Sharon Klugewicz

International intrigue at Medford’s Chembio

By GREGORY ZELLER // With declining Latin American sales contributing to a revenues losing streak, Chembio Diagnostics has shaken up its international rotation. The Medford-based biotech, which manufactures rapid point-of-care tests for HIV and syphilis, has had its ups and downs, and the latter have largely occurred south of the border. Reporting in March on the 2015 fiscal year, CEO John Sperzel pinned steep revenue and sales drops on a product glut in Mexico and…