Natural plague foci in Russia

Plague circulates naturally in wild rodents and their fleas in certain landscapes. Animal outbreaks in these foci are a normal part of surveillance and are not the same as human cases.

A March 2026 review in Problems of Particularly Dangerous Infections (Popov et al.) found plague-infected animals in three of 11 natural foci in Russia. The full list of the 11 foci still needs to be imported from that paper.

Foci shown on the map

Locations are approximate and the list is not complete. Each entry is marked with its source.