Streptococcus equi subsp. equi C 15, C15

Streptococcus equi subsp. equi C 15 (C15) is a Gram-positive bacterium characterized by its cocci shape and arrangement in pairs or chains. This organism is facultatively anaerobic, allowing it to thrive in varying oxygen conditions. C15 is non-motile and lacks flagella, indicating a stationary lifestyle. Temperature-wise, C15 is mesophilic, suggesting it prefers moderate temperatures for optimal growth. The bacterium has a single replicon, indicating a streamlined genomic structure. As a free-living organism, C15 interacts with a diverse range of hosts, including Homo sapiens (humans) and various members of the Equidae family, particularly Equus caballus (horses). The health effects associated with C15 are significant. It is known to cause a variety of infections, including meningitis, respiratory tract infections, strangles, mastitis, necrotizing myositis, and post-streptococcal glomerulonephritis. These conditions highlight the pathogenic potential of C15 in both human and equine populations. The presence of C15 in both humans and horses underscores its ecological role as a pathogen that can cross species barriers, leading to severe health outcomes. Understanding the traits of C15 may aid in developing effective treatment and prevention strategies for the infections it causes, emphasizing the importance of monitoring this bacterium in clinical and veterinary settings.