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Gram staining

microbiological method for identification; method of staining used to differentiate bacterial species into two large groups (gram-positive and gram-negative)
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Summary

Gram staining is a medical test type[1]. It draws 5,553 Wikipedia views per month (medical test type category, ranking #7 of 59).[2]

Key Facts

  • Discoverer or inventor: Hans Christian Gram[3]
  • Named after: Hans Christian Gram[4]
  • Subclass of: microbiological test[5], staining[6]
  • Commons category: Gram stains[7]
  • Topic's main category: Category:Gram stains[8]
  • Described by source: Enciclopedia universal ilustrada europeo-americana (1908-1930)[9]
  • Main Wikidata property: P2597[10]
  • NCI Thesaurus ID: C23014[11]
  • Uses: crystal violet[12], iodine[13], ethanol[14], basic red 2[15], acetone[16], Carbol fuchsin[17]
  • Disjoint union of: list of values as qualifiers[18]

Why It Matters

Gram staining has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[19] It is known by 126 alternative names across languages and contexts.[20]

Related Entities

Hans Christian Gram

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] ↑ . Wikidata sitelinks. wikidata.org.
  3. [20] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Gram staining. Retrieved October 14, 2026, from https://4ort.xyz/entity/gram-staining
MLA “Gram staining.” 4ort.xyz Knowledge Graph, 4ort.xyz, 14 Oct. 2026, https://4ort.xyz/entity/gram-staining.
BibTeX @misc{4ortxyz_gram-staining_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Gram staining}}, year = {2026}, url = {https://4ort.xyz/entity/gram-staining}, note = {Accessed: 2026-10-14}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Gram staining — https://4ort.xyz/entity/gram-staining (retrieved 2026-10-14)

Canonical URL: https://4ort.xyz/entity/gram-staining · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 14w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    Topic's main category → Category:Gram stains
    Main wikidata property → P2597
    Named after → Hans Christian Gram
    Discoverer or inventor → Hans Christian Gram
    + 11 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.