Analysis of the spatial distribution of cryptosporidiosis in AIDS patients in San Francisco using density equalizing map projections (DEMP).

Environmental transmission of cryptosporidiosis has occurred repeatedly in defined spatial areas during outbreaks of disease attributed, for example, to drinking water contamination. Little work has been done to investigate the possibility of cryptosporidiosis infection in defined spatial areas in non-outbreak (i.e.

Adult leukemia: a spatial analysis.

A simple and direct analysis of the spatial distribution of adult leukemia data results from a geopolitical map transformed to have a uniform density of the population at risk. Geographic displays and statistical assessments then lead to a series of informative descriptions of the observed spatial pattern for six sex- and age-specific categories of non-Hispanic white individuals. Using a statistical/graphical approach, no consistent pattern of disease is observed; however, indications emerge of isolated nonrandom influences among young females (ages 10-29 years).