| manufacturer's recall of rapid cartridge assay kits on the basis of false-positive cryptosporidium antigen tests--colorado, 2004. | the colorado department of public health and environment (cdphe) has determined that a fourfold increase in the number of reported cryptosporidiosis cases in colorado during january-february 2004 might be attributed primarily to false-positive test results. since january 1, 2004, a total of 13 in-state cases and one out-of-state case were reported to cdphe. during the previous 7 years, an average of three cases were reported during january-february. in eight of 14 patients, rapid testing was per ... | 2004 | 15017377 |