Overview of Melioidosis
- Cause
- Bacterial infection caused by Burkholderia pseudomallei, primarily acquired through inoculation, inhalation, or ingestion of contaminated soil and water.
- Global Burden
- Annually, 165,000 cases worldwide, with South Asia (including India) accounting for 44% of cases (The Lancet, 2016).
- Medical Complexity
- Can present as mild skin infection to severe sepsis (fatality rate up to 50% in septicemia).
- Difficult to diagnose due to prolonged bacterial incubation and similarity with Pseudomonas aeruginosa.
- Treatment requires extended antibiotic therapy: Intravenous phase followed by a 12-20 week eradication phase.
Odisha-Based Study on Environmental Impact
- Conducted by AIIMS Bhubaneswar (Microbiology Dept.) and IIT Bhubaneswar (Climate Sciences).
- Objective: To investigate how climate and environmental factors influence melioidosis transmission in Odisha.
- Methodology
- Nine-year study (2015-2023) tracking 144 cases.
- Analysed 3,024 days of meteorological data: rainfall, temperature, humidity, solar radiation.
- Created a state-wide risk map using 10 km grid sizes.
Key Findings
- Seasonal Pattern
- Peak infections during and after monsoon.
- Strong correlation with temperature, rainfall, cloud cover, and solar radiation.
- High-Risk Districts: Cuttack, Balasore, Khordha, and Jajpur—coinciding with densely populated regions.
- Other Contributing Factors
- Land-use changes and soil composition (not fully explored due to data limitations).
- Rapid urbanization and poor sanitation increasing human exposure to the bacteria.
- Climate change altering rainfall patterns, potentially expanding or shifting disease prevalence.
Implications for Public Health and Policy
- Need for Climate-Integrated Disease Surveillance
- Use weather and climate analytics in disease prediction models.
- Enhance public health planning and outbreak preparedness.
- Potential Beyond Melioidosis
- Study serves as a model for other climate-sensitive infectious diseases.
- Odisha’s research approach could be replicated in other vulnerable regions.
