Health

China CDC: Technology Empowers Blood Control, Intelligent Snail Removal Protects Health

2026-04-09   

According to the CDC WeChat official account, snail is the only intermediate host of schistosoma japonicum, and snail control is one of the key measures to control and eliminate schistosomiasis. However, due to the wide distribution range, complex breeding environment, and susceptibility to climate change, floods, and changes in ecological environment, snail control has become a difficult point in current blood control work. Nowadays, technological innovation has injected new impetus into snail control and prevention, from "crowd tactics" to "precise prevention and control", from manual pesticide application to intelligent operations. The power of technology has gradually become the hardcore support for eliminating schistosomiasis, and has built a solid defense line for safeguarding the health of the masses. Knowing snails, the only "accomplice" of schistosomiasis, snails have a small body size, generally no more than 1 centimeter in length and no more than 4 millimeters in width. The overall appearance of the snail shell is yellow gray brown, with a spiral number of 6-9 turns. It twists from left to right around the shell. In the popular areas of lakes and marshes, the nail snail shell surface can be seen with longitudinal raised rib like structures called longitudinal ribs, while most nail snails in mountainous areas do not have longitudinal ribs. It is amphibious and prefers the surrounding environment of water with a temperature of 15-25 ℃ and a pH value of 6.8-7.8. It is commonly found in areas such as slow-moving riverbanks, lakes, reed marshes, rice fields, and ditches. Meanwhile, snails often hide in wet mud and weeds, blending with the colors of surrounding soil and vegetation, making them difficult to detect. The complex and diverse breeding terrain and hidden survival habits of snails pose many obstacles to snail eradication work and have become a key and difficult point in schistosomiasis prevention and control. Tailored to local conditions, various snail control technologies have been developed. Through long-term blood control practices, China has accumulated rich experience in snail control, and various traditional snail control techniques have played important roles in different periods and regions. Drug snail control is one of the commonly used methods, which can effectively kill snails and reduce local snail density by applying snail killing agents (such as chloramphenicol) in snail breeding grounds; Covering snails with plastic film is a method of using the heat and light absorption properties of plastic film to increase the temperature inside the film, keeping the pesticide at an effective snail killing concentration, and creating a toxic environment with high temperature and oxygen deficiency to kill snails; Mud application for snail control is the process of adding snail killing agents to the mud, stirring and mixing to make a paste like paste, and applying it to the surface of the snail infested environment to kill the snails. In terms of physical snail control, small environment transformation and environmental transformation projects in agricultural and rural areas, forestry and grass, water conservancy and other departments also played a key role, such as measures such as landfill ditches, hardening mudflat, promoting forests and snail control, and changing water into drought to reduce areas suitable for snail breeding at the root. Technological breakthroughs have led to the transformation of drones into snail killing robots. Traditional snail killing and pesticide application are constrained by geographical terrain, labor shortages, and other issues, resulting in limited snail killing coverage and potential impact on snail killing efficiency. To solve this problem, research on the on-site application of drone spraying snail killing drugs has been carried out in many places such as Jiangsu, Anhui, Yunnan, Sichuan, Hubei, etc., testing different landforms such as riverbanks, lakes, hills, and ditches, making drones a surprise on the front line of snail killing. By combining professional drones with commonly used snail killing drugs, drone spraying has significant advantages in complex terrain scenes, covering areas that are difficult to reach by traditional methods and eliminating artificial blind spots. At the same time, drone spraying has higher uniformity and lower dispersion of drug spraying. It can also use intelligent positioning to plan routes, avoid ineffective spraying, and achieve a win-win situation for ecological and prevention benefits. Empowered by technology, the quality and efficiency of snail control work have been improved. From manual snail control to unmanned aerial vehicle aerial operations, from experience based prevention and control to technological empowerment, technology is driving blood control work towards high quality and precision. The remote pesticide application and snail control mode of unmanned aerial vehicles optimizes the drawbacks of traditional manual operation, achieves safe distance operation, reduces labor intensity and risk of contact with epidemic water, effectively alleviates the shortage of snail control human resources, and minimizes the impact of weather and environmental factors on pesticide application progress. In practical operation, the effectiveness of drone snail control will also be affected to varying degrees by factors such as wind force, precipitation, flight altitude, and obstacle clearance. In the future, we will continue to optimize our technology, develop drugs and parameters that are suitable for complex environments and weather, and make them more in line with the actual needs of on-site snail control. The participation of the whole nation and the development of personal prevention are the most crucial technological barriers for snail control, and the participation of the whole nation and the implementation of personal protection are even more crucial in eliminating schistosomiasis. Here, we have compiled the key points for schistosomiasis prevention for everyone. Please keep them in mind and protect your own and your friends' health! 1. Do not come into contact with suspicious water bodies (such as water bodies containing schistosomiasis cercariae, which are called epidemic water), and do not go to areas where snails are prone to breeding, such as riverbanks, rice fields, reed beds, and surrounding water bodies for activities; 2. If it is necessary to carry out water operations, such as agricultural work, flood prevention and disaster relief, comprehensive protection must be taken, wearing waterproof rubber shoes, protective gloves, reducing skin exposure, or applying protective equipment such as anti parasite cream; 3. Actively learn about schistosomiasis prevention knowledge, actively cooperate with community health education, understand whether the permanent residence area, travel or business trip destination is a schistosomiasis epidemic area, master basic snail recognition skills, and if snails or suspicious snails are found, report to the local disease control department or schistosomiasis prevention institution in a timely manner. Do not touch or capture them on your own; 4. If symptoms such as fever, rash, diarrhea occur after accidental contact with contaminated water, it is necessary to immediately seek medical attention at a regular hospital and proactively inform key information such as contact history with contaminated water and travel history to the epidemic area. If diagnosed with infection, it is necessary to follow medical advice for standardized treatment. (New Society)

Edit:WENWEN Responsible editor:LINXUAN

Source:people.com

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