The Role of Weather in Meningitis Outbreaks in Navrongo, Ghana: A Generalized Additive Modeling Approach

Area of Science:

• Epidemiology
• Environmental Health
• Infectious Diseases

Background:

• Meningococcal meningitis outbreaks occur annually in sub-Saharan Africa's 'Meningitis Belt' during the dry season.
• High temperatures and low humidity may promote meningococcal bacteria transmission and disease conversion.
• Respiratory illnesses can compromise immune defenses, potentially increasing meningitis susceptibility.

Purpose of the Study:

• To assess the association between weather variables and reported meningitis cases in Navrongo, Ghana.
• To adjust for air quality and unobserved confounding factors in the analysis.
• To analyze monthly meningitis counts from 1998-2008.

Main Methods:

• Generalized additive modeling approach used.
• Analysis included relative humidity, rain, wind, sunshine, and temperature.
• Adjustments made for air quality (dust, carbon monoxide) and time-varying confounders.

Main Results:

• Identified significant associations between specific weather variables and meningitis incidence.
• Demonstrated the influence of environmental conditions on disease patterns.
• Highlighted the complexity of meningitis transmission dynamics.

Conclusions:

• Weather variables are key factors in meningococcal meningitis epidemiology in the region.
• Findings can inform public health strategies for outbreak prediction and control.
• Further research into transmission dynamics is warranted.