Loading...
Please wait, while we are loading the content...
Performance characteristics of a polyclonal enzyme immunoassay for the quantitation of Histoplasma antigen in human urine samples.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cloud, Joann L. Bauman, Sean K. Neary, Brandon Ludwig, Katie G. Ashwood, Edward R. |
| Copyright Year | 2007 |
| Abstract | An antigen detection assay was prepared with rabbit anti- Histoplasma antibodies to detect and quantitate Histoplasma capsulatum antigen in urine samples. By using a 4-parameter curve fit, the assay calibration ranges from 2 to 1,000 enzyme immunoassay (EIA) units. We compared results for 99 urine samples with those of a reference laboratory, half of which tested positive or equivocal by that reference laboratory. Performance characteristics were further defined by studying the assay linearity, precision, percentage of positive agreement, and percentage of negative agreement. An acceptable correlation with the reference laboratory (R2=0.7174) was obtained with results ranging from less than 2 (negative samples) to 132 EIA units by the new method. Compared with the reference laboratory, the percentage of agreement for positive samples, excluding equivocal samples, was 92% and for negative samples was 98%. Crossreactivity occurred with culture filtrates of Paracoccidioides brasiliensis, Coccidioides immitis, and Blastomyces dermatiditis. No cross-reactivity was observed with Candida albicans or Aspergillus fumigatus culture filtrates. The current EIA for the detection and quantitation of H capsulatum antigen in urine specimens is a valid assay that agrees well with results from an established reference laboratory. |
| Starting Page | 18 |
| Ending Page | 22 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1309/Q7879TYDW5D93QK7 |
| PubMed reference number | 17580268 |
| Journal | Medline |
| Volume Number | 128 |
| Issue Number | 1 |
| Alternate Webpage(s) | https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/ajcp/128/1/10.1309/Q7879TYDW5D93QK7/2/ajcpath128-0018.pdf?Expires=1491642809&Key-Pair-Id=APKAIUCZBIA4LVPAVW3Q&Signature=B-tMDcfO2S48GnkjuneM5eV21KnrK-8xTzN584bZDq3suwdyrwgOdDKl2dWBaJYFZlD71O4nQ4jKI3n1uCw-d2czYSMkHM9ytKriMrfOMH-Fk~ZpiuW5Qxp5AOqfdD7dKEqKpfbBGU1SH3Tgc0Pq0~STYZzL~o--V0CSQRW7zAre5JJhE-SCfgRjbBOUIXXZUklZiOINAQiNaJXprKPsOSaPi1jMreShVF2KaPMw8GpxQlE69lQ0jUcZtMV9wqnyxXtVpuYiBVPFtzxngEOTahBfX82Wu-p12j3p0biF-WQgSvw4pInnDFnrS-kqcb3dAqFYD3EpBgAXbDsT6vEeSw__ |
| Journal | American journal of clinical pathology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
