Detection of OXA-23, OXA-48, OmpA and bla-TEM genes in carbapenem-resistance Acinetobacter baumannii and biofilm formation in burn patients at Al-Anbar Government

Abstract

Background. Antibiotic-resistant bacteria represent a highly global health issue by causing high rates of morbidity and mortality in burn units, whereas biofilms significantly contribute to complications in burn patients. Objectives. The study investigates the prevalence of (OXA-23, OXA-48, OmpA and bla-TEM) and biofilm formation of Acinetobacter baumannii in the Burn Unit of the Al-Anbar government. Methods. A total of 120 clinical swab samples from burn patient were collected from December 2023 to April 2024 from the burn units of Ramadi Teaching Hospital and Falluja Teaching Hospital for the study. The colonies were identified using conventional and Vitek methods. Colorimetric technique (MTP) and multiplex PCR were used to detect biofilms and resistance genes. Results. Among 120 samples, 40 (33.3%) were Acinetobacter baumannii, 34 (80%) were MDR- resistant, and 6 (15%) were XDR. 90% of the isolates were resistant to Cefotaxime, and Colistin was more sensitive in all forty isolates. All 40 isolates formed significant biofilms. The percentage of positive results for OXA-23, OmpA and bla-TEM genes were 80%, 65%, and 55% of respectively. Carbapenem testing is essential to identify carbapenem-producing strains from non-producing strains due to the high prevalence of multidrug-resistant A. baumannii with the OXA-23 and OmpA genes. Conclusion. These findings highlight the urgent need for effective infection control measures and the development of new therapeutic strategies to manage these infections in burn patients.