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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 ...

    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. 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...

  7. 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, …