Under normal circumstances, when disinfection at high temperature, 60 can kill most pathogens, but when the temperature of the gasoline blowtorch reaches a few times, the flame of the blowtorch will not kill the pathogen because the time is too short. Steaming and disinfection: 30 minutes after the water is boiled, it can kill the pathogen. Ultraviolet exposure: must reach more than 5 minutes.
Note: The time mentioned here is not only the time used for disinfection, but more importantly, the effective time of contact between the pathogen and the disinfectant. Because pathogens often attach to other substances or in the middle, disinfectants need to penetrate first when they come into contact with pathogens, and it takes time to penetrate, sometimes longer!
1. Disinfection requires contact between drugs and pathogens
Disinfection in the delivery room will not kill the pathogen in the nursery, the same in the delivery room, where the disinfectant can not be sprayed, the pathogen will not be killed, when disinfecting the ground of the fattening house, if there is a thick layer of feces on the ground, the disinfectant can only kill the top pathogen, but the pathogen in the deep feces will not be killed, because the disinfectant has not yet been in contact with the pathogen. Therefore, we require the pig house to be cleaned and rinsed before disinfection in order to reduce the impact of other factors.
Second, disinfection requires sufficient doses
Disinfectants often destroy themselves while killing pathogens, and one disinfectant molecule may only be able to kill one pathogen, and if one disinfectant molecule encounters five pathogens, no matter how good the disinfectant is, it will not be effective. Regarding the dosage of disinfectant, it is generally 1 liter of liquid medicine per square meter of area. What is common in production is that without calculation, just spray all the inside of the house with disinfectant, and the ground will dry immediately after people leave, so the disinfection effect is very poor, because the disinfectant cannot contact with the pathogens hidden in the depths.
3. Disinfection needs to be free of interference
Many disinfectants will fail when encountering organic matter, and if these disinfectants are used in a disinfection pool, and some sawdust is placed in the pool as a means of disinfection of the soles of shoes, the effect will not be good.
Fourth, disinfection requires drugs to be sensitive to pathogens
Not every disinfectant is effective against all pathogens, but it is targeted, so there is also a target when using disinfectants. For example, iodine preparations are more effective in preventing foot-and-mouth disease, while peracetic acid may be preferred for colds, while high temperatures and ultraviolet rays may be more practical for preventing infectious gastroenteritis.
Note: No single disinfectant can kill all pathogens, and even if we believe that the most reliable high-temperature disinfection will not be destroyed, there will be heat-resistant bacteria that will not be destroyed. This requires us to change disinfectants frequently when we use them, so that they can achieve the best results.
5. Disinfection needs conditions
For example, caustic soda is a good disinfectant, but if the pathogen is placed on the dry caustic soda, the pathogen will not die, only the caustic soda dissolved in water becomes caustic soda water has a disinfection effect, and the same is true of quicklime.
A pig farm fumigated and disinfected the clothes of the people entering the farm, and made a disinfection cabinet, but due to the unsatisfactory design at the beginning, the disinfection cabinet was too large to enter the house, so it was placed outside the house. There is no problem with disinfection in summer and autumn, but in winter, they still fumigate and disinfect outside the house, which is very ineffective. There are also in the disinfection pool, just routinely put water and caustic soda into it, and do not stir, caustic soda needs a long time to dissolve by itself, and the effect of the freshly placed disinfectant water is not certain.
Nowadays, the African swine fever epidemic is still raging and spreading, which is a kind of torment for the operation and survival of pig farms and the entire breeding industry.
However, the African swine fever virus is not indestructible, although there is no effective vaccine to be applied at present, but the virus is weak to heat, and general disinfection measures can kill the virus, but the infected pig tissues and the virus can still live for more than 6 months or even several years under low temperature conditions.
Therefore, effective, high-quality disinfectants have become a must-have and necessity for pig farms!!
The most effective disinfectants are detergents, hypochlorites, alkalis and glutaraldehyde!
8 1000 sodium hydroxide (30 min), hypochlorite -23 Chlorine (30 min 1000 **30 min o-phenylphenol (30 min) inactivates the virus.
Alkalis (sodium hydroxide, potassium hydroxide, etc.), chlorides and phenolic compounds are suitable for disinfection of buildings, wooden structures, cement surfaces, vehicles and related facilities and equipment, and alcohol and iodide are suitable for personnel disinfection.
Disinfection standard, draw inferences!
Choose the right disinfection drugs and appropriate disinfection equipment: sprayers, flamethrowers, disinfection vehicles, disinfection protective equipment (such as masks, gloves, protective boots, etc.), disinfection containers, etc., you need to clean the organic matter, dirt, feces, feed, bedding, etc. on the vehicles and articles before disinfection.
Feed and bedding of farms (households): piled up, fermented or incinerated and other methods; Feces and other dirt: after chemical treatment, it is treated by deep burial, accumulation fermentation or incineration; Enclosures, vehicles, slaughtering and processing, storage and other places: disinfect by disinfectant cleaning, spraying, etc.; Metal facilities and equipment: disinfection by means of flame, fumigation and washing; Dormitories, public canteens and other places for office and breeding personnel within the epidemic area: spraying can be used for disinfection; It is necessary to treat the sewage produced by disinfection harmlessly; Avoid contact with people from epidemic areas, prohibit people from epidemic areas from entering the venue, and the management personnel of this farm can take shower disinfection; Clothing, hats, shoes and other items that may be contaminated should be disinfected by soaking in disinfectant solution and autoclaving.
Regular disinfection is carried out on a daily basis; The epidemic site was disinfected 3 5 times a day for 7 consecutive days, and then disinfected once a day for 15 days; The temporary disinfection station in the epidemic area will do a good job of disinfection of personnel entering and leaving the vehicle until the blockade is lifted.
Pig farming