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A panzootic (from Greek παν ''pan'' all + ζόιον ''zoion'' animal) is an epizootic (an outbreak of an infectious disease of animals) that spreads across a large region (for example a continent), or even worldwide. The equivalent in human populations is called a pandemic. A panzootic can start when three conditions have been met: * the emergence of a disease new to the population. * the agent infects a species and causes serious illness. * the agent spreads easily and sustainably among animals. A disease or condition is not a panzootic merely because it is widespread or kills a large number of animals; it must also be infectious. For example cancer is responsible for a large number of deaths but is not considered a panzootic because the disease is, generally speaking, not infectious. Unlike an epizootic, a panzootic covers all or nearly all species over a large surface area (ex. rabies, anthrax). Typically an enzootic or an epizootic, or their cause, may act as a potential preparatory factor . == Causes of Spread and Environmental Influences == Contagion and infection by far play the biggest role in the dissemination and spread of epizootic and panzootic diseases. These include virulent (ex. Cattle Plague), septic (can be caused in the change in food quality), parasitic (ex. Scabies), and miasmatic infections (ex. Typhoid Fever). Many claim that an accidental morbific cause, which infects a great amount of animals which ceases activity after a prolonged time period.〔 Certain factors come into play in the spread of certain panzootic diseases, as can be seen with Batrachochytrium dendrobatidis. This infection seems to be sensitive to external conditions, particularly the environments temperature and moisture. These factors leads to limitations on where the diseases can thrive, acting almost as its ‘climate niche’. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「panzootic」の詳細全文を読む スポンサード リンク
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