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Related to malignant pustule: anthrax
dermatologic B. anthracis infection produces a characteristic lesion that begins as a papule and soon becomes a vesicle and breaks, discharging a bloody serum; the seat of this vesicle, in about 36 hours, becomes a bluish black necrotic mass; constitutional symptoms of septicemia are severe: high fever, vomiting, profuse sweating, and extreme prostration; the infection is often fatal.
Synonym(s): malignant pustule
malignant pustuleOne of the forms of ANTHRAX, occurring when the organism penetrates an abrasion in the skin. There is a boil-like LESION with a black dead centre surrounded by a hard inflamed swelling. This is the commonest manifestation of anthrax in humans and, although serious, usually responds to antibiotics.
tending to become progressively worse and to result in death; having the properties of anaplasia, invasiveness and metastasis; said of tumors.
see contagious ecthyma.
a form of anthrax in humans.
malignant catarrhal fever (MCF)
an acute highly infectious, fatal herpesvirus disease of cattle, farmed deer and occasionally pigs characterized by an erosive stomatitis and gastroenteritis, erosions on the mucosa of the upper respiratory tract, keratoconjunctivitis, encephalitis, and lymphadenopathy. There are at least two viruses involved. A wildebeest-associated form of the disease is caused by alcephaline herpesvirus 1. It occurs in most African countries in cattle which co-mingle with clinically normal wildebeest and hartebeest. It is epizootic and seasonal. It can also occur in zoological gardens in other countries. Sheep-associated MCF is caused by a poorly characterized virus, presumably ovine herpesvirus 2 (OvHV-2). Cases mostly occur when cattle have had contact with lambing ewes and usually start 1-2 months later. Goats can also act as a source of OvHV-2 infection for cattle. Cases without apparent or recent exposure to sheep do occur but are uncommon. Called also bovine malignant catarrh.
an acute infection of wounds by Clostridium septicum, C. chauvoei, C. perfringens, C. sordellii or C. novyi. The inflammation causes severe swelling and discoloration of skin and exposed tissues. There may be local subcutaneous emphysema and a frothy exudate, depending on the identity of the invading organism. There is a high fever and a profound toxemia; death follows within a few hours if treatment is not provided. Special occurrences are when a large number of animals are affected at one time. These include involvement of the vulva in recently lambed ewes, of shearing or docking wounds, and of the umbilicus or eyes of recently born lambs.
malignant fibrous histiocytoma
a rare aggressive tumor of dogs and cats; composed of densely packed fibroblasts and histiocytes.
malignant head catarrh
see malignant catarrhal fever.
see malignant histiocytosis.
see malignant hyperthermia, porcine stress syndrome.
see malignant carbuncle (above).
theileriasis caused by Theileria hirci.