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Blackleg (disease)
:''"Blackleg" is also a plant disease caused by ''Pectobacterium carotovorum'' (= ''Erwinia carotovora'').''
Blackleg, black quarter, quarter evil, or quarter ill ((ラテン語:gangraena emphysematosa)) is an infectious bacterial disease most commonly caused by ''Clostridium chauvoei'', a Gram-positive bacterial species. It is seen in livestock all over the world, usually affecting cattle, sheep, and goats. It has been seen occasionally in farmed bison and deer.〔Mackintosh C, Haigh JC, Griffin F. Bacterial diseases of farmed deer and bison. Rev Sci Tech. 2002 (2):249-63.〕 The acute nature of the disease makes successful treatment difficult, but an effective vaccine is available to provide animals with protective immunity.
==Susceptibility==
Most losses due to blackleg occur when the cattle are between the ages of six months and two years, although it can occur when they are as young as two months. Typically, cattle that have a high feed intake and are well-conditioned tend to be the most susceptible to blackleg. Furthermore, many blackleg cases occur during the hot and humid summer months or after a sudden cold period, but cases can occur at any time during the year.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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