[Meningococcal meningitis in Italy: 1887-1986]

Area of Science:

• Epidemiology
• Infectious Diseases

Background:

• Meningococcal meningitis has posed a significant public health challenge globally.
• Understanding long-term epidemiological trends is crucial for effective disease control.

Purpose of the Study:

• To analyze the epidemiological data of meningococcal meningitis in Italy over a 100-year period (1887-1986).
• To identify epidemic patterns, case fatality rates, seasonal and geographical distribution, and age/sex-specific incidence.

Main Methods:

• Retrospective analysis of mortality and morbidity data from Italy spanning 1887 to 1986.
• Examination of epidemic peaks, case fatality rates, seasonal variations, regional distribution, and age/sex demographics.

Main Results:

• Three major epidemic peaks occurred: 1915-1918, 1939-1943 (linked to World Wars), and 1968-1972 (pandemic recrudescence).
• Case fatality rate averaged 10% until the 1960s, then showed a stable decrease.
• Disease incidence peaks between December and April, with no significant regional disparities.
• Initially prevalent in the 0-14 age group, a recent trend shows a reduction in this group and a relative increase in those over 25.
• Meningococcal meningitis was more prevalent in males under 25, with equal incidence thereafter.

Conclusions:

• Meningococcal meningitis in Italy has exhibited distinct epidemic cycles influenced by historical events and potential pandemic waves.
• Significant improvements in case fatality rates have been observed in recent decades.
• Shifting age demographics, with increasing incidence in older adults, warrant further investigation and targeted public health strategies.