tetracyclines

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tetracyclines (tet-ră-sy-kleenz) pl. n. a group of antibiotic compounds derived from cultures of Streptomyces bacteria. These drugs, including doxycycline, oxytetracycline, and tetracycline, are effective against a wide range of bacterial infections, including Chlamydia, respiratory tract infections, and acne. They are usually given by mouth.

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