October 14, 2025

Bellarmine University’s biology students are diving into a fascinating real-world challenge— how does the simplified and cost-effective “R-card” approach to detecting E. coli compare to the long-standing Idexx lab method? Guided by microbiology professor Dr. Kelly Carroll, this hands-on project is bridging classroom learning with community impact.

Kentucky Watershed Watch recently embraced the R-card method, which offers greater flexibility in sample logistics and helps cut costs. But how does it stack up against the tried-and-true lab techniques we’ve relied on for years? Enter Dr. Carroll and her dedicated team, eager to put their skills to work in service of science and the local waterways.

Students are learning valuable environmental microbiology techniques through the project. The team has already processed 44 samples by both R-card and Idexx methods, and early results are promising—both methods are performing well and show comparable results. Next, the students will dive into the statistical analysis to ensure the findings are rock solid. Once their final report is ready, we’ll share the full story and what it means for our future water testing efforts.

We extend our heartfelt thanks to Idexx for their generous donation of lab supplies, and to Bellarmine University for providing the lab space, expertise, R-cards, and for serving as a Louisville Support Hub. Your support makes this community-driven science possible!