VANCOUVER, British Columbia, Aug. 4, 2011 (GLOBE NEWSWIRE) -- Tekmira Pharmaceuticals Corporation (Nasdaq:TKMR) (TSX:TKM), a leading developer of RNA interference (RNAi) therapeutics, announced that it will hold a conference call and webcast on Thursday, August 11, 2011 at 9:00 am Pacific Time (12:00 pm Eastern Time) to discuss its second quarter operating results and a summary of corporate highlights.