“Leptospirosis is out and Dengue is in” – these are the words of the Sarvodaya Research Assistant – Pubudini weerakoon – working in Kurunegala District of Sri Lanka on the real-time biosurveillance program (RTBP). This report on Leptospirosis in Sri Lanka gives a full account of the past events. The aim of the RTBP is to gather patient case information through the m-Healthsurvey mobile application and subject that data to real time analysis for rapid detection of emerging health events. The automated analytic and detection is driven by the T-Cube software, developed by Carnegie Mellon Universities Auton Lab, based on data mining principles. We took the weekly epidemiological reports (WER) from the past two years and put T-Cube to the test.