1. A system for analyzing particles in a fluid, the system comprising: a flow chamber for receiving a sample of fluid to be analyzed; one or more detectors positioned to detect two different ranges of fluorescence produced by particles in the fluid in said flow chamber, said detectors generating a trigger signal whenever fluorescence is detected; a classifier training set containing organism type and feature values; and a support vector machine classifier training set including related to particle images, wherein feature values of captured images are calculated and the support vector machine classifier training set is applied to captured images to classify the particle associated with each image.