Gram-Negative Cocci (GNC) Bacteria: Introduction, List of Bacteria, and Related Footages

Introduction of Gram-Negative Cocci (GNC) Bacteria

Medically relevant Gram-Negative Cocci (GNC) Bacteria are Neisseria gonorrhoeae (causative agent of sexually transmitted disease), Neisseria meningitidis (causes meningitis), Moraxella catarrhalis (responsible for respiratory symptoms), Veillonella parvula (anaerobic gram-negative coccus cause osteomyelitis).

List of Gram-Negative Cocci Bacteria

S. No.
Bacteria
1.Neisseria gonorrhoeae
2.Neisseria meningitidis
3.Moraxella catarrhalis
4.Veillonella parvula
Table: Gram-Negative Cocci Bacteria

Footages of Gram-Negative Cocci Bacteria

Gram Negative Diplococci in Gram staining of Urethral Discharge

Gram Negative Diplococci in Gram staining of Urethral Discharge
Fig. Gram-Negative Diplococci intracellular as well as extracellular in Gram staining of Urethral Discharge at a magnification of 2000X

Neisseria gonorrhoeae colony morphology on chocolate agar

Neisseria gonorrhoeae colony morphology on chocolate agar
Fig. Neisseria gonorrhoeae colony morphology on chocolate agar

Neisseria oxidase test positive

Neisseria oxidase test positive
Fig. Neisseria oxidase test positive

Neisseria meningitidis colony morphology on blood agar

Neisseria meningitidis colony morphology on blood agar
Fig. Neisseria meningitidis colony morphology on blood agar (mixed growth- mucoid type)

Gram-negative diplococci of Neisseria meningitidis in Gram staining of culture

Gram negative diplococci of Neisseria meningitidis in Gram staining of culture
Fig. Gram-negative diplococci of Neisseria meningitidis in Gram staining of culture at a magnification of 1000X

Moraxella colony morphology on blood agar

Moraxella colony morphology on blood agar
Fig. Moraxella colony morphology on blood agar

Gram-negative cocci of Moraxella in Gram staining of culture

Gram negative cocci of Moraxella in Gram staining of culture
Fig. Gram-negative cocci of Moraxella in Gram staining of culture

Moraxella lacunata in Gram stain

Moraxella lacunata in Gram stain
Fig. Moraxella lacunata in Gram stain of culture at a magnification of 2000X

Further Readings

  1. Mackie and Mc Cartney Practical Medical Microbiology. Editors: J.G. Colle, A.G. Fraser, B.P. Marmion, A. Simmous, 4th ed, Publisher Churchill Living Stone, New York, Melborne, Sans Franscisco 1996.
  2.  Textbook of Diagnostic Microbiology. Editors: Connie R. Mahon, Donald G. Lehman & George Manuselis, 3rd edition2007, Publisher Elsevier.
  3. Manual of Clinical Microbiology. Editors: P.R. Murray, E. J. Baron, M. A. Pfaller, F. C. Tenover and R. H. Yolken, 7th ed 2005, Publisher ASM, USA
  4. Bailey & Scott’s Diagnostic Microbiology. Editors: Bettey A. Forbes, Daniel F. Sahm & Alice S. Weissfeld, 12th ed 2007, Publisher Elsevier.
  5. https://en.wikipedia.org/wiki/Gram-negative_bacteria
  6. Clinical Microbiology Procedure Handbook Chief in editor H.D. Isenberg, Albert Einstein College of Medicine, New York, Publisher ASM (American Society for Microbiology), Washington DC.
  7. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1829049/

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