Antibiotics for gram-positive organisms.

Most infections due to Gram-positive organisms can be treated with quite a small number of antibiotics. Penicillin, cloxacillin, and erythromycin should be enough to cover 90 per cent of Gram-positive infections. The relatively narrow spectrum of these drugs should be the incentive to prescribers to use them selectively, together with adequate bacteriological investigation, in order to achieve effective treatment with a minimum of disturbance to the patient's normal bacterial flora and without any other harmful side effects.