rRNA Hybridization Assay for Cryptosporidium

EPA Contract Number: 68D70022
Title: rRNA Hybridization Assay for Cryptosporidium
Investigators: Ray, Bryan L.
Small Business: SymBiotech Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1997 through March 1, 1998
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1997) RFA Text |  Recipients Lists
Research Category: Ecological Indicators/Assessment/Restoration , SBIR - Monitoring , Small Business Innovation Research (SBIR)


Current methods of testing water supplies for Cryptosporidium parvum are inadequate. The lack of a reliable test led the EPA to postpone enactment of its Information Collection Rule for 2 years. The rule was recently enacted, despite any further development in testing methodologies. The EPA-approved test detects between 5% and 21% of the total Cryptosporidium known to be present in a sample.

This Phase I project will develop a simple nucleic acid hybridization assay for Cryptosporidium. The assay will use proprietary substrates, which can increase assay sensitivity, compared with conventional substrates, by 10-fold or greater. This study should result in a sensitive hybridization assay that can simultaneously assay multiple samples while meeting EPA's limit of detection of 1,000 oocysts per 100 liters of water. Similar technology also can be applied to detecting Giardia, E. coli, and C. perfringens.

Supplemental Keywords:

small business, SBIR, monitoring, engineering., RFA, Scientific Discipline, Water, Ecosystem Protection/Environmental Exposure & Risk, Ecosystem/Assessment/Indicators, Ecosystem Protection, Monitoring/Modeling, Ecological Effects - Environmental Exposure & Risk, Environmental Microbiology, Ecological Effects - Human Health, Environmental Monitoring, Drinking Water, Environmental Engineering, Ecological Indicators, E. coli monitoring, monitoring, nucleic acid hybridization, assays, water supply, E. Coli, yeast mutant, cryptosporidium , microbial risk management, sampling, Giardia Spp, hybridization, Giardia, r RNA hybridization assay

Progress and Final Reports:

  • Final