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Disease diffusion mapping
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<h2 id="disease-diffusion-types">Disease diffusion types</h2> <ul><li><i>Expansion diffusion</i> occurs when the spreading phenomenon has a source and diffuses outwards into new areas, an example being a spreading <a href="/facts/Wildfire/LU3797A0">wildfire</a>.</li> <li><i>Relocation diffusion</i> occurs when the spreading <a href="/facts/Phenomenon/4CBrlVeW">phenomenon</a> migrates into new areas, leaving behind its origin or source of the disease.</li> <li><i>Contagious diffusion</i> is the spread of an infectious disease through the direct contact of individuals with those infected.</li> <li><i>Hierarchal diffusion</i> occurs when a phenomenon spreads through an ordered sequence of classes or places.</li> <li><i>Network diffusion</i> occurs when a disease spreads via transportation and social networks, "reflecting the geographical and social structuring of human interactions".<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></li> <li><i>Mixed diffusion</i> is a combination of contagious diffusion and hierarchal diffusion. <a href="/facts/AIDS/RqLIEMuJ">AIDS</a> is a prominent example in modern-day society of a mixed diffusion disease, often spreading along the hierarchal, network, and contagious diffusion patterns.<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a><a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a></li></ul> <p>The value of mapping and <a href="/facts/Geographic_Information_System/PoP1kVoa">Geographic Information Systems</a> (GIS) is becoming better known to public health professionals to help link disease control to prevention efforts, which can aid in developing better immunization programs.<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a> GIS is an excellent tool used to identify spatial patterns and core areas of disease transmission. Disease maps can distinguish the low and high risk areas, as well as highlight “physical and/or socio-cultural” factors that contribute to the causation of disease.<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> Understanding how a disease spreads gives health officials a better understanding of how to better serve the public. </p> <p>4. Rytkönen, Mika JP. “Not All Maps are Equal: GIS and Spatial Analysis in Epidemiology.” International Journal of Circumpolar Health 63:1, 2004: pp. 11 Available: <a href="http://www.circumpolarhealthjournal.net/index.php/ijch/article/viewFile/17642/20108">http://www.circumpolarhealthjournal.net/index.php/ijch/article/viewFile/17642/20108</a> </p> <h2 id="further-reading">Further reading</h2> <ul><li><a href="https://www.cdc.gov/gis/">Geographic Information Systems (GIS) at CDC</a>, Centers for Disease Control and Prevention, US.</li> <li><a href="https://www.atsdr.cdc.gov/gis/conference98/gisindex.html">GIS in Public Health</a>, Agency for Toxic Substances and Disease Registry (ATSDR), US.</li> <li>Clarke, Keith C; Sara L. McLafferty; Barbara J. Tempalski (April–June 1996). <a href="https://www.cdc.gov/ncidod/eid/vol2no2/clarke.htm">"On Epidemiology and Geographic Information Systems: A Review and Discussion of Future Directions"</a>. <i>Emerging Infectious Diseases</i>. 2 (2): 85–92. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.3201%2Feid0202.960202">10.3201/eid0202.960202</a>. <a href="/facts/PMC_(identifier)/dX1zMt71">PMC</a> <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2639830">2639830</a>. <a href="/facts/PMID_(identifier)/JlHAvMHt">PMID</a> <a href="https://pubmed.ncbi.nlm.nih.gov/8903207">8903207</a>. Retrieved 2007-12-25.</li> <li><a href="https://web.archive.org/web/20071205122045/http://www.cnn.com/HEALTH/library/ID/00004.html">Infectious diseases: How they spread, how to stop them</a>, CNN.</li> <li>Cashio, Cathy. <a href="https://web.archive.org/web/20080510144720/http://www.unt.edu/resource/04mappingfeature.htm">Mapping infectious disease outbreaks</a>, University of North Texas Resources Magazine 2004.</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Cromley, Ellen K. and Sarah L. McLafferty. GIS and Public Health. The Guilford Press, New York, 2002. pp. 189-209 <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Pyle, Gerald F. "Studies of Disease Diffusion." Applied Medical Geography. V.H. Winston & Sons, Washington, D.C., 1979: pp. 123 <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Walter, S.D. "Disease Mapping: a historical perspective." Spatial Epidemiology: Methods and Applications. Eds. P. Elliot, J.C. Wakfield, N.G. Best, and D.J. Briggs. Oxford University Press, 2000. pp. 225 <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Rytokonen, Mike, JP. "Not All Maps are Equal: GIS and Spatial Analysis in Epidemiology." International Journal of Circumpolar Health 63:1, 2004: pp. 11 <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Koch, Tom. Geographies of Disease: Maps, Mapping, and Medicine. ESRI Press. Redlands, California, 2005. Ch. 10, pp. 249-281 <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Hornsby, 2000 from Cliff et al. 1981: Pyle, 1979, 137 from Gould, 1969 <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Cromley, Ellen K. and Sarah L. McLafferty. GIS and Public Health. The Guilford Press, New York, 2002. pp. 189-209 <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Pyle, Gerald F. "Studies of Disease Diffusion." Applied Medical Geography. V.H. Winston & Sons, Washington, D.C., 1979: pp. 138 <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Pyle, Gerald F. "Studies of Disease Diffusion." Applied Medical Geography. V.H. Winston & Sons, Washington, D.C., 1979: pp. 139 <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Cromley, Ellen K. and Sarah L. McLafferty. GIS and Public Health. The Guilford Press, New York, 2002. pp. 192 <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Cromley, Ellen K. and Sarah L. McLafferty. GIS and Public Health. The Guilford Press, New York, 2002. pp. 192 <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Hornsby, Kathleen. "Spatial Diffusion: Conceptualizations and Formalizations." National Center for Geographic Information and Analysis and Department of Spatial Information Science and Engineering, University of Maine, 2000: Pyle, Gerald F. "Studies of Disease Diffusion." Applied Medical Geography. V.H. Winston & Sons, Washington, D.C., 1979: pp. 123-163 <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Cromley, Ellen K. and Sarah L. McLafferty. GIS and Public Health. The Guilford Press, New York, 2002. pp. 194 <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>Rytkonen, Mika, JP. "Not All Maps are Equal: GIS and Spatial Analysis in Epidemiology." International Journal of Circumpolar Health 63:1, 2004: pp. 18 <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> </ol>