Big study raises worries about bees trading diseases

Pathogens may jump from commercial colonies to the wild

DISEASE MIX  Parasites and viruses found in honeybees can also infect bumblebees (one shown).

M.A. Fürst

Commercial bees in stressful, often unhygienic working conditions may spread their pathogens to wild pollinators, a large study suggests.

These are tough times for bees, both in the wild and in colonies that commercial beekeepers and farmers manage.