| Description | Streptococcus gordonii is a Gram-positive, catalase-negative bacterium that thrives in a temperature range of 20-40°C, preferring mesophilic conditions. As a heterotroph, it obtains its energy by breaking down organic compounds, specifically carbohydrates, proteins, and fats. This microbe produces energy through aerobic respiration, utilizing oxygen as its terminal electron acceptor. The Gram stain reaction reveals a positive result, indicating the presence of a thick peptidoglycan layer in the bacterial cell wall. S. gordonii is a coccus, meaning it has a spherical shape when viewed under a microscope. This microbe is widely distributed across the human body, colonizing various body sites, including the mouth, throat, skin, and gastrointestinal tract. In fact, S. gordonii is one of the most common human-associated bacteria, often found in the oral cavity, where it plays a role in the normal flora. As an obligate aerobe, S. gordonii requires oxygen to survive and grow, and its growth is inhibited in the absence of oxygen. S. gordonii has been implicated in various human diseases, including respiratory tract infections, skin infections, and dental caries. However, it also has beneficial properties, such as the ability to adhere to teeth and prevent the establishment of pathogenic bacteria. Furthermore, S. gordonii has been investigated as a potential vector for oral vaccines, as it can deliver antigenic proteins to the oral mucosa. In addition, studies have shown that S. gordonii can contribute to the development of biofilms on dental surfaces, influencing the complex interactions between bacteria and the host. Overall, Streptococcus gordonii is a ubiquitous and versatile microbe that plays a significant role in human oral health and disease. |
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