Laboratory Quality Assurance and Chain of Custody

This topic addresses two critical pillars of professional laboratory practice: internal quality assurance (QA) and the forensic chain of custody. For tertiary students in Zambia, especially those in forensic science and laboratory management programs, it covers systematic activities implemented within a lab to ensure the reliability and accuracy of test results, including the analysis of unusual positivity rates to detect contamination. The chain of custody is a legal document that chronologically traces the handling, transfer, and analysis of a physical sample, which is paramount in forensic science to maintain evidence integrity for court proceedings. Zambian university and college learners must understand that breaches in either area can invalidate results and have serious professional, legal, or clinical consequences. Mastery of QA principles and chain of custody procedures is essential for examinations and is a fundamental requirement for employment in accredited diagnostic laboratories, forensic labs, and any setting where data integrity is legally mandated, ensuring graduates uphold the highest standards of practice in Zambia.