Final answer:
The PCT should label the stool specimen and send it to the laboratory promptly after obtaining it for parasitic analysis.
Step-by-step explanation:
After obtaining the stool specimen for parasites, the PCT should label the specimen and send it to the laboratory promptly. This is because stool samples need to be processed promptly for analysis using serological or molecular techniques. This is important in order to accurately identify the presence of parasites or other microorganisms in the specimen. To ensure proper handling and analysis, it is best to send the specimen to the laboratory as soon as possible.