Strains of staphylococci, klebsiella, proteins, blue pus bacillus and enterobacteria resistant not only to antibiotics but also to chloramine, a disinfectant, were isolated from the test material samples obtained from patients with different purulent-inflammatory processes. The following strains are revealed among the test microorganisms: sensitive simultaneously to antibiotics and chloramine; sensitive to antibiotics but resistant to chloramine; sensitive to chloramine but resistant to antibiotics; simultaneously resistant both to antibiotics and chloramine.