vaccinia gangrenosa


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Noun1.vaccinia gangrenosa - 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
vaccina, vaccinia, variola vaccina, variola vaccine, variola vaccinia - a local infection induced in humans by inoculation with the virus causing cowpox in order to confer resistance to smallpox; normally lasts three weeks and leaves a pitted scar