How to standardize the use of fishery drugs

At present, fishery drug residue is the most common pollution source of aquatic products, and there are many reasons for excessive drugs in aquatic products, among which drug abuse and feed additives are the main culprits. Standardizing the use of drugs is a fundamental measure to prevent drug residues of aquatic products from exceeding the standard, improve the quality of aquatic products and overcome the "green barrier". For this reason, the author talks about how to standardize the use of fishery medicine from the following aspects, in order to provide reference for the majority of farmers.

I. strict implementation of state laws and regulations

In recent years, relevant departments have successively promulgated laws and regulations such as the Law on Animal epidemic Prevention, the regulations on the Administration of Feed and Feed Additives, and the regulations on the Administration of Veterinary drugs. Notice No. 193 of the Ministry of Agriculture explicitly forbids the use of more than 40 veterinary drugs and compounds in 21 categories. The state has brought the regulation of drug use into the track of the legal system, there is a law to follow, and the interests of farmers and consumers are protected by law. It is hoped that the majority of breeders will strictly implement it.

II. Scientific and rational use of drugs

Scientific and rational use of fishery drugs is an important measure to ensure the safety of aquatic products: chapter 4 of the regulations on the Management of quality and Safety in Aquaculture stipulates that the use of drugs in aquaculture should comply with the regulations on the Administration of Veterinary drugs and the guidelines for the use of pollution-free Food and Fisheries drugs of the Ministry of Agriculture (NY5071-2002). Aquaculture aquatic products that use drugs shall not be used for human food consumption during the drug withdrawal period; the use of fake or inferior fishery drugs and drugs, other compounds and biological preparations prohibited by the Ministry of Agriculture shall be prohibited. Raw materials shall not be directly used in aquaculture; aquaculture units and individuals shall use drugs scientifically in accordance with the requirements of the instructions for the use of drugs in aquaculture or under the guidance of aquatic biological disease prevention and control officers; aquaculture units and individuals shall fill in the Aquaculture Drug use record, which shall be kept for more than 2 years after all the aquatic products.

3. Strictly abide by the system of drug suspension

Drugs enter the fish, generally go through absorption, metabolism, excretion and other processes, will not immediately disappear from the body. Drugs or their metabolites are retained in tissues, organs or edible products in high concentrations by accumulation, storage or other means. During the withdrawal period, toxicological residues in fish tissues can be gradually eliminated by metabolism until they reach a "safe concentration", that is, lower than the "allowable residues", or disappear completely. Of course, the withdrawal period varies with the type of fish, the type of drug, the form of preparation, the dosage, the route of administration and the distribution in the tissue. After the withdrawal period, the drugs temporarily remaining in the fish are broken down to concentrations that disappear completely or are harmless to the human body. Thus it can be seen that the regulation of drug withdrawal period is to reduce or avoid excessive amount of residual drugs in aquatic products for human consumption and to ensure food safety.

IV. Rational use of Chinese herbal medicine

Chinese herbal medicine has the advantages of no drug residue, no hormone, no drug resistance, wide drug source, local materials, low price, stable curative effect, low side effect and so on. It is an important means of production of pollution-free aquatic products. Chinese herbal medicine is not only antibacterial, anti-inflammatory, anti-virus and anti-parasite, but also rich in vitamins, minerals and trace elements. With the increasing resistance of antibiotics and sulfonamides and the increasing number of drug-resistant strains, it is very important to develop and utilize Chinese herbal medicine to prevent and cure fish diseases.

V. correct use of fishery biological drugs

Fishery biopharmaceuticals refer to the use of natural or artificially modified microorganisms, parasites, biotoxins or biological tissues and their metabolites as raw materials, biological agents made by biology, molecular biology or biochemistry and used to prevent, diagnose and treat infectious diseases and other related diseases of aquatic animals. Its effect or safety should be verified by biological methods and have strict reliability. Vaccines are the most widely used biological products in aquatic products. Fishery vaccines are the finished products made from the treatment of fish pathogens with good immunogenicity, which can be used to inoculate aquatic animals to produce corresponding specific immunity.