Which specimen type requires a special handling technique to prevent contamination?

Special handling techniques are essential for all types of specimens to prevent contamination, ensuring the integrity of the sample and the accuracy of the test results. Blood specimens, for instance, require careful aseptic techniques to avoid introducing bacteria or other contaminants into the sample, which could lead to inaccurate results.

Urine specimens must be collected cleanly, often using a midstream collection method to prevent contamination from external sources or bacteria present in the urethra.

Stool specimens also require specific handling to avoid contamination from the environment or other organisms. Often, they are collected in a clean, dry container, and if testing for parasites or certain pathogens, they may need to be preserved with specific solutions to maintain viability.

Given that each type of specimen has unique requirements to prevent contamination, it is accurate that all of these specimen types require special handling techniques. Thus, the selection that suggests all require such measures recognizes the crucial importance of following proper protocols for each specimen type to ensure accurate laboratory results.