First aid measures after poisoning in silkworm breeding

Since May 2006, sheep in some large mutton sheep breeding parks and some mutton sheep farmers in our county have often suffered from liver bdellosis (fascioliasis). The disease is characterized by the parasitism of adults of Fasciola in the liver and bile duct of sheep, causing acute or chronic hepatitis and cholangitis with symptoms such as mandibular swelling, lack of eating, dysentery, anemia, and severe poisoning and malnutrition, affecting growth and development. The quality of wool and meat decreased significantly, a large number of livers were abandoned, and even caused the death of a large number of sheep, resulting in great losses.

First aid measures after poisoning in silkworm breeding

1. Pathogen

The pathogen of sheep liver leech disease is trematodes, which is parasitic in the liver and bile duct of sheep. The worm is flattened, 20-35 mm long and 5-13 mm wide. The fresh live worm removed from the bile duct is reddish brown, fixed and gray-white. Its front end shows a conical process, the base becomes wider, the shoulder gradually narrows, and there are many small thorns on the body surface. Two branched testicles are arranged in the middle and back of the worm body.

2. Symptoms

The diseased sheep showed depression, loss of appetite, slow ruminating, elevated body temperature, edema in eyelid, lower jaw, chest and abdomen, dyspnea, rapid pulse, salivation in varying degrees, snoring, arrhythmia and occasional diarrhea. When the course of the disease continues, appetite tends to disappear, showing catarrhal enteritis, mucosal pallor, anemia. The coat of sheep is rough, dull, brittle and easy to break, with local depilation. During liver percussion, the semi-voiced area was enlarged and the sensitivity increased, and some cases died 3-5 days after symptoms.

3. Changes in anatomical examination

The dead sheep were emaciated and anemic, especially in the liver and lung. The liver is bleeding and swollen, with dark red cords up to 2 to 5 mm long. when the section is extruded, a dirty yellow sticky liquid flows out, and the liquid is mixed with larvae. Those who die as a result of particularly serious infection can be seen with peritonitis and sometimes massive bleeding in the abdominal cavity; the mammary membrane is pale. In chronic cases, the lesions of the liver are grayish white, the surface is irregular, the texture hardens, and the bile duct is enlarged, filled with grayish-brown bile and worms. When you cut off the bile duct, you can hear "click!" Snap! " The Voice of. The surface of the liver shows a zigzag cord, and the wall of the tube is thick and hard when touched. Some parts of the lungs have localized hard nodules ranging from walnuts to eggs with dark brown semi-liquid contents; there are 1 or 2 living or semi-decomposed worms. The cyst of the nodule is calcified connective tissue. The color of the lung surface is normal.

4. Laboratory inspection

According to the routine aseptic materials such as liver and lung of sheep, the bacteria were isolated and cultured, and the worm body was found to be in the shape of flat leaf.

5. Diagnosis

According to epidemiology, clinical symptoms, autopsy changes and laboratory tests, sheep liver bdellosis was diagnosed.

6. Prevention and treatment

① prevention should strengthen the feeding management and improve the sanitary conditions. The sheep house and its surrounding areas were disinfected with Ding iodine disinfectant once a day for 3-5 days to keep the environment quiet so as to reduce stress reaction.

② was treated with thiodidichlorophenol (bithionol) according to 35 mg / kg body weight, once a day for 3 days. Vc, electrolyte and oral rehydration salts were added to drinking water to reduce stress, supplement nutrition, and be treated with traditional Chinese medicine at the same time. The formula: 9 grams of sappan wood, 9 grams of penetrating value, 9 grams of betel nut, 9 grams of gentian grass, 9 grams of Aristolochia manshuriensis, 9 grams of alisma alisma, 6 grams of Magnolia officinalis and 6 grams of cardamom. Get rid of the dregs and take it all at once. Use it for 3 days. After one course of treatment, the cure rate was more than 95%.

7. Summary

① repels worms regularly to prevent healthy sheep from swallowing metacercaria in spring and autumn. The feces of diseased sheep should often be treated by composting fermentation to kill eggs and avoid spreading eggs in feces. Prevent sheep from swallowing metacercaria. Do not build the sheep house in low wet areas, do not graze on wet pastures with trematodes, do not allow sheep to drink dirty water and stagnant water in ditches, and mow higher when mowing on wet pastures. Otherwise, the cut grass should be stored for more than 6 months for feeding.

② quarantine should strengthen veterinary health inspection. Sheep livers that are seriously infected with Fasciola should be abandoned. For slightly infected livers, infected parts should be discarded. The discarded liver is boiled and used as feed for other animals. Sheep transferred from other places, some of which are in a state of waiting for worms, can be transferred in only after parasitology examination is carried out before transportation and confirmation of health.

Does sericulture make money?

Generally speaking, the prospect of large-scale sericulture is promising for a decade or more. First of all, with China's imminent accession to the WTO, cocoons, as raw materials for silk industry with absolute export advantages, have attracted more and more attention from all walks of life.

Secondly, sericulture is the main economic specialty industry in China, and the cocoon output of Zhejiang Province ranks first in the country. This year, the State Council specially forwarded the Circular of the State Economic and Trade Commission on deepening the Reform of the Cocoon Circulation system, aimed at promoting the scale, industrialization and specialization of sericulture production. Zhejiang Province has identified sericulture production as a traditional industry worthy of improvement and upgrading. Shaoxing is one of the main cocoon producing areas in Zhejiang Province, and the cocoon output of Shengzhou ranks first among all counties (cities) in Shaoxing.

Thirdly, at present, the scale of sericulture in our city is too small, which leads to the deviation of mulberry texture, low economic benefit per unit area and cocoon quality deviation. The development of sericulture on a large scale is an inevitable need for the development and stability of sericulture production in our city. However, large-scale sericulture is not a simple expansion of area and an increase in the number of sericulture, but intensive sericulture management on the basis of regional layout, improved varieties, labor-saving management and cocoon quality. The purpose is to improve the comparative efficiency and competitiveness of sericulture.

The market prospect of sericulture

Since the second half of 2013, under the influence of international cocoon and silk supply and demand, the general climate of the national sericulture industry has improved, and the sericulture industry in our province has also improved. cocoon prices have risen steadily in 2014, and the economic benefits of planting mulberry and sericulture have increased significantly. According to the current development trend, the situation of sericulture in 2015 is good, and it is estimated that the price of fresh cocoons will remain above 14 yuan per kilogram.

Planting mulberry and sericulture is of great significance to increase farmers' income in our country. at the present stage, with the increase of market demand at home and abroad, production areas continue to bring new development opportunities to the west, and the diversified development and application of sericulture resources broaden the scope of application. as a result, the sericulture industry has a good development prospect. In the face of the development prospect, it is necessary to develop the technology of efficient mulberry sericulture in order to meet the needs of the society. the high efficiency of mulberry sericulture can be improved by introducing excellent mulberry seedlings and strengthening forest management, introducing fine silkworm varieties and scientific management.

In fact, the development of sericulture has a long history in China, there has been the development of mulberry sericulture in ancient China, and China's silk industry not only developed well at home, but even exported to foreign countries. and our country is also a big country exporting silk.