Investigation of the clonal associations in Acinetobacter Baumannii strains isolated from the respiratory samples of patients in a tertiary research hospital

Ozyurt S., Kostakoglu U., Yildiz I. E., Erturk A., Sonmez E., Sahin U., ...More

NIGERIAN JOURNAL OF CLINICAL PRACTICE, vol.23, no.8, pp.1155-1162, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 8
  • Publication Date: 2020
  • Doi Number: 10.4103/njcp.njcp_549_18
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, MEDLINE
  • Page Numbers: pp.1155-1162
  • Keywords: Acinetobacter baumannii, clonal relation, Diversi-Lab, rep-PCR, RESISTANT GRAM, REP-PCR, TIGECYCLINE, PNEUMONIA, EMERGENCE
  • Recep Tayyip Erdoğan University Affiliated: Yes


Objective: The blaOXA resistance genes and ISAba1 were examined in 70 samples from lower respiratory tract of hospitalized patients. Materials and Methods: Of the 67 isolates obtained, almost half (46.3%) of them were from endotracheal aspirate, and most were collected from the intensive care units of the reanimation (37.3%) and internal medicine (32.8%) units. Results: Three samples from the internal medicine intensive care unit had positive cultures. Of the multidrug resistant (MDR) samples, 70 isolates (>50%) were moderately sensitive, while fewer (10%) were resistant to tigecycline. In contrast, 100% were sensitive to colistin. All strains were found to be positive for blaOXA-23-like and blaOXA-51-like genes, whereas no blaOXA-40-like and blaOXA-58-like genes were detected. The ISAba1 positivity rate was 90.0%. Pattern 5 was mainly identified among the 22 different patterns. Of note, 50% of Pattern 5 was found in the patients of the internal medicine intensive care unit, and a third was associated with ventilator-associated pneumonia. Importantly, the internal medicine unit's equipment was found to be culture positive. Conclusion: Findings obtained from this study suggest that isolates can easily spread through the hospital via isolate cross-contamination caused by health personnel. These contaminating isolates may be able to maintain their presence within the hospital for a long time.