JOHNE'S DISEASE IN A MOOSE (Alces alces)

and 35 days respectively after the first evidence of infection. Adult A. americanum, when fed as nymphs on an infected deer, are capable of transmitting Theileria infection to susceptible deer. The incubation time after allowing the ticks to feed on the susceptible deer was probably 14 days, however this cannot be concluded without considering the possibility that some ticks may have attached following the first release. The incubation time then would have been 21 days.