Haemophilus parainfluenzae strain ATCC 9796

Haemophilus parainfluenzae strain ATCC 9796 is a Gram-negative bacterium that exhibits a rod shape and is classified as an aerobe, though it can also survive in facultative anaerobic conditions. This strain is host-associated, primarily found in Homo sapiens, which indicates a strong correlation with human health. It possesses two membranes and is characterized by the presence of flagella, although it is non-motile. This bacterium thrives in mesophilic temperatures, suggesting that its optimal growth occurs within a moderate temperature range, typical for many human pathogens. Notably, H. parainfluenzae is free-living, which may allow it to persist in various environmental niches associated with human hosts. The health implications of H. parainfluenzae are significant, as it is associated with various serious infections, including bacteremia, pneumonia, endocarditis, infective endocarditis, purulent pericarditis, acute bacterial meningitis, and chancroid. The potential for causing such diverse and severe health issues underscores the importance of understanding this organism in clinical microbiology. In summary, Haemophilus parainfluenzae strain ATCC 9796 serves as an important reminder of the role that host-associated bacteria play in human health, particularly in relation to opportunistic infections. Its free-living nature and ability to thrive in human hosts highlight the complex interactions between bacteria and their hosts, emphasizing the need for continued research into the ecological and pathogenic behaviors of such microorganisms.