In which situation is serum collection and storage valuable?

Serum collection and storage are particularly valuable when there is a risk of infection that can be detected serologically in employees. This situation underscores the importance of monitoring and assessing potential exposures to infectious agents in laboratory settings, ensuring employee safety and health.

Collecting serum samples enables laboratories to screen for the presence of antibodies or antigens associated with specific pathogens, providing valuable information for workers at risk. Early detection of serological markers can lead to timely interventions, appropriate medical care, and effective workplace safety measures.

In contrast, while there may be specific situations listed related to surgery, care for genetically altered animals, or janitorial duties, these scenarios do not typically prioritize or necessitate the routine collection and storage of serum for monitoring infectious disease exposure in employees as significantly as option B.