The problem is that with cultures costing anywhere from twenty-five to forty dollars each, it is a very expensive proposition for the animal facility environment. Brucellosis is one which has been reported in some dog breeding colonies. The organism is available in copious amounts at the time of parturition in dogs and in other species which harbor brucella, but it is also shed in urine so urinary contact can cause the spread of that disease. Cat-scratch disease is better defined now that that organism has been isolated and characterized. This is something that is fairly common among cats, especially young cats.
Leptospirosis is pretty much unheard of in the laboratory animal facility.
With the great number of pigs and other animals coming directly off farms into animal facilities for acute surgical procedures, one has to wonder when we will see this organism again. Anecdotally, I have heard of several technicians who contracted leptosirosis just through that means. Plague is mostly associated with wild animals, and rat bite fever is something you would have to consider with any rodent bite. There are a number of different fungi that can be harbored both clinically and subclinically. They cause a ringworm like condition.