What population is immediately considered for further assessment if a PPD test measures at 15 mm or more?

A PPD test, or purified protein derivative test, is a screening tool used to determine if a person has been exposed to the bacteria that cause tuberculosis (TB). The measurement of 15 mm or more is of particular significance in the context of TB screening because it indicates a positive reaction that warrants further evaluation.

Considering the context of this question, a positive PPD test at 15 mm or more suggests that the individual may have been exposed to TB and requires further assessment to confirm if they have an active infection or latent TB.

In this scenario, individuals who present with a chest X-ray suggestive of TB are at a higher level of concern. A suggestive chest X-ray could indicate active TB disease, and thus, these individuals require immediate follow-up and assessment to confirm diagnosis and initiate treatment if necessary. This is crucial because untreated active TB can be contagious and poses a significant public health risk.

The other populations listed in the possible answers do not have the same immediate urgency based on the criteria of the PPD test measurement. While individuals with a high prevalence for TB or healthcare workers may also need monitoring or assessment, they are not automatically prioritized for further assessment purely based on the PPD result alone without additional clinical indicators. Digital nomads aged