qPCR microbiological contamination in milk testing presents unique interpretation challenges in dairy processing. Heat treatment, residual DNA, Ct values, and matrix effects can influence results. This article explains how dairy laboratories should evaluate detections in context before escalating decisions.

ELISA negative qPCR detected results are common in food laboratories due to differences in target detection, sensitivity, and matrix effects. Understanding whether DNA persistence, protein degradation, or analytical sensitivity is responsible is critical for structured and audit-defensible decision-making.