Legionella pneumophila strain HH13

Legionella pneumophila strain HH13 is a Gram-negative, mesophilic bacterium that is rod-shaped and exhibits mobility due to the presence of flagella. This organism is classified as a chemoorganotroph, relying on organic compounds for energy. It is aerobic, requiring oxygen for growth, and typically exists in a free-living state. The strain is notably associated with various hosts, including Homo sapiens, several amoebae species such as Acanthamoeba castellanii and Balamuthia mandrillaris, as well as Viridiplantae and Dictyostelium discoideum. This diverse host range suggests that Legionella pneumophila can adapt to various ecological niches, which may facilitate its survival and pathogenic potential. Legionella pneumophila strain HH13 is known for its pathogenicity in humans and animals, being responsible for several health conditions such as pneumonia, specifically Legionnaires' disease and community-acquired pneumonia (CAP). It can also lead to more severe conditions like infectious endocarditis. The strain does not form spores, which may influence its transmission dynamics and environmental persistence. The presence of this bacterium in various environmental and host-associated settings highlights its ecological versatility and pathogenic potential. Its ability to thrive in diverse habitats, combined with its association with amoebae, underscores the importance of understanding its biology for public health, particularly in preventing outbreaks of legionellosis.