host of reservoir host of A reservoir is a population, species or community (assemblage of different species in a given geographic area) in which a microorganism naturally occurs and is indefinitely maintained. Some zoonotic pathogens, particularly bacterial pathogens, may also have environmental reservoirs. Microorganisms with multiple reservoir species may be indefinitely maintained across the community of species even if they are not always present in each individual reservoir species. In the reservoir species or community, the microorganism may cause either asymptomatic infection or disease and this may vary among individuals. A pathogen may also be more genetically diverse in its reservoir host than in other taxa, in part because the pathogen is endemic to reservoir hosts. An individual of species Camelus dromedarius (commonly known as dromedary camels) is a reservoir host of an individual of Middle East respiratory syndrome–related coronavirus (MERS-CoV) since at least the 1980s. A relation between a host organism and a hosted organism in which the hosted organism naturally occurs in an indefinitely maintained reservoir provided by the host. has reservoir host Jorrit Poelen