cocci etymology

Etymology and Origin of "Cocci"

The term "cocci" is derived from the Greek word "κόκκος" (kokkos), meaning "berry" or "grain."

Meaning of "Cocci" in Microbiology

In bacteriology, "cocci" refers to a group of bacteria that are spherical or ovoid in shape. Cocci are typically 0.5-1.0 micrometers in diameter and can be classified according to their arrangement:

  • Diplococci: Cocci arranged in pairs
  • Streptococci: Cocci arranged in chains
  • Staphylococci: Cocci arranged in clusters
  • Tetracocci: Cocci arranged in groups of four
  • Sarcinae: Cocci arranged in cubic packets

Examples of Cocci

Notable examples of Gram-positive cocci include:

  • Staphylococcus aureus
  • Streptococcus pneumoniae
  • Streptococcus pyogenes

Examples of Gram-negative cocci include:

  • Neisseria gonorrhoeae
  • Neisseria meningitidis
  • Moraxella catarrhalis

Medical Significance

Cocci are medically significant as they can cause a wide range of infections, including:

  • Pneumonia
  • Meningitis
  • Endocarditis
  • Sepsis
  • Skin and soft tissue infections

Understanding the characteristics and classification of cocci is essential for accurate diagnosis, treatment, and prevention of bacterial infections.

cocci relate terms

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