In recent years, however, there has been one single host.

Several offspring may develop inside a single host but this species is not polyembryonic.

It is possible for a mite to be born, live, and die on a single host.

Beginning October 24, 2008, the show adopted a new format with a single host who summarized the week's events.

All the parasites of one species in a single individual host.

Up to 938,000 eggs have been reported from the liver of a single rodent host.

But it was necessary for him to spread out every so often to relieve the confinement of a single host.

However, since 2009, the show has had a single host.

There can be multiple instances for each type of process, either on a single host or spread over many hosts.

They can be dependent on a single host or a very special habitat.