“…The discovery of an effective antifungal antibiotic, nystatin, has been followed by reports of its use in the treatment of various clinical conditions (Drouhet, 1955;Robinson, 1955;Sarewitz, 1955;Sloane, 1955;Stewart, 1956) and also prophylactically to prevent Candida infections in patients on long-term treatment with broad-spectrum antibiotics and cortisone (Childs, 1956;Stewart, 1956). So far, there have been no reports of strains of Candida which were resistant to nystatin, but it seems to be advisable to look out for the appearance of such strains, especially if the antibiotic is to be used prophylactically on a large scale.…”