Meningococci of Serogroup X Clonal Complex 181 in Refugee Camps, Italy

Area of Science:

• Infectious Diseases
• Microbiology
• Public Health

Background:

• Meningococcal disease remains a significant global health concern.
• Serogroup X meningococci (MenX) have historically been less common but are increasingly recognized.
• Migrant populations may face unique health risks due to their travel and living conditions.

Purpose of the Study:

• To report and characterize cases of serogroup X meningococcal infections in a vulnerable population in Italy.
• To identify the specific strain of MenX involved and its potential origin.
• To assess the emerging threat of MenX in newly arrived migrants.

Main Methods:

• Case identification and clinical data collection.
• Laboratory identification and characterization of Neisseria meningitidis isolates.
• Molecular typing (e.g., whole-genome sequencing or MLST) to determine clonal complexes.

Main Results:

• Four cases of MenX infection were identified in migrants in Italy between 2015 and 2016.
• All MenX isolates belonged to the same clonal complex, identified as CC181.
• The infections occurred in individuals residing in refugee camps or reception centers.

Conclusions:

• Serogroup X meningococci represent an emerging infectious disease threat to migrants arriving from African countries.
• The identification of a specific clonal complex (CC181) suggests a potential common source or successful transmission pathway.
• Enhanced surveillance and targeted public health interventions are crucial for this population.