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Unformatted text preview: Antiviral Antiprotozoal The spectrum of activity is the range of different microbes a drug is able to work against. Narrow-spectrum means that the drug works best against only a certain group or type; broad-spectrum drugs work against a wider range of microbes. If the drug works against bacteria, a broad-spectrum drug would probably do well against both gram-positive and gram-negative organisms. A narrow-spectrum drug would work only against one or the other, or possibly an even narrower group. An ideal antimicrobial would have more effect against pathogens and less on the normal flora of the body. Unfortunately, this is not always possible....
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- Fall '09