In Australia, animals such as koalas and possums are naturally infected.

It is also reported to naturally infect Ullucus tuberosus.

Other tick species have been shown to be naturally infected with R. rickettsii or serve as experimental vectors in the laboratory.

All of the viruses naturally infect gypsy caterpillars, but some do not always kill them in time to prevent them from eating leaves.

In contrast, brains from mice who are naturally infected with scrapie readily infect other mice.

These viruses naturally infect the cells that line the lung and they can be genetically altered so that they no longer cause illness.

This organism naturally infects the following species:

About 25 to 30 percent of nymph-stage deer ticks in the Northeast are naturally infected with the Lyme disease bacterium.

The Parachlamydiaceae naturally infect amoebae and can be grown in cultured Vero cells.

OFV is able to naturally infect around 50 different species in 31 genera, all belonging to the Orchidaceae family.