For which type of patients can TB skin tests typically be performed in-house?

TB skin tests, also known as Mantoux tests, are commonly performed in-house for multiple patient groups, as they are a standard procedure in many healthcare settings such as clinics and hospitals. The test involves a subcutaneous injection of a purified protein derivative (PPD) and requires careful reading of the results after 48 to 72 hours.

This procedure is generally straightforward and does not require complex laboratory testing or specialized equipment, enabling it to be administered in a variety of healthcare environments. As a result, it can be performed on all patients who need to be tested for tuberculosis exposure or infection, provided they meet any specific health criteria.

Other options might imply limitations based on urgency, physician judgment, or the necessity to send tests to specialized labs, which are not reflective of the capacity of typical healthcare facilities to conduct these tests. Thus, the understanding of TB skin tests as a routine in-house procedure supports the assertion that they can be performed for all patients when needed.