Klebsiella pneumoniae subsp. pneumoniae strain 55

Klebsiella pneumoniae subsp. pneumoniae strain 55 is a notable Gram-negative bacterium primarily associated with human hosts. This strain exhibits a rod shape and can be found in various arrangements, including chains, pairs, and singles. As a facultative anaerobe, it can thrive in both the presence and absence of oxygen, allowing it to adapt to diverse environments within the host. The bacterium is classified as a chemoheterotroph, utilizing organic compounds as an energy source, which is typical for many pathogenic bacteria. It possesses flagella, enabling mobility, which may contribute to its ability to colonize and infect host tissues. Optimal growth occurs at 37°C, aligning with human body temperature, and it thrives within the mesophilic temperature range. K. pneumoniae subsp. pneumoniae strain 55 is nonsporulating and has a biotic relationship characterized as free-living, indicating it can exist independently in its environment, yet it is also implicated in human diseases, specifically pneumonia and community-acquired pneumonia (CAP). The strain has a single replicon and is encased within two membranes, consistent with its classification in the Enterobacteriaceae family. Given its pathogenic potential and its role in respiratory infections, K. pneumoniae strain 55 exemplifies the interplay between microbial adaptation and human health. Understanding its characteristics can inform treatment strategies for infections it may cause, highlighting the importance of monitoring such strains in clinical and environmental settings.