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Table 2 Cumulative data of microbes in wards and clinics by type of doorknobs

From: Assessment of contamination using an ATP bioluminescence assay on doorknobs in a university-affiliated hospital in Japan

Type of doorknobs Genus- or species-level identification of organisms in wards (CFU/10 cm2 for each) Genus- or species-level identification of organisms in clinics (CFU/10 cm2 for each)
A CNS (10), Corynebacterium (10), Bacillus (6), Micrococcus (6), NFR (3), Aspergillus sp (1), GPR (1) CNS (80), Micrococcus (16), Corynebacterium (1), NFR (1), GPR (1)
B CNS (27), Bacillus (9), Micrococcus (6), NFR (1) CNS (227), Bacillus (73), GPR (5), Micrococcus (1), B. cereus (1), Corynebacterium (1)
C1 CNS (33), Micrococcus (15), Bacillus (13), Corynebacterium (3), GPR (3), NFR (2), Fungi (1) NT
C2 NT CNS (130), Bacillus (34), Micrococcus (8), Corynebacterium (3)
D NT Bacillus (15), CNS (13), GPR and GPC (5), Micrococcus (5), Acinetobacter (1)
E NT CNS (93), Bacillus (31), Corynebacterium (29), Micrococcus (11), GPR (2), NFR (1), S. aureus (1)
  1. Type of doorknobs included grip-type (A), lever-type (B), two pull-types (C1 and C2), push-type (D), and insert-type (E).
  2. CFU colony-forming unit, CNS coagulase-negative staphylococcus, NFR non-fermentative rods, GPR gram-positive rods, GPC gram-positive cocci, NT not tested.