A specific alphanumeric code identifies a batch of tuberculin purified protein derivative (PPD) used in cutaneous tuberculosis screening. This identifier is critical for tracking and managing the supply of the reagent. As an example, a vial may display “Lot Number: XYZ123,” uniquely designating that particular manufacturing run of PPD.
This identifier’s importance lies in ensuring quality control and traceability. If adverse reactions or inaccurate results are detected across multiple administrations, the corresponding code allows public health officials to quickly isolate the affected batch. This enables swift investigation of potential manufacturing defects or handling errors, safeguarding patient well-being and minimizing disruptions to screening programs. Historically, these identifiers have been instrumental in tracing sources of contamination or variations in potency, leading to improvements in the manufacturing and distribution of PPD.