Characterization of Neisseria meningitidis isolates from Egypt using multilocus sequence typing

Area of Science:

• Microbiology
• Epidemiology
• Infectious Diseases

Background:

• Neisseria meningitidis causes bacterial meningitis, a significant public health concern.
• Surveillance is crucial for understanding pathogen dynamics and guiding public health interventions, especially after vaccine introduction.

Purpose of the Study:

• To characterize Neisseria meningitidis isolates from Egyptian meningitis cases (1998-2003).
• To assess serogroup distribution, antibiotic resistance, and genetic lineages of N. meningitidis.

Main Methods:

• Serogrouping of 67 N. meningitidis isolates.
• Antibiotic sensitivity testing.
• Multilocus sequence typing (MLST) for genetic analysis.

Main Results:

• Serogroups B (50.7%) and A (34.3%) were predominant.
• Intermediate penicillin resistance observed in 71% of isolates.
• MLST identified recurrent lineages from Europe/Middle East and unique African/novel sequence types.

Conclusions:

• The study highlights shifts in N. meningitidis epidemiology post-vaccine introduction in Egypt.
• Increased penicillin resistance indicates a need to reconsider empirical treatment strategies.
• Understanding genetic diversity is key for future meningitis control efforts.