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ZOONOSE CONTROL APPROACHES
1. Approaches to the control of zoonoses differ according to the type under consideration. Because the majority of direct zoonoses and cyclozoonoses and some saprozoonoses are most effectively controlled by techniques involving the animal host, methods used to combat these diseases are almost entirely the responsibility of veterinary medicine. 2. A good example is the elimination of stray dogs, for they are an important factor in the control of zoonoses such as rabies, hydatid disease, and visceral larva migrants. In addition, the control of diseases such as brucellosis and tuberculosis in cattle involves a combination of methods - mass immunization, diagnosis, slaughter of infected animals, environmental disinfection, and quarantine. 3. Air-sanitation measures are helpful in direct zoonoses in which human illness is spread by droplets or dust, and zoonotic infections that are spread through a fluid medium, such as water or milk, sometimes can be controlled. Heat, cold, and irradiation are effective in killing the immature forms of Trichinella spiralis, the causative agent of trichinosis, in meat; and certain antibiotic drugs help to prevent deterioration of food. 4. The control of metazoonoses may be directed at the infected vertebrate hosts, at the infected invertebrate host, or at both. Particularly effective in this instance has been the use of chemical insecticides to attack the invertebrate carriers of specific infections, even though several difficulties have been encountered - for example, the inaccessibility of the invertebrate to the chemicals, which occurs with organisms that breed in swiftly flowing waters or in dense vegetation, and the development of insecticide resistance by the organisms. Insecticides are used to destroy the mosquitoes that spread malaria. Mechanical filters placed across irrigation ditches help to prevent the dissemination of the snails that transmit parasitic flatworms. (Encyclopedia Britannica) Определите, является ли утверждение: Food deterioration can be reduced by applying antibiotics. Варианты ответов: 1. в тексте нет информации 2. истинным 3. ложным
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