how to flies spread diseases class 4th
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Insects (mosquitoes, lice, fleas, bed bugs) and ticks are able to transmit a number of diseases caused by infectious agents: viruses (chikungunya virus, yellow fever, dengue fever, etc.), bacteria (Lyme disease, plague, etc.), parasites (malaria, sleeping sickness, leishmaniasis, filariasis, etc.).
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when the flies touch a contaminated object then bacteria get stuck with its legs and when tha bacteria carring fly sit on human bacteria enters the body and spread disease all over the body
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