Geographical Distribution
Chrysomya bezziana is widely distributed throughout tropical areas in the Old World. It is most prevalent in Southeast Asia, tropical and subtropical Africa, some countries in the Middle East, India, the Malay Peninsula, the Indonesian and Philippine Islands, and Papua New Guinea. C. bezziana is not found at altitudes higher than 2500 meters above sea level.
In countries where Chrysomya bezziana does not exist, scientists and those in agriculture are worried that commercial flights, boats, or vehicles will distribute the fly. The climates C. bezziana thrives in are present in Australia and the Americas; the fly requires climates similar to its New World relative Cochliomyia hominivorax. Spread of the pest from Papua New Guinea to Australia has become a concern for Australia, as the presence of C. bezziana could cost livestock industries up to $500 million a year, making it a major quarantine threat.
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