The invention provides nucleic acid sequences which are complementary, in one embodiment, to a wide variety of Rat genes. The remote monitoring station may be adapted to identify many different biological particles and is not limited to particular predetermined biohazard profiles. In certain embodiments, the receiving user remotely inputs a designated country into the paging system so that when the receiving user is paged, the paging system first pages the receiving user in the designated country or area without broadcasting the paging message in other countries or areas.