Leptospirosis in the Coffee-Triangle Region of Colombia – mapping incidence and occupational aspects using Geographic information system (GIS
Methods: Surveillance cases data (2007-2011) were used to estimate annual incidence rates of leptospirosis using reference population data (cases/100,000 pop) to develop the first maps of disease in the 53 municipalities of the coffee-triangle region of Colombia (departments Caldas, Quindio, Risaralda). GIS used was Kosmo® 3.1. Five thematic maps were developed according municipalities and years. Using labor official information, an analysis between agriculture (cases among agriculture workers and harvested areas, available for 2008) with disease occurrence was done (linear regression).
Results: Between 2007-2011, 786 cases were reported (77.8% from one department, Risaralda), for a cumulated rate of 32.18 cases/100,000pop. Highest rate was reported in the less developed municipality of one department (Pueblo Rico, Risaralda) with 1535.05 cases/100,000pop (187 cases, 2009). Armenia (Quindio department capital city), reported 23.41 cases/100,000pop (2011). In those patients with identified occupations, 33.3% were agriculture workers, finding a significant relationship between the number of cases in 2008 and the harvested area by municipality (r2=0.48; p=0.0083).
Conclusion: One of the 53 municipalities contributed with almost a quarter of the cases. Agriculture was significantly associated with the incidence. Use of GIS-based epidemiological maps allow to focus actions in prevention and control for risk zones for this disease that still represents a significant issue in the region and the country, particularly in agriculture workers.
L. M. García-Ramírez,
N. Agudelo-Marín, None
Y. A. Holguin-Rivera, None
S. Gómez-Sierra, None
P. V. Ortiz-Revelo, None
N. J. Velásquez-Bonilla, None
A. J. Rodriguez-Morales, None