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PATHOGENIC BACTERIA AND THEIR SENSITIVITY PATTERNS IN A HOSPITAL POPULATION OF GERIATRIC PATIENTS WITH CHRONIC DISEASE

In a hospital population of geriatric patients with chronic disease, 1,584 patients were tested and the pathogens most commonly involved in their infections were identified. The antibiograms of these bacteria (in vitro) were established. The leading pathogens were Proteus mirabilis, Pseudomonas aeruginosa, Providence group (Proteus inconstans), Escherichia coli, Staphylococcus aureus, and Streptococcus fecalis, in descending order of frequency. Of significance was the emergence of the Providence group (Proteus inconstans), and its high degree of resistance to most antibiotics tested. It is conceivable that the Providence group might become a major pathogen in the future, because its resistance to antibiotics favors its survival. A new, more effective drug is desired for this group.