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  • Title: Type E botulism.
    Author: Horowitz BZ.
    Journal: Clin Toxicol (Phila); 2010 Nov; 48(9):880-95. PubMed ID: 21171846.
    Abstract:
    There are seven known serotypes of botulism, designated A through G; almost all human cases of botulism are caused by types A, B, and E. Botulism type E is the predominant serotype causing disease associated with native Arctic foods. In the circumpolar regions of the world, the coastal soils are rich in botulism type E, and consumption of fish and marine animals in these areas are the sources of clusters of botulism. Unlike spores of type A and B, botulism type E can withstand freezing down to 3.5°C. Alaskan native fermentation of fish heads, fish eggs, and beaver tail allow proper anaerobic conditions for botulinum toxin to be elaborated from Clostridium botulinum. The consumption of whale meat, "muktuk" has also been associated with outbreaks of botulism in Alaska and the Canadian Arctic. Elsewhere in the Arctic regions, type E botulism has been associated with Norwegian "rakfisk" prepared by a process similar to fermented Alaskan foods. Outbreaks in Egypt with the salted gray mullet "faseikh", in Israel and New York linked to salted uneviscerated whitefish "kapchunka", in Iran from eating "ashbal" an uncooked salmon, and in Japan with "izushi" a traditional fermented fish preserved in rice have occurred. Importation of vacuum-packed whitefish from Alaska and Canada has also been associated with sporadic cases of botulism type E in Europe. In March 2010, the Center for Disease Control and Prevention released the heptavalent antitoxin (H-BAT) for use in the USA, under an Investigational New Drug program, as the preferred treatment for food-borne botulism, including type E, which had not been covered by the bivalent antitoxin, the prior approved antitoxin product in the USA.
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