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  1. Streptococcus - Wikipedia

    Streptococcus ... 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 - Infectious Diseases - MSD Manual ...

    Dec 24, 2021 · Three different types of streptococci are initially differentiated by their appearance when they are grown in culture on sheep blood agar: Beta-hemolytic streptococci produce zones of clear …

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

    Dec 19, 2025 · Streptococcus, (genus Streptococcus), group of spheroidal bacteria belonging to the family Streptococcaceae. The term streptococcus (“twisted berry”) refers to the bacteria’s …

  5. Streptococcal Infections - Infections - Merck Manual Consumer Version

    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 …

  6. Streptococcal Infections: Causes, Symptoms, and Treatment

    Streptococcus is a genus of bacteria responsible for many human infections. Known for its diverse types and the array of diseases it can cause, understanding streptococcus is crucial for effective diagnosis, …

  7. The Different Types of Streptococci (Strep Bacteria)

    Oct 23, 2025 · Streptococcal infections are any kind of infection caused by the streptococcal, or “strep,” type of bacteria. Also called streptococci, these bacteria are divided into group A, group B, group...

  8. Streptococcus: Characteristics, Classification and Clinical Importance

    Streptococcus is a genus of Gram-positive, spherical bacteria (cocci) that typically arrange themselves in chains of varying lengths, though some may appear in pairs. These bacteria are facultative …

  9. 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 inflammatory …

  10. Streptococcus | Diagnosis & Disease Information

    Jan 25, 2024 · Examine the pathology, including evaluation, diagnosis, and treatment, of streptococcus and streptococcal infections.