Achermann Y, et al. - While researchers identified a wide description of the role of Propionibacterium acnes in periprosthetic joint infection (PJI), insight into the capacity of Propionibacterium avidum to cause PJI was limited. Researchers conducted this work describing the largest series of P. avidum PJI predominantly located in the hip. P. avidum strains isolated in this study were phylogenetically similar to PJI strains isolated elsewhere suggesting that these invasive lineages might be common.