Escherichia coli O103:H2 str. 12009

Escherichia coli O103:H2 str. 12009 is a Gram-negative bacterium characterized by its rod shape, a temperature preference for mesophilic conditions (optimal growth at 37°C), and is classified as a heterotroph. This microbe is a facultative anaerobe, capable of thriving in both aerobic and anaerobic environments. As a Gram-negative organism, E. coli O103:H2 str. 12009 possesses a thin peptidoglycan layer surrounded by an outer membrane, which contains lipopolysaccharides. This structure plays a crucial role in its pathogenicity and resistance to certain antibiotics. Its rod-shaped morphology allows for motility, aided by flagella, which facilitates colonization and biofilm formation on various surfaces. Being mesophilic, this strain optimally grows at human body temperature, making it well-suited for life in the intestinal tract of warm-blooded animals, including humans. As a heterotroph, E. coli O103:H2 str. 12009 relies on organic compounds for energy and carbon sources, primarily deriving nutrients from the host's gut environment. As a facultative anaerobe, it can grow in the presence or absence of oxygen. This adaptability enables it to survive in different habitats, including the intestines, where it can exploit a variety of organic substrates. Beyond the gut, E. coli can be found in various environments, such as soil, water, and food sources, which increases its potential to enter the food chain and impact human health. In terms of pathogenicity, E. coli O103:H2 is notable for its association with foodborne illness outbreaks, particularly those linked to contaminated beef and leafy greens. Strain O103:H2 produces Shiga toxin, leading to hemolytic uremic syndrome (HUS) in severe cases, emphasizing the importance of food safety and hygiene practices to prevent infections caused by this strain.