Akademik Veri Yönetim Sistemi
3rd International Health Services Congress, Mersin, Türkiye, 3 - 04 Şubat 2026, cilt.1, sa.1, ss.140-141, (Özet Bildiri)
Bacillus is a type of Gram-positive bacterium commonly found in nature that forms spores. However, recent data indicate that it can easily multiply in hospital environments. Hospital- acquired infectious diseases are observed in individuals with weakened immune systems. Therefore, Bacillus species isolated from hospitals have become clinically significant. The shared use of equipment by numerous personnel and patients, lack of sterilization, and high patient volume in radiology units, in particular, make microbial contamination more widespread in this area. Therefore, in this study, the resistance of Bacillus pumilus and Bacillus megaterium isolates, isolated from the surfaces of equipment in the radiology units of two hospitals in the Marmara Region and identified by MALDI-TOF MS, to imipenem, meropenem, ciprofloxacin, levofloxacin, norfloxacin, vancomycin, erythromycin, clindamycin, and linezolid antibiotics was determined using the agar disk diffusion method. When inhibition zone diameters were evaluated by the agar disk diffusion method according to EUCAST v16.0, both isolates were classified as susceptible to the tested antibiotics. However, a two-way ANOVA (analysis of variance) showed that both antibiotic type (p=0.000) and Bacillus species (p=0.000), as well as the antibiotic type × Bacillus species interaction (p=0.000), produced statistically significant differences in inhibition zone diameters. Although no resistant Bacillus species were detected in the study, it should be noted that Bacillus species transmitted through surface contact can cause infection. In the context of antibiotic resistance, continuous monitoring of both clinical and environmental resistance is important.
Keywords: Bacillus, Hospital surfaces, Environmental resistance