Clinicomicrobiological Study of Bacteraemia Caused by Coliforms in AdultsCorrespondence Address :
Dr. Sevitha Bhat,
Department of Microbiology, Kasturba Medical College, Manipal Academy of Higher Education, Mangalore-575001, Karnataka, India.
Introduction: Bacteraemia due to gram-negative bacilli is a huge challenge to the clinicians because of the rapidly emerging multidrug resistance among these microorganisms.
Aim:To study the associated infections and risk factors, antibiotic resistance in coliforms by phenotypic and genotypic methods, to evaluate antibiotic treatment and outcome in coliform bacteraemia.
Materials and Methods: The study was carried out in the Microbiology laboratory of a tertiary care centre. Blood samples were cultured using BacT/ALERT. Antibiotic susceptibility pattern was noted by Vitek 2 Compact system. Phenotypic tests were performed for Amp C beta lactamase, Carbapenemase and MBL.blaNDM-1 & blaKPC gene in carbapenem resistant strains of Coliforms were detected by conventional PCR. The statistical methods used were Chi-square test and Odds ratio.
Results: Urinary Tract Infection (UTI), skin and soft tissue infections and pneumonia were associated with bacteraemia. Risk factors were invasive procedures, previous hospital and ICU admission. Penicillins, Fluoroquinolones, 3rd generation cephalosporins showed high resistance. Of the 25 Carbapenem resistant isolates, Modified Hodge Test (MHT) positive were 11. MBL production by E-test detected 14 of the 25. Of 68 isolates resistant to 3rd generation Cephalosporins, 35 were Amp C producers. Sixteen isolates harbored blaNDM-1, none had blaKPC. Mortality rate was 11.4%.
Conclusion: ESBLs and Carbapenem resistant strains are spreading fast in community and pose therapeutic challenges. There is a dire need to initiate regional surveillance, carry out more effectual antibiotic stewardship and infection control measures to prevent further spread.
Antibiotic resistance, Blood culture, Risk factors
Ankita Porwal, Sevitha Bhat, Ashwini Hegde, Pooja Rao, Shalini Shenoy. CLINICOMICROBIOLOGICAL STUDY OF BACTERAEMIA CAUSED BY COLIFORMS IN ADULTS . Journal of Clinical and Diagnostic Research [serial online] 2018 July [cited: 2019 Jan 23 ]; 12:DC15-DC19. Available from
Date of Submission: Feb 15, 2018
Date of Peer Review: Mar 31, 2018
Date of Acceptance: May 02, 2018
Date of Publishing: Jul 01, 2018
FINANCIAL OR OTHER COMPETING INTERESTS: AS DECLARED ABOVE.
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