You may be interested in a book called Medical Herpetology which covers
in some depth zoonoses between amphibians, reptiles and humans; it is
heavily referenced so its biblio can point you in many directions on
your subject. The book costs $19.95 plus 2.50 pp from NG Publishing,
RD3, Box 3709A, Rte 61 HwyN, Pottsville, PA 17901.