The lower human colon is the primary reservoir for S. aureus ; therefore, the organism is a common sewage contaminant.

Lake Washington is the primary reservoir for the city of Newburgh, New York.

Lake Mead, formed by Hoover Dam, is the primary reservoir in the Colorado River basin.

Most common in central and western Africa, where humans are thought to be the primary reservoir.

Most common in southern and eastern Africa, where game animals and livestock are thought to be the primary reservoir.

These people are usually the primary reservoir for person-to-person transmission.

They may also serve as a primary reservoir for Coxiella burnetii, infection is transmitted among them by ticks.

Mice are the primary reservoir for the bacteria; Ixodes ticks then transmit the B. burgdorferi infection to deer.

Humans are the primary reservoir for Loa loa.

ABLV is distributed throughout Australia in a variety of bat species which are believed to be the primary reservoir for the virus.