Multiply resistant Haemophilus influenzae type b causing meningitis: comparative clinical and laboratory study

Area of Science:

• Microbiology
• Infectious Diseases
• Clinical Medicine

Background:

• Meningitis caused by Haemophilus influenzae type b (Hib) poses a significant public health challenge.
• Antibiotic resistance in bacterial pathogens is a growing concern, impacting treatment efficacy.
• Previous treatment strategies for Hib meningitis relied on antibiotics like ampicillin and chloramphenicol.

Purpose of the Study:

• To assess the prevalence of ampicillin and chloramphenicol resistance in Haemophilus influenzae type b strains causing meningitis.
• To compare clinical outcomes and mortality between patients infected with resistant and susceptible strains.
• To identify effective alternative therapeutic agents and establish current treatment guidelines.

Main Methods:

• Retrospective analysis of 35 patients with Hib meningitis admitted between January 1981 and December 1984.
• Antimicrobial susceptibility testing for ampicillin and chloramphenicol.
• Comparison of demographic, clinical, and outcome data between groups based on antibiotic resistance profiles.

Main Results:

• High resistance rates were found: 60% of strains were ampicillin-resistant, 65.7% chloramphenicol-resistant, and 57% resistant to both.
• No significant differences in age, sex, clinical presentation, outcome, or mortality were observed between patients with resistant and susceptible strains.
• Alternative agents like carbenicillin/gentamicin and new cephalosporins were considered.

Conclusions:

• Significant ampicillin and chloramphenicol resistance in Hib meningitis necessitates alternative treatment strategies.
• Cefotaxime has emerged as the preferred treatment for meningitis caused by Haemophilus influenzae type b.
• Ongoing surveillance of antibiotic resistance patterns is crucial for effective management of bacterial meningitis.