Final answer:
The incorrect skin test option among the choices is BNP, which is a blood test used to evaluate heart function, whereas PPD, Histo, and cocci are skin tests used for diagnosing infections such as tuberculosis, histoplasmosis, and coccidioidomycosis.
Step-by-step explanation:
The question pertains to different types of skin tests that are used for diagnosing various infections. Among the choices given, the only option that is not a skin test is BNP, which stands for B-type Natriuretic Peptide. This is a blood test that measures the concentration of BNP in the bloodstream to assess heart function, particularly in cases of heart failure. The other options, PPD (Purified Protein Derivative), Histo (Histoplasmin skin test), and cocci (Coccidioides skin test) are indeed skin tests used to test for tuberculosis, histoplasmosis, and coccidioidomycosis respectively.
Concerning the side questions: Other infections that can be diagnosed using a skin test similar to the tuberculin test are certain fungal infections and delayed-type hypersensitivity reactions. Screening for skin cancer is often done through a visual examination by a healthcare professional. Meanwhile, tests such as EIA, RT-PCR, and PCR can be used to detect the presence of specific viruses.