Machine derived contents note: Series Preface. -- Preface. -- The Series Editor - Philippe Quevauviller. -- List of Contributors. -- Part One: Sanitary and Technical Aspects. -- Presence of Algae, Protozoa, Helminths in the Water Environment: Significance, Sanitary Implications and Preventive Measures (Kanitz and Franco). -- Water Potabilization Plant in the Presence of Algae, Protozoa and Helminths (Coccagna and Ziglio). -- Biological Methods in Managing Problems in Water Works and Distribution Systems (A. Sld̀eckov)̀. -- Part Two: Algae and Helminths. -- An Overview of Counting Methods for Algae (G. Bowe). -- Extraction and Determination of Chlorophylls (G. Bowe). -- Phytoplankton Analysis Using Flow Cytometry (S. Sgorbati). -- Methods for Cyanobacterial Toxin Detection (Rapala and Lahti). -- Hygiene and Health Aspects and Interpretation of Data Related to the Presence of Helminths in Water for Human Consumption (L. Bonadonna and G. Bezziccheri). -- Part Three: Protozoa. -- Pathogenic Protozoa in Fresh and Drinking Water (D. Gold and H. Smith). -- An Overview of Concentraction Techniques for Giardia and Cryptosporidium (E. Carraro). -- An Overview of Identification Methods in Use for Giardia and Cryptosporidium (E. Carraro and F. Palumbo). -- Viability of Cryptosporidium Oocysts and Giardia Cysts (J. O'Grady and H. Smith). -- References. -- Index