Evaluating minimum inhibitory concentration values of levofloxacin and azithromycin on haemophilus influenzae

Mithileshkumar Jha, M. Suchitra Shenoy, Sevitha Bhat

Research output: Contribution to journalArticlepeer-review


Background: Community Acquired Pneumonia (CAP) is leading cause of morbidity and mortality in all age groups globally. 4 million cases of Community Acquired Pneumonia occur annually. Haemophilus influenzae is a causative organism of CAP. Empirical treatment with antibiotics like levofloxacin and azithromycin is recommended in these cases. Objectives: This study was conducted to evaluate the minimum inhibitory concentration of levofloxacin and azithromycin in H. influenzae isolates from respiratory specimens. Design: Minimum inhibitory concentrations of levofloxacin and azithromycin in 40 clinically significant H.influenzaeisolates were tested using E-test method after the approval of Institutional Ethics committee. The results were analyzed according to 2019 CLSI guidelines. Result: MIC50 for levofloxacin was 0.008 µg/ml, MIC90 1.5 µg/ml and the 3 resistant isolates had MIC ranging between 8 and 12 µg/ml. Azithromycin MIC50 was 0.047µg/ml, MIC90 6.4 µg/ml and 5 resistant isolates had MIC between 6 and 32µg/ml. Conclusion: The rising MIC of levofloxacin and azithromycin in H.influenzaeemphasizes the need to monitor the antibiotic susceptibility pattern on a regular basis. It is also advisable to restrain the use of fluoroquinolones to make it available for use in the tuberculosis treatment and also to avoid any adverse effects.

Original languageEnglish
Pages (from-to)2420-2423
Number of pages4
JournalIndian Journal of Public Health Research and Development
Issue number11
Publication statusPublished - 11-2019

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health


Dive into the research topics of 'Evaluating minimum inhibitory concentration values of levofloxacin and azithromycin on haemophilus influenzae'. Together they form a unique fingerprint.

Cite this