This weekend it was reported that 2 mice infected with Yersinia pestis, the causitive agent of plague, were missing from a lab at the University of Medicine and Dentistry of New Jersey (UMDNJ). In September 2005 it was also reported that 3 live mice infected with Y. pestis were missing from UMDNJ a lab. In this case however, the “missing mice” are actually the carcasses of mice who died during an experiment, were bagged and placed in a freezer for storage until the experiment was completed and they could be incinerated. It is believed that the missing bag of mice was accidentally sterilized along with another bag.
In both cases the FBI investigated and determined that there was no public health risk.