Antibiotic improve treatment outcome as the combined effect of both antibiotics is better than their individual effect. Methicillin-resistant Staphylococcus aureus infections may be treated with a combination therapy of fusidic acid and rifampicin. Antibiotics used in combination may also be antagonistic and the combined effects of the two antibiotics may be less than if the individual antibiotic was given as part of a monotherapy. For example, chloramphenicol and tetracyclines are antagonists to penicillins and aminoglycosides. However, this can vary depending on the species of bacteria. In general, combinations of a bacteriostatic antibiotic and bactericidal antibiotic are antagonistic. Antibiotics are commonly classified
Antibiotic Resistance Lab Network Antibiotic Resistance Lab Network The Antibiotic Resistance Lab Network (ARLN) is a group of laboratories of the United States Centers for Disease Control and Prevention established to supplement the work of local and state public health laboratories in the identification and research of antibiotic resistance. It was created as part of the CDC's "National Action Plan for Combating Antibiotic Resistant Bacteria". The network is part of the National Center for Emerging and Zoonotic Infectious Diseases. Laboratories in this network cover seven regions and are located in Maryland, Minnesota, New York, Tennessee, Texas, Washington, and Wisconsin, as part of their state