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Children are commonly infected through a cut, scrape or insect bite, but they can also develop impetigo without having any notable damage to the skin.
CNN: Impetigo
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It begins as a raised itchy bump that resembles an insect bite, but soon turns into a painless ulcer, usually one to three centimeters in diameter usually with a black center in the middle.
CNN: Ten things you need to know about anthrax
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The cause of Chagas disease is the parasite Trypanosoma cruzi, which is transmitted to humans from a bite from an insect known as the triatomine bug.
CNN: Chagas disease