Acute meningitis complicated with ventriculitis caused by Streptococcus dysgalactiae subsp. dysgalactiae.

Streptococcus dysgalactiae subspecies dysgalactiae (SDSD), also known as Lancefield group C streptococcus, is a pathogen found in animals. It is known to cause pyogenic infections in animals and is one of the most common pathogens that can cause mastitis in cattle. Very few reports of SDSD causing human diseases to have been reported in the literature, but we report a case of community-acquired meningitis and pyogenic ventriculitis caused by SDSD. This report is the first case of SDSD causing a central nervous system (CNS) infection in humans and aims to raise awareness about the role of SDSD in CNS infections. It also seeks to promote the recognition of this bacteria as a potential cause of invasive diseases.