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Within what time frame should the second step of the tuberculosis skin test be administered if the first test is negative?
1 to 3 weeks
2 to 4 weeks
2 to 7 days
5 to 10 days
The correct answer is: 2 to 4 weeks
The second step of the tuberculosis skin test, commonly known as the two-step Mantoux test, should be administered within a time frame of 2 to 4 weeks following the negative result of the first test. This approach is especially important for individuals who are being screened for tuberculosis, as it helps to identify those who may develop a delayed reaction to the tuberculin antigen. By conducting the second skin test within this time frame, healthcare professionals can ensure accurate diagnosis and improve the detection of latent TB infection, especially in populations at high risk. This practice is supported by guidelines from public health authorities and is crucial for effective screening and management of tuberculosis exposure. Understanding the appropriate interval for the second test is critical for nursing home administrators, as it reinforces the importance of adhering to public health protocols in order to maintain the health and safety of residents and staff.