negri body
Very LowTechnical / Medical / Veterinary
Definition
Meaning
An inclusion body found in the cytoplasm of nerve cells, particularly in the hippocampus and Purkinje cells of the cerebellum, characteristic of rabies infection.
A distinctive microscopic pathological structure used as a definitive diagnostic marker for rabies encephalitis in both animals and humans.
Linguistics
Semantic Notes
The term is exclusively used in pathology and neurology. It is a proper noun (capitalized) named after its discoverer, Adelchi Negri. It refers to a specific, morphologically defined object, not a general condition or symptom.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling conventions for the adjective 'Negri' remain the same. The term is used identically in scientific literature globally.
Connotations
Purely scientific and diagnostic. Carries connotations of a fatal disease (rabies).
Frequency
Equally rare and specialized in both varieties, confined to medical and veterinary contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The pathologist identified Negri bodies in the tissue sample.Negri bodies are present in the infected neurons.The diagnosis was confirmed by the detection of Negri bodies.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Not used.
Academic
Used in veterinary medicine, pathology, and neurology research papers and textbooks as a key diagnostic term for rabies.
Everyday
Never used in everyday conversation.
Technical
The primary context. Used in laboratory reports, diagnostic manuals, and clinical discussions among healthcare and veterinary professionals.
Examples
By Part of Speech
verb
British English
- The tissue sample was sectioned and stained to visualise any potential Negri bodies.
- One must carefully examine the Purkinje cells to Negri-body.
American English
- The lab will process the brain tissue to look for Negri bodies.
- The pathologist is examining the slides to rule out Negri-body formation.
adverb
British English
- The neurons were Negri-body-positive.
American English
- The stain reacted Negri-body-specifically.
adjective
British English
- The Negri-body-positive sample confirmed the rabies diagnosis.
- They observed a classic Negri-body morphology.
American English
- The report indicated a Negri-body-like structure, but confirmation is needed.
- A definitive diagnosis requires Negri-body identification.
Examples
By CEFR Level
- This term is not used at the A2 level.
- Doctors can find special signs of rabies in the brain.
- A key laboratory finding for rabies is the presence of distinctive structures called Negri bodies in nerve cells.
- The post-mortem diagnosis was conclusive after the histopathological examination revealed numerous eosinophilic Negri bodies within the hippocampal neurons.
Learning
Memory Aids
Mnemonic
Think: 'Negri' sounds like 'negative' outcome from a 'rabies' infection, and the bodies are found in nerve cells.
Conceptual Metaphor
PATHOLOGICAL STRUCTURES ARE SIGNATURES (The Negri body is the 'calling card' or 'signature' of the rabies virus left inside a cell).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'body' as 'тело' in the sense of a human/animal body. Here it means 'тельце' or 'включение'.
- The term is a direct loan translation in medical Russian: 'тельца Негри'. Using a descriptive translation like 'включения при бешенстве' is less precise.
- Avoid associating the name 'Negri' with any modern ethnic or racial connotations; it is solely an eponym.
Common Mistakes
- Mispronouncing 'Negri' as /ˈnɛɡri/ (with a short 'e') instead of /ˈneɪɡri/.
- Using lowercase ('negri body').
- Using it as a general term for any viral inclusion body.
- Confusing it with other intracellular inclusions like Lewy bodies or Mallory bodies.
Practice
Quiz
In which disease are Negri bodies a pathognomonic finding?
FAQ
Frequently Asked Questions
They were discovered by the Italian pathologist Adelchi Negri in 1903.
No, they are found in about 70-80% of human rabies cases. Their absence does not rule out rabies, and other diagnostic methods like PCR are often used.
They appear as round or oval, eosinophilic (pink-staining) cytoplasmic inclusions, often with a darker inner structure, ranging from 2 to 10 micrometres in size.
No. Their identification requires a brain tissue sample (usually post-mortem), specialized histological staining (e.g., Seller's stain, immunohistochemistry), and examination by a trained pathologist using a microscope.