I should have explained our cleaning policy better.
Every effort is made to prevent cross contamination.
But when you work with 7 bullfrogs and 20 snakes and other various herps, it gets hard to wash and sanitize hands after every animal. I took over this position from someone who really didn't try to keep the animals healthy, he considered them disposable. I am really surprised by the resilience of amphibians in less than optimal conditions. Still I have noticed that when one animal gets sick, the next one does too. I looking farther into this subject, hopefully Gary will provide some insight through email.