A Comprehensive Review on the Molecular Basis of Microbial Pathogenesis of Viral and bacterial infections

Research on microbial infections determines both the immediate and long-term interactions between specific microorganism and their hosts. Microbial pathogenesis is a complex phenomenon involving the interaction between microbial virulence factors and host cellular responses. These virulence factors include invasins, capsules, siderophores, enzymes, endotoxins, and exotoxins.Though the main problem in the current scenario is the coinfection. Beyond initiating infection, these factors also help the pathogenic microbes survive and thrive within the host’s environment. Understanding the molecular mechanisms of microbial infections is essential for developing effective treatments, preventive measures, and vaccines. This review delves into how microbial pathogens invade host cells, evade the immune system, and establish infections. It also covers mechanisms of immune evasion, such as antigenic variation, mimicry, and the manipulation of host signaling pathways, utilizing advanced molecular biology techniques like CRISPR-Cas9 gene editing, transcriptomics, and proteomics. Additionally, it focuses on the key molecular interactions between viral and bacterial pathogen induced infections like respiratory co-infection and secondary bacterial pneumonia in patients with covid-19. DOI - https://doi.org/10.65525/SVUP.9788199565487.2026.51-62.