Streptococcus anginosus
is an often overlooked and understudied emerging pathogen inhabiting many areas of the human body. Through our sequencing of
S. anginosus
strains isolated from the female bladder microbiota, we detected numerous prophage sequences. Bioinformatic analysis of these sequences identified 17 distinct groups of
S. anginosus
prophages. The majority of these phages exhibit no sequence homology to previously characterized temperate or virulent phage sequences, indicating an unexplored diversity of
Streptococcus
phages. By culturing these bacterial isolates, we confirmed that the prophages of five of these groups are capable of induction. One of these putative phages was imaged, the first such evidence of an
S
.
anginosus
virus-like particle; it exhibits morphological characteristics of siphoviruses.