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The macrolide antibiotics typically have a large lactone ring in their structure and are much more effective against gram-positive than gram-negative bacteria. They are also active against mycoplasmas and some rickettsiae
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مجلة الامة العربية هي مجلة اليكترونية للامة العربية في مجالات و موضوعات متعددة تهم كل العرب رئيس التحرير مهندس عبدالسلام عبداللطيف المنسي