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BANGKOK, May 16 (Reuters) - Some cholera has been confirmed among survivors of Cyclone Nargis, but the number was in line with case levels in previous years in Myanmar, the World Health Organization (WHO) said on Friday.

"We do have some confirmed cholera," Maureen Birmingham, acting WHO representative in Thailand, said of the hardest-hit Irrawaddy delta where cholera is endemic.

"We don't have an explosion of cholera. Thus far the rate of cholera is no greater than the background rate that we would be seeing in Myanmar during this season," she told reporters. (Reporting by Ed Cropley; Writing by Darren Schuettler; Editing by Jerry Norton)

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