Results: Two samples, one obtained from a Thai and the other a Myanmese, were positive for P. knowlesi only.
Nucleotide sequences of the csp gene derived from these two patients were identical and phylogenetically
indistinguishable from other P. knowlesi sequences derived from monkeys and humans. Both patients worked in
Koh Song, located in the Kawthoung district of Myanmar, which borders Thailand.