This course will examine the biology of zoonotic agents and the implication of host-pathogen interactions to disease susceptibility and resistance. Students will apply these basic concepts towards the understanding of issues governing pathogenesis, pathology, epidemiology, control and surveillance of zoonotic diseases. Focus will be placed on zoonotic agents currently having a significant impact on animal and public health. Lectures will be followed by active discussion of selected readings. Scheduled classes are the same as for BIOL 409, but with additional assignments and evaluation appropriate to graduate studies. Prerequisite: consent of instructor. Credit cannot be obtained for both BIOL 409 and BIOL 509.