vaccinia gangrenosa
Noun: A severe, potentially fatal complication of the smallpox vaccination (vaccinia), primarily occurring in individuals with a compromised immune system. The condition is characterized by the progressive, uncontrolled enlargement and tissue death (necrosis) of the skin lesion at the vaccination site.
This is a highly specific medical term. It is used in clinical, historical, and public health contexts to describe this rare adverse event. * The patient's immunological deficiency led to the development of vaccinia gangrenosa following vaccination. * Vaccinia gangrenosa was a documented, though rare, risk during the global smallpox eradication campaign.
The term is often discussed in contrast to milder vaccine reactions (like normal "take" or progressive vaccinia) and within the context of contraindications for live virus vaccines in immunocompromised hosts. * Historical medical reviews note that vaccinia gangrenosa underscored the critical importance of screening for immune disorders before administering the live vaccinia virus.
- Progressive vaccinia: A closely related term sometimes used interchangeably, though it may describe a broader category of non-healing vaccinia infections.
- Vaccinia necrosum: An alternative name for the same condition.
- Eczema vaccinatum: A different, severe complication where the vaccinia virus spreads in individuals with a history of eczema.
- Progressive vaccinia (in specific contexts)
- Vaccinia necrosum
This term refers exclusively to a pathological condition resulting from the smallpox vaccine. It is not a type of vaccine itself. The key defining features are its association with immunodeficiency and the hallmark symptom of a progressively enlarging, necrotic lesion.
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a severe or even fatal form of vaccinia that occurs mainly in persons with an immunological deficiency; characterized by progressive enlargement of the initial lesion
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