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  1. Streptococcus - Wikipedia

    Streptococcus, from Ancient Greek στρεπτός (streptós), meaning "twisted", and κόκκος (kókkos), meaning "grain", is a genus of gram-positive spherical bacteria that belongs to the family …

  2. Streptococcal Infections | Strep Throat | MedlinePlus

    Jun 29, 2025 · Streptococcal is a type of bacteria that can cause strep throat (group A) or blood infections (group B). Learn how they can be prevented and treated.

  3. Streptococcal Infections: Causes, Symptoms, and Treatment

    Understanding Streptococcal infections Streptococcus is a genus of bacteria responsible for many human infections. Known for its diverse types and the array of diseases it can cause, …

  4. Streptococcal Infections - Infectious Diseases - MSD Manual ...

    Dec 24, 2021 · Streptococci are gram-positive aerobic organisms that cause many disorders, including pharyngitis, pneumonia, wound and skin infections, sepsis, and endocarditis. …

  5. The Different Types of Streptococci (Strep Bacteria)

    Oct 23, 2025 · There are several kinds of streptococci bacteria, causing problems ranging from a sore throat to life-threatening infections of the blood or organs. Learn how they vary and how …

  6. Streptococcus | Definition, Species, & Disease | Britannica

    Nov 12, 2025 · Streptococcus pneumoniaeScanning electron micrograph of Streptococcus pneumoniae. Streptococcus pneumoniae, also called pneumococcus, is an important human …

  7. Streptococcus: Characteristics, Classification and Clinical ...

    Streptococcus: Characteristics, Classification and Clinical Importance General Characteristics Streptococcus is a genus of Gram-positive, spherical bacteria (cocci) that typically arrange …

  8. About Group A Strep Infection | Group A Strep | CDC

    Jul 31, 2025 · Group A Streptococcus (group A strep bacteria) can cause many different infections. These infections range from minor to more serious. These bacteria can also cause …

  9. Streptococcal Infections - Infections - Merck Manual Consumer ...

    Streptococcal infections are caused by any one of several species of Streptococcus. These gram-positive, sphere-shaped (coccal) bacteria (see figure How Bacteria Shape Up) cause many …

  10. Strep throat - Symptoms & causes - Mayo Clinic

    Nov 30, 2022 · Strep throat is a bacterial infection that can make your throat feel sore and scratchy. Strep throat accounts for only a small portion of sore throats. If untreated, strep …