I do not know what people in Burma do. But in Thailand, Theravadin buddhist do not use knife or alike in religious ritual. Although some knives were blessed by medic shaman or Sangha (monk), they are mainly used as a talisman to protect ones from evil. Some shaman use the a blessed knife in non-religious ceremonies such as cut off a string of newly constructed temple marks (Bhramin/Buddhist mixed ceremonies). The blessed knives mostly are drop-point, similar to Meed Morh in this thread
http://www.vikingsword.com/vb/showthread.php?t=2451
The knife in the picture above could be a Burmese dressing knife, worn in social ceremonies.