hindgut) becomes turbid, the boundary is not clear. The vitality of diseased shrimp was weakened, anorexia and slow growth. High incidence in spring and summer, caused by deterioration of water quality or spoilage of bait.

Shrimp enteritis

Prevention: ① cleaning pond disinfection. Before stocking shrimp seedlings, clean up the silt and disinfect them with quicklime to kill pathogens and reduce the incidence of disease. ② water quality regulation. Water quality regulation agents are commonly used to regulate water quality, prevent harmful substances from accumulating, and apply microbial agents to improve water quality and disease resistance of prawns. The transparency of water body is kept above 30cm, which is beneficial to the growth of prawns. At the same time of water transfer, sediment improvers were used at intervals to improve the sediment of shrimp ponds and inhibit the reproduction of harmful bacteria.

Treatment: add live bacteria microecological preparation to shrimp feed, 50 jin ~ 100 jin per bottle of 500 ml mixture for 3 ~ 5 days, or sprinkle in the whole pond, 1 bottle per mu.

Shrimp enteritis caused by ingesting cyanobacteria: it is difficult to digest after eating cyanobacteria, or some cyanobacteria contain toxins after digestion, resulting in shrimp poisoning. Late-stage diseased prawns are often infected with bacteria.

Control measures: ① prevention is the main prevention, and cyanobacteria control forms population dominance. ② water diversion to the bottom, to prevent cyanobacteria reproduction, to avoid the deterioration of the disease, water diversion measures refer to the above methods.

Treatment: same as the treatment of shrimp bacterial enteritis.