By Dwight D. Bowman (Associate Professor of Parasitology, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA)
By Jean Clobert (, Universite Pierre et Marie Curie, Paris), Etienne Danchin (, Andre A. Dhondt (, Cornell University, Ithaca), James D. Nichols (, Patuxent Wildlife Research Centre, Maryland)
