 This propensity enabled him to accomplish an enormous amount of work, as demonstrated by the fact that during his lifetime he authored or co-authored more than 500 publications, edited many more and directed the translation of over 1,800 scientific papers and books.He was at one time or another a member of more than 30 professional societies, served in a volunteer capacity in at least 20 professional and editorial posts, lectured on countless occasions to scientific groups, participated in the graduate training of a number of students, and built and managed for many years an outstanding Department of Medical Zoology at NAMRU-3 in Cairo.His collaborators included such renowned parasitologists as Dr. Gertrud Theiler and Dr. Jane Brotherton Walker.