Carbapenemase Genes and Multidrug Resistance of Acinetobacter Baumannii: A Cross Sectional Study of Patients with Pneumonia in Southern Vietnam

• Published in: Antibiotics (Basel) 2019-09, Vol.8 (3), p.148
• Main Authors: Hoang Quoc, Cuong, Nguyen Thi Phuong, Thao, Nguyen Duc, Hai, Tran Le, Trung, Tran Thi Thu, Hang, Nguyen Tuan, Si, Phan Trong, Lan
• Format: Article
• Language: English
• Subjects: Acinetobacter baumannii; Acinetobacter baumannii (Ab); Antibacterial agents; Antibiotic resistance; Antibiotics; Antiinfectives and antibacterials; Bacteria; Bacterial infections; Beta lactamases; blaNDM-1; blaOXA-23-like; blaOXA-51; blaOXA-58-like; Carbapenemase; Causes of; Colistin; Cross infection; Cross-sectional studies; Disease control; Disease susceptibility; DNA polymerase; Drug resistance; Enzymes; Eravacycline; Genes; Genetic aspects; Genetic research; Genotypes; Health aspects; Hospitals; Imipenem; Infection; Infections; Intensive care; MDR Ab; Medical research; Meropenem; Microbial drug resistance; Minimum inhibitory concentration; Mortality; Multidrug resistance; Nosocomial infection; Opportunist infection; Pathogens; Patients; Pneumonia; Respiratory tract; Strains (organisms); Tigecycline
• ISSN: 2079-6382; 2079-6382
• DOI: 10.3390/antibiotics8030148

Background: Acinetobacter baumannii (Ab) is an opportunistic bacterial pathogen found in hospital-acquired infections including nosocomial pneumonia, especially multidrug-resistant Ab. This study aims to survey the drug resistance profiles of Ab isolated from patients in Thong Nhat Dong Nai General Hospital and assess the relationship between genotypes and antibiotic resistance; Methods: Ninety-seven Ab strains isolated from 340 lower respiratory tract specimens among pneumonia patients were used to screen the most common local carbapenemase genes. Antimicrobial susceptibility testing results and demographic data were collected and minimum inhibitory concentrations (MIC) of colistin were also determined; Results: Over 80% and 90% of Ab strains were determined as carbapenem-resistant and multidrug-resistant (MDR), respectively. Most of the strains carried carbapenemase genes, including blaOXA-51, blaOXA-23-like, blaOXA-58-like, and blaNDM-1, with proportions of 97 (100%), 76 (78.4%), 10 (10.3%), 6 (6.2%), respectively. Amongst these genes, blaOXA-23-like was the only gene which significantly influenced the resistance (p < 0.0001); and Conclusions: The severity of Ab antibiotic resistance is urgent and specifically related to carbapenemase encoding genes. Therefore, screening of MDR Ab and carbapenemase for better treatment options is necessary.