RVR Diagnostics

Down, but hardly out, at comeback-primed Chembio

By GREGORY ZELLER // Operating and net losses that more than tripled year-over-year tell only part of the story of Chembio Diagnostic Systems Inc.’s first quarter. That was the message Tuesday from John Sperzel III, chief executive of the point-of-care diagnostics specialist, who addressed investors in a conference call after the firm shared the results of the first quarter of its fiscal 2017, which ended March 31. It was another down quarter for the Medford-based…