Escherichia coli O157:H7 strain PA20

Escherichia coli O157:H7 strain PA20 is a Gram-negative, rod-shaped bacterium characterized by its mobility and the presence of flagella. As a facultative anaerobe, it can thrive in both aerobic and anaerobic environments, making it adaptable to a variety of habitats. This strain is host-associated, primarily found in organisms such as Homo sapiens (humans), Bos taurus (cattle), Bos (bovines), Sus scrofa (swine), and Oryctolagus cuniculus (rabbits). E. coli O157:H7 strain PA20 has a mesophilic temperature range, with an optimal growth temperature of 37°C. It possesses a single replicon and is structured with two membranes, typical of Gram-negative bacteria. The bacterium exhibits a free-living biotic relationship, indicating its capacity to exist independently in various environments, although it often resides in the gastrointestinal tracts of its hosts. This strain of E. coli is notable for its health effects in humans, which can include diarrhea, hemorrhagic diarrhea, renal failure, anemia, and hemolytic uremic syndrome (HUS). These severe health implications underscore the strain's pathogenic potential, particularly in foodborne outbreaks. Understanding the ecological role of E. coli O157:H7 strain PA20 in various hosts can provide insights into its transmission dynamics and the public health risks associated with its presence in the food supply chain.