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Unformatted text preview: Antibiotics Various families of antibiotics are used for various types of microorganisms to achieve control and assist body defenses during times of infection. Antibiotics are products of microorganisms that react with and inhibit the growth of other microorganisms. An antibiotic should be selectively toxic to pathogenic microorganisms, should not incite an allergic response in the body, should not upset the normal microbial population of various body sites, and should not foster the development of drug resistance. Penicillin. Penicillin prevents Gram-positive bacteria from forming peptidoglycan, the major component of the cell wall. Without peptidoglycan, internal pressures cause the bacterium to swell and burst. Penicillin is not one antibiotic, but a family of antibiotics. The family includes penicillin F, penicillin G, and penicillin X, as well as ampicillin, amoxicillin, nafcillin, and ticarcillin. The first penicillin was and penicillin X, as well as ampicillin, amoxicillin, nafcillin, and ticarcillin....
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- Fall '07