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THE BEST CONTROL STRATEGY FOR ANTHRAX INFECTION The strategy that best to cure the issues of anthrax is fumigation. Fumigation was chosen because it is a best method to disinfect a huge and spacious building such as CAIS and it is the fastest way. It will not destroys all the important documents in the CAIS and also the books racks and shelves, computers or the furniture. Fumigation method is time saving to disinfect the building. The fumigation is the best method to choose because it can disinfects even the smallest area in the CAIS building. For instance the corners and the edge of book shelves. The effective chemicals that was used is chlorine dioxide to kill all the pathogen that spread the anthrax disease. As a Peter Williams of Vernagene, a UK Manufacturer of chlorine dioxide said that the gas of chlorine dioxide is bad to inhale because it is toxic. But the chlorine dioxide gas can be breaks down into non harmful products because it is eventually simple salts (Daily News, 2001). The chlorine dioxide is used in the fumigation because it does not produce foams rather than other chemicals produce foams that will damage all documents, furniture and computers in CAIS. . Next, the cleaning method can be used because it inexpensive. The Clorox are used during cleaning and it will produced the foams as the bleach is mix up with water. It can decontaminated the area that contains anthrax spores such as on the desks, floor tides or carpet. Disadvantages of this cleaning method is the bleach will wet all the documents and even the books. The cleaning will take more times and have to wait the wet area to be dry. This will causes the spreading of the anthrax spores occur rapidly to other areas and infect the human easily. Moreover, the dry heat sterilization method also can kill all bacteria that spreading the anthrax spores. Disadvantages for the dry heat sterilization is it takes longer times to kill the bacteria and it need very high temperature to sterilize the materials but not all materials are suitable at high temperature. Even the dry sterilization is effective to destroy the spores but the documents and the books in the CAIS cannot be burn and it is unsuitable to do sterilization even there are presence of the anthrax spores. The dry heat sterilization can only be done with the instruments of metal or the materials that made up from glass. In conclusion, the fumigation method with the chemical of chlorine dioxide is the best strategy to decontaminate the anthrax spores. The fumigation will not destroy the important documents and furniture in the CAIS. EXPERIMENTAL SETTING Fumigation method is used to disinfect the CAIS building. The fumigant that is used is formaldehyde. Formaldehyde is an organic compound with the chemical formula CH2O. It has a pungent smell and releases colourless gas. Formaldehyde can react with hypochlorite and chemicals containing chlorine. Therefore, these compounds have to be removed from the building before fumigation is carried out. The forced air ventilation systems, extract systems ad fume cupboards have to be switched off before fumigation process begins. Fire alarm systems have to be deactivated. The space underneath the door and windows are necessary to be sealed up with tapes in order to create a sealed environment. Paraformaldehyde is heated in a frying pan and produces formaldehyde gas. The gaseous formaldehyde is then spread in the building for 6 to 12 hours. During this process, gaseous formaldehyde percolates through the inner building environment to kill infectants. It is used for surrounding decontamination at a concentration of 0.3gram per cubic foot for a duration of four hours. The fumigant works at a optimum humidity of 80% relative humidity. However, the permissible exposure level for fomaldehyde is 0.75 ppm where it cannot exceed the given standard level as it is poisonous and will harm human health. After 12 hours, the windows and doors of CAIS building have to open and unsealed as to ventilate the space and allow carcinogenic gas to escape the surroundings. Extraction system should be activated to release the poisonous gas. Then, check the levels of residue formaldehyde in the building with a suitable air monitoring equipment such as formaldameter. Appropriate equipments have to be wore, for example, full-face cartridge respirator, laboratory coat and gloves before enter the building to check the residue of formaldehyde. Ammonia can also be used to neutralize the formaldehyde. The residue of formaldehyde must be cleaned up if it is found in the space of the building. All sealing materials can be removed once the environment is safe of formaldehyde. The workers are allowed to be back when the level of formaldehyde is below 0.5 ppm.