Five free-ranging tule elk in the Point Reyes National Seashore have tested positive for a lethal gut-wasting infection called Johne’s disease, the first positive results since the seashore began testing elk over a year and a half ago as part of its forthcoming ranch management plan. 

Johne’s disease infects both elk and cows, and can pass between the species, which are mingling more in recent years as two elk herds have grown and encroached on…