Streptococcus constellatus subsp. pharyngis SK1060 = CCUG 46377

Streptococcus constellatus subsp. pharyngis SK1060 = CCUG 46377 is a gram-positive, spherical-shaped bacterium that thrives optimally at human body temperature, making it a mesophilic organism. This microbe functions as a chemoheterotroph, relying on organic compounds for both energy and carbon, and it exhibits facultative anaerobic behavior, allowing it to grow in the presence or absence of oxygen. As a member of the Streptococcus genus, S. constellatus subsp. pharyngis is predominantly found in the human oral cavity and upper respiratory tract. It can inhabit various body sites, including the throat, saliva, and dental plaques, where it contributes to the complex microbiome. Its ability to adjust to different environments, together with its facultative anaerobic nature, enables it to thrive in diverse habitats, including niches with fluctuating oxygen levels. The biochemical capabilities of S. constellatus subsp. pharyngis allow it to ferment carbohydrates, producing lactic acid as a primary byproduct, which plays a significant role in oral health by inhibiting the growth of pathogenic bacteria. Moreover, its presence in the throat signifies its potential to be an opportunistic pathogen, particularly in immunocompromised individuals, where it may be associated with conditions such as pharyngitis or infections following dental procedures. Additionally, this bacterium is the subject of ongoing research due to its role in human health and diseases. For instance, its interactions within biofilms and its potential pathogenicity in various conditions highlight its significance as a probiotic candidate, aimed at enhancing oral health and maintaining a balanced microbiome.