Two local diagnostics firms, one of which is working in the increasingly competitive field of cancer testing, closed acquisition deals this week worth around $500 million. 

Billerica-based Quanterix Corp. (Nasdaq: QTRX) announced this week it will buy Swedish firm UmanDiagnostics AB for $22.5 million. 

By purchasing Uman, Quanterix will get access to a cache of antibodies that can detect an element called neurofilament light. Quanterix’s commercial diagnostic tool looks for small amounts of…

Boston Biz Journal