Legionella pneumophila strain HH31

Legionella pneumophila strain HH31 is a pathogenic, Gram-negative bacterium that exhibits a rod shape and is motile due to the presence of flagella. This strain is classified as a chemoorganotroph, relying on organic compounds for energy, and is capable of aerobic respiration. It has a mesophilic temperature range, thriving in moderate temperature conditions. L. pneumophila strain HH31 is predominantly free-living but is also associated with various hosts, including humans (Homo sapiens), plants (Viridiplantae), and a variety of amoebae such as Acanthamoeba castellanii, Balamuthia mandrillaris, and Dictyostelium discoideum. The bacterium possesses a single replicon and is characterized by a double membrane structure. This strain is known for its pathogenicity in humans, causing conditions such as pneumonia, including community-acquired pneumonia (CAP) and Legionnaires' disease, as well as mild diseases like Pontiac fever. Its ability to infect a wide range of hosts, particularly amoebae, highlights its ecological versatility and adaptation strategies, which may play a role in its survival and proliferation in various environments. The interaction between L. pneumophila strain HH31 and its diverse hosts underscores the importance of understanding its ecological relationships, especially in contexts related to water systems where it may thrive and pose health risks.