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Bacteria does not always a negative effect upon your health. In fact your body contains a number of commensals which live within you body, such as in your gut or genital tract, or such as Staph aureus, which lives harmlessly lives upon your skin. Bacteria only becomes harmful to body, once it has been displaced. In iv drug users, S. aureus can be injected directly into the blood stream causing a condition known as bacterial endocarditis, where vegetations form upon the heart valves (most commonly on the righthand side in IVDU). Use of antibiotics can also lead to the erradication of your natural commensals throughout the GI tract, and lead to the overpowering habituation of C. difficile, which is usually kept to a low number by other bacteria which thrive in the GI tract. This can cause excessive diarrhoea and possible death.

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16y ago

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