ID#: 452
This map of United States, reveals geographic variation in the frequency of Navy recruits, reacting to a histoplasmin sensitivity test, between the years, 1958-1965. The injectable H-42 Histoplasmin antigen (National Communicable Disease Center histoplasmin. PD = Parke, Davis & Co) was given at a dilution of 1:100. Note that the vast majority of positive test results were clustered in the Midwestern and Southern U.S., producing reactions ranging from the low end of the spectrum at less than 0.5mm, to reactions greater than 8.0mm.Those cases in the Southwestern and Western U.S. produced, for the most part, reactions of 3.9mm or less.
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Content Provider(s): CDC/ Dr. Errol Reiss
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CDC Organization
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