On March 26th, China Agricultural University invented a nanoscale acidic dry disinfectant powder that can effectively prevent and treat swine foot-and-mouth disease.
Tests have shown that this dry powder disinfectant has a very significant killing effect on foot-and-mouth disease virus. Zhao Xingbo, a professor at the College of Biology at the China Agricultural University, one of the researchers, said that dry powder is weakly acidic, and the foot-and-mouth disease virus is very sensitive to both acids and bases. Therefore, an acidic environment can significantly suppress and kill the virus. However, due to the short time of liquid acids, the acidity of peracetic acid and the like can only last for several hours after spraying, and the solid acid has the characteristics of long duration and is not affected by environmental factors.
On-site microbiological testing showed that after spraying dry powder for one hour, the number of E. coli colonies in the air was slightly higher than that of the liquid disinfection group, and the number of E. coli colonies in plate culture was about 13, but subsequent tests showed that the use of dry powder in the disinfection of livestock houses The number of E. coli and the number of bacteria in the air remained at a relatively low level and reached a minimum after 12 hours, which was in stark contrast to the uncountable number of bacteria after 12 hours of liquid disinfectants. Zhao Xingbo said that the traditional method is to disinfect the environment by spraying disinfectants inside and outside the barn. Its disadvantages are short time for disinfection, and it is vulnerable to environmental humidity, pH, feces, feed pollution and other factors, which will increase the growth of pathogenic microorganisms. probability. This new technology overcomes the disadvantages of the liquid disinfectant's dampness, short-term disinfection, and large environmental disturbances. The use of non-toxic, non-polluting nano-new materials has no harm to humans and animals, and animals have no side effects when they come into contact with dry powder particles.
Zhao Xingbo said that due to the dispersion of nano-sized particles, through the fan Yansa, dry powder particles filled the house for 30 minutes, can touch every gap, so no dead disinfection, dry environment, can effectively kill the environment, bacteria, viruses, etc. Pathogens.
Tests have shown that this dry powder can also absorb water and viruses in the environment, has good convergence, and can promote wound healing in pigs. Tests on hundreds of thousands of pigs in dozens of pig farms in Guangdong, Jiangxi, Hunan, and Shandong provinces have proved to be effective in preventing and controlling foot-and-mouth disease. A farmer from a farm in Shandong said that after using the dry powder disinfectant, the farm environment was significantly improved, the pungent ammonia in the farm was gone, and the pig lived in a dry and comfortable environment. It was no longer the kind of wet In a dirty environment, the incidence of pigs was significantly reduced, and the survival rate of piglets was 95% or more.