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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

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For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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