Due to the advent of AIDS, there is currently great interest in opportunistic infections in people with compromised immune systems. This special volume of Advances in Parasitology<$> provides a detailed account ofthe pathogens associated with human enteric diseases, Cryptosporidium parvum, Enterocytozoon bieneusi<$> and Cyclospora cayetanensis<$>. This volume is essential for all parasitologists working on opportunistic protozoa.
