Schistosoma mansoni: Use of a fluorescent indicator to detect nitric oxide and related species in living parasites Andrea B. Kohn 1 , Jeanne M. Lea 1 , Leonid L. Moroz 1, 2 , and Robert M. Greenberg 3 1 Whitney Laboratory for Marine Bioscience and 2 Department of Neuroscience University of Florida 9505 Ocean Shore Boulevard St. Augustine FL 32080 USA 3 Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 USA Corresponding author: Robert M. Greenberg (508) 289-7910 (508) 540-6902 (FAX) rgreenberg@mbl.edu Running Title: NO in S. mansoni * Manuscript