What assessment finding would indicate a positive PPD in an HIV patient?

In the context of HIV patients, a positive PPD (purified protein derivative) test is indicated by an induration of 5 mm or greater. This is because individuals with compromised immune systems, such as those with HIV, may not mount as robust an immune response as healthy individuals. Therefore, the threshold for determining a positive test result is lower for those at higher risk due to immunosuppression.

For the general population, a 10 mm induration is often used to define a positive test, but HIV patients require only 5 mm because their susceptibility to developing active tuberculosis (TB) is significantly higher. This adjustment helps ensure that those who may be at significant risk due to their HIV status receive timely medical intervention.

In summary, a 5 mm induration in an HIV patient indicates a positive PPD result, signaling the need for further evaluation and potential treatment for latent TB infection.