Chapter 13. Protozoans

  1. Michael H. Gerardi and
  2. Mel C. Zimmerman

Published Online: 28 JAN 2005

DOI: 10.1002/0471710431.ch13

Wastewater Pathogens

Wastewater Pathogens

How to Cite

Gerardi, M. H. and Zimmerman, M. C. (2004) Protozoans, in Wastewater Pathogens, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471710431.ch13

Author Information

  1. The Pennsylvania State University, USA

Publication History

  1. Published Online: 28 JAN 2005
  2. Published Print: 22 OCT 2004

Book Series:

  1. Wastewater Microbiology Series

Book Series Editors:

  1. Michael H. Gerardi

Series Editor Information

  1. The Pennsylvania State University, USA

ISBN Information

Print ISBN: 9780471206927

Online ISBN: 9780471710431



  • protozoans;
  • Cryptosporidium parvum;
  • Entamoeba histolytica;
  • Giardia lamblia;
  • verification of infection;
  • monitoring


The term “protozoan” is a common name of a single-celled, eukaryotic organisms that are either animal-like, funguslike, or plantlike. Protozoans also can be distinguished or grouped by their inability or ability to move with cilia (ciliates), flagella (flagellates), or pseudopodia (amobae). Protozoans that have no direct locomotive ability are coccidians. An important role performed by ciliates is the consumption of numerous, dispersed baceria from the bulk solution in the activated sludge process.