Salmonella enterica subsp. enterica serovar Typhi strain 5740

Salmonella enterica subsp. enterica serovar Typhi strain 5740 is a significant pathogen primarily associated with human hosts, particularly Homo sapiens, and to a lesser extent, Pteropodidae. This bacterium is a Gram-negative, microaerophilic chemoorganotroph that exhibits a spirilla shape and typically arranges itself in chains or singles. Notably, it possesses flagella, which contribute to its motility, although it is characterized as non-motile in practical terms. Strain 5740 thrives optimally at 37°C, placing it within the mesophilic temperature range, which aligns with the human body temperature and its typical habitat. It has a single replicon and is surrounded by two membranes, consistent with its classification within the Gram-negative bacteria. This strain is associated with serious health effects, including acute cholecystitis, bloodstream infections, typhoid fever, and enteric fever, highlighting its role as a significant public health concern. The biotic relationship of strain 5740 is classified as free-living, yet its primary pathogenic interactions occur within host organisms. Understanding the characteristics of Salmonella enterica serovar Typhi strain 5740 underscores its adaptation to human hosts and its potential for causing disease. The bacterium's microaerophilic nature and optimal growth temperature suggest a specialization for survival in the human gastrointestinal tract, where it can evade the immune response and establish infections. This adaptability emphasizes the importance of environmental conditions in the ecology of pathogenic bacteria.