Streptococcus lactarius is a species of catalase-negative, Gram-positive, coccus-shaped bacteria from the genus Streptococcus. First reported in 2010, it was found growing in the breast milk of three non-related healthy women. Based on 16S rRNA gene sequences, it is most similar to S. peroris.
References
External links Type strain of Streptococcus lactarius at BacDive - the Bacterial Diversity Metadatabase