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Base excision repair pathways of bacteria: new promise for an old problem.

Infectious diseases continue to be a major cause of human mortality. With the emergence of drug resistance, diseases that were long thought to have been curable by antibiotics are resurging. There is an urgent clinical need for newer antibiotics that target novel cellular pathways to overcome resistance to currently used therapeutics. The base excision repair (BER) pathways of the pathogen restore altered bases and safeguard the genomic integrity of the pathogen from the host's immune response. Although the BER machinery is of paramount importance to the survival of the pathogens, its potential as a drug target is largely unexplored. In this review, we discuss the importance of BER in different pathogenic organisms and the potential of its inhibition with small molecules.