BactSNP

BactSNP is a software pipeline to address the critical need for accurate and sensitive single-nucleotide polymorphism (SNP) calling in bacterial genome studies. Given the immense diversity within bacterial species, whole-genome sequencing (WGS) has become a staple for analyzing genetic differences among isolates. Identifying SNPs between isolates is a foundational analysis in WGS studies, crucial for tasks like phylogenetic tree inference, especially in investigations of outbreaks where isolates are closely related.

The accurate identification of SNPs is paramount, as the performance of SNP-calling methods significantly impacts the reliability of downstream analyses. Traditional SNP callers, however, have struggled with a high rate of false positives, particularly when analyzing closely related isolates, which can undermine the accuracy of these analyses. In light of these challenges and the insufficient validation of various SNP callers in handling closely related isolates, BactSNP was developed to offer a more reliable alternative.

BactSNP stands out by utilizing assembly and mapping information to facilitate highly accurate and sensitive SNP calling in a single step. This approach enables it to efficiently call SNPs among isolates, regardless of whether the reference genome is a complete assembly, a draft version, or even absent. This flexibility makes BactSNP a potent tool for bacterial genome analysis, offering significant advantages over traditional methods in accuracy and sensitivity.