PLOS Pathogens reflects the full breadth of research in these areas by publishing outstanding original articles that significantly advance the understanding of pathogens and how they interact with their host organisms. Topics include (but are not limited to) adaptive and innate immune defenses as well as pathogen countermeasures, emerging pathogens, evolution, genomics and gene regulation, model host organisms, pathogen-cell biology, pathogenesis, prions, proteomics and signal transduction, rational vaccine design, structural biology, and virulence factors.

The journal will not consider purely descriptive studies, such as those that solely identify a new genomic sequence of a related pathogen or a series of related pathogens, the isolation of pathogen variants, or a new strain or type based only on sequence analysis or correlative studies of host and pathogen genotypes.