Resistant Haemophilus influenzae in community-acquired respiratory tract infections: a role for cefixime
1Eijkman-Winkler Institute of Medical and Clinical Microbiology, University Medical Center, Utrecht, Netherlands. j.verhoef@lab.azu.nl
Abstract:
An increase in Haemophilus influenzae resistance has been documented around the world during the last 30 years. Resistance is due to the production of beta-lactamases, and/or changes to penicillin-binding protein (PBP) targets. The resistance problem has led to the need for new therapeutic strategies aimed at maintaining effective management of both upper respiratory tract infections (URTIs) and lower respiratory tract infections (LRTIs). Among antimicrobial agents tested, third-generation cephalosporins have been shown to possess excellent in vitro activity against beta-lactamase-positive and -negative isolates, corresponding with proven clinical efficacy in a wide range of RTIs. The role of H. influenzae in RTIs is outlined, changing trends in epidemiological surveillance studies monitored and implications for therapy, based upon results of clinical trials discussed.
Insights
Haemophilus influenzae resistance is increasing globally due to beta-lactamases and altered PBP targets. Third-generation cephalosporins show promise for treating respiratory tract infections caused by this resistant bacteria.
Area of Science:
- Microbiology
- Infectious Diseases
- Pharmacology
Background:
- Increasing global resistance of *Haemophilus influenzae* over the past 30 years is a significant public health concern.
- Mechanisms of resistance include beta-lactamase production and alterations in penicillin-binding protein (PBP) targets.
- This resistance necessitates novel therapeutic strategies for managing upper and lower respiratory tract infections (URTIs and LRTIs).
Purpose of the Study:
- To review the role of *H. influenzae* in respiratory tract infections (RTIs).
- To examine changing trends in epidemiological surveillance of *H. influenzae* resistance.
- To discuss therapeutic implications based on clinical trial data, focusing on effective antimicrobial agents.
Main Methods:
- Review of published literature and clinical trials.
- Analysis of epidemiological surveillance data on *H. influenzae* resistance patterns.
- Evaluation of in vitro antimicrobial activity and clinical efficacy data.
Main Results:
- Third-generation cephalosporins demonstrate excellent in vitro activity against both beta-lactamase-positive and -negative *H. influenzae* isolates.
- These agents show proven clinical efficacy across a broad spectrum of RTIs.
- Surveillance data highlights evolving resistance trends impacting treatment choices.
Conclusions:
- Third-generation cephalosporins represent a valuable therapeutic option for RTIs caused by *H. influenzae*, including resistant strains.
- Continued epidemiological surveillance is crucial for guiding effective antimicrobial therapy.
- Understanding resistance mechanisms is key to developing future treatment strategies.
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