** Shares of Genetic Signatures GSS.AX rise as much as 58.3% to A$0.38, their highest level since July 23 and on track for best day ever

** Specialist molecular diagnostics co reports quarterly sales of A$5.4 million ($3.51 million), up 15% pcp

** About 866,000 shares change hands, 5.7 times the 30-day avg

** Stock down 39.7% YTD, including the session's moves

($1 = 1.5389 Australian dollars)

(Reporting by Anjali Singh in Bengaluru)

((anjali.singh2@thomsonreuters.com;))