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

Gram Negative Diplococci in Gram staining of Urethral Discharge

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

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

Fig. Neisseria gonorrhoeae colony morphology on chocolate agar

Neisseria oxidase test positive

Fig. Neisseria oxidase test positive

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

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

Moraxella colony morphology on blood agar

Fig. Moraxella colony morphology on blood agar

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

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/
Medical Lab Notes

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Tags: BacteriaFootages of Gram-Negative Cocci BacteriaGram Negative bacteriaGram negative cocciGram negative cocci of Moraxella in Gram staining of cultureGram Negative Diplococci in Gram staining of Urethral DischargeGram negative diplococci of Neisseria meningitidis in Gram staining of cultureGram StainGram-Negative Cocci BacteriaGram-negative cocci of Moraxella in Gram staining of cultureGram-Negative Diplococci intracellular as well as extracellular in Gram staining of Urethral Discharge at a magnification of 2000XGram-negative diplococci of Neisseria meningitidis in Gram staining of culture at a magnification of 1000XIntroduction of Gram Negative Cocci (GNC) BacteriaList of GNCList of Gram-Negative Cocci BacteriaMedicallabnotesMedlabsolutionsMedlabsolutions9MicrohubMoraxella colony morphology on blood agarMoraxella lacunata in Gram stainMoraxella lacunata in Gram stain of culture at a magnification of 2000XmruniverseiNeisseria gonorrhoeae colony morphology on chocolate agarNeisseria meningitidis colony morphology on blood agarNeisseria meningitidis colony morphology on blood agar (mixed growth- mucoid type)Neisseria oxidase test positiveUniverse84a
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