The intestinal diseases of Litopenaeus vannamei

The pollution of water sources and ponds caused by the people using antibiotics, chemical pervasive disease caused intestinal disease in Litopenaeus vannamei became more difficult to control. We would like to summarize some information about this disease to her concern!

The gut of Litopenaeus vannamei

They are the most important organ of Litopenaeus vannamei and they have very simple constitution so they are easy to be sensitive to diseases, especially intestinal diseases on Litopenaeus vannamei!

The polluted environment allowed Vibrio bacteria to spread rapidly and enter the intestinal tract, resulting in necrotizing enterocolitis from wounds caused by the Gregarines group, resulting in white or light yellow spots on the intestinal wall, Leading to white fecal disease. In addition, intestinal disease in the vannamei shrimp is caused by shrimp eating toxic algae in the pond, which secretes the enzyme to paralyze the intestinal epithelium, causing intestinal inability to absorb food and shrimp. When infected, shrimps will die to the dead and also the last stage difficult to treat, if not, then also cause great damage, shrimp are at risk of liver atrophy and whistle.

The manifestations of intestinal diseases in Litopenaeus vannamei are as follows:

– Shrimp significantly reduced the diet.
– Shrimp eat less slowly.
– Prawn necrotic, red intestine, dilute intestines make shrimp can not absorb food.
– The shrimp intestinal tract is cut into sections or there is no food in the intestinal tract.
– Shrimp fauna is broken, the curve is bent.
– Food in the intestinal tract does not move when it shakes the body.
– When checked, shrimp paste is not easy to disintegrate, short, pale color other than normal color

Causes of intestinal disease in Litopenaeus vannamei:

Aquaculture ponds are rich in organic matter.
The shrimp intestinal tract is invaded by bacteria, which cling to the mucous membranes of the intestinal tract, so that at this site the nutrients can not be absorbed, so there is often gaps in the intestinal tract when observed under the shade. sunshine.
Mycotoxins also cause the same signs on the gut of the gut.
Shrimp feeding irregularly, Litopenaeus vannamei abandoned eating causes intestinal disease.
Prevention and treatment solutions for intestinal diseases in Litopenaeus vannamei

Choose specialized feed for shrimp, feed quality, full of nutrients. Shrimp feed the right size for each stage, with the right amount of food and not excess. Food must be well preserved, not moldy, toxins.

When shrimp does not have intestinal disease

Although shrimp do not have intestinal disease in Litopenaeus vannamei, the farmer still needs to take measures to prevent Litopenaeus vannamei from eating.

– Keep a close watch on the food; Not to excess. When visiting the shrimp should check regularly for timely detection.

– Periodically use microorganism to disintegrate organic humus in the pond, clean the pond, limit the growth of harmful bacteria.

– If the pond water is too polluted, the treated water should be gradually changed from sedimentation ponds, with no more than 20% pond water change. Then loosen the lime to keep the pH and alkaline

– Addition of intestinal enzymes to shrimp feed, health improvement for shrimp with regular vitamin and C products (shrimp 7 days / time, shrimp 5 days / month, shrimp over 50 days Age 3 days / time).

 – Reduce food intake by 70%. Use safe antiseptic such as vircon, iodine to disinfect the pond. Then apply bio-product to restore micro-organisms in the pond.

Intestinal antibiotic for shrimp

– Use antibiotics to treat intestinal diseases in Litopenaeus vannamei: use one of the following formulas:

Formula 1: Take Cotrim and Metionin for one week. The first three days of Cotrim + Metioninn = 3 + 2 (tablets / 1 kg of feed), feeding twice a day. From day 4 onwards, Cotrim + 2 Methionine (pellets / kg of food) is reduced to 2 Cotrim + 1 kg feed and can gradually increase the amount of food when the shrimp return.

+ Formula 2: 48% of Bio Sultrim 10 ml / kg feed, 7 days of feeding or 50% of oxytetra Bio dose of 1 g / kg of feed, in 5-7 days.

+ Formula 3: Use antibiotics Prawnox, Daitrim, Gregacin (according to the manufacturer’s instructions).

+ Can use garlic oil, garlic extract and herbal extracts to prevent and treat intestinal diseases for shrimp.

– After antibiotic BIO ZYME for Shrimp or BIOTIC for Shrimp for at least 7 days to recover the shrimp intestinal microflora.

– After the shrimp return, disinfect the pond again and 3 days after high doses of micro-organisms for shrimp pond and increase the maximum aeration.

– Strengthen intestinal microbiotics when shrimp has recovered (because when shrimp are eating drugs, do not use intestinal enzyme) and enhance the health of shrimp by C, multivitamins.

Actually, this is a common disease in shrimp, so they do not have to worry, there are cases such as bony cases in Litopenaeus vannamei, diseases that prevent shrimp from eating too much.

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