Geographic information systems (GIS), an informative start for challenging process of etiologic investigation of diseases and public health policy making

Background:the public health has been always concerned of the immediate environment of human as causal factors for different diseases and health outcomes. epidemiology, as one of the fundamental basis of public health, is concerned of how diseases are distributed in terms of geographical, chronological, and human population characteristics and employees the descriptive nature of such spread to draw conclusion on the etiology of health or disease utcome for further policy making on prevention of disease or promotion of health.methods: in this paper, we present the importance of gis technology in epidemiology from both descriptive and etiologic standpoints and elaborate how this technology can stand in the forefront of disease and health outcome measures in the coming decades. the paper will address the history of geo-reated health and disease issues. the mapping tool as a traditionally strong resource in the public health will be explored. the advances in information technology and one of its best utilized offshoot, gis, in health and disease will be discussed. how the huge repository of generated or ever generating geo-relsted data and information is utilized to address etiology of diseases or to help public health authorities in making infonned policy making decisions are explored. results: the utilization of gis technology in diseases with intermittent host such as malaria, yellow fever,or other parasitic diseases has already been well established. the gis technology and itsutilization in chronic and degenerative diseases such as cancer, diabetes, and aging areunder development and new frontiers are discovering. the limitation of gis technologyin addressing host environment interaction in micro-environment (at the molecular biology and tissue pathogenicity level) and gene-environment interaction (at the individual level) will further be discussed.conclusion: we then distress on the etiicient use of gis both in the etiologic investigation of diseases and health events as well as the utilization of the gis technology as a administrative tool in the help of public health authorities and policy makers in strategic management of health of a community or emergency management of man-made or technological disasters (e.g., wars) or naturally occurring disasters (e.g., earthquake and floods).