Enteric pathogens and opportunistic gut bacteria

Enteric pathogens and opportunistic gut bacteria represent a diverse group of microorganisms that reside in or transit through the human gastrointestinal tract. Enteric pathogens, such as Salmonella and Clostridioides difficile, are primary causes of infectious diarrhea and colitis, often acquired through contaminated food or water (NIH, 2023). Opportunistic bacteria, including certain strains of Escherichia coli and Enterococcus, are typically commensal but can become pathogenic under conditions of dysbiosis or host immunosuppression (Nature Reviews Microbiology, 2020). These organisms are the primary targets for antibiotic treatments, which aim to eradicate pathogens or reduce the overgrowth of harmful species (StatPearls, 2023). However, the use of broad-spectrum antibiotics can lead to collateral damage to beneficial microbiota, potentially resulting in secondary infections or the development of antimicrobial resistance (CDC, 2022). Modern therapeutic strategies also include probiotics and fecal microbiota transplantation to restore a healthy microbial balance (Gastroenterology, 2021). These interventions focus on modulating the entire microbial community rather than targeting a single molecular pathway.

Other names

Gut microbiotaIntestinal pathogensEnteric bacteriaOpportunistic pathogensGastrointestinal flora

Antibiotics inhibit essential bacterial processes like cell wall synthesis, protein synthesis, and DNA replication (StatPearls, 2023). Probiotics and fecal microbiota transplants work through competitive exclusion, production of antimicrobial peptides, and restoration of the intestinal barrier (Nature Reviews Microbiology, 2020).