Question

question 7 (5 points)
what is the standard test used in medical settings to screen for hiv infection?
a) a microscopic examination of cervical cells
b) a blood test that determines if antibodies are present
c) a laboratory culture of infected cells
d) a sample taken from the mouth to test oral fluid

Explanation:

🆕 New Concept Discovered: Medical Screening and Diagnostic Testing
Detecting pathogens by identifying the body's immune response.

Step 1: Analyze the purpose of HIV screening

Screening tests are designed to be highly sensitive, cost-effective, and reliable for detecting the presence of an infection in a population. For HIV, the primary and most common initial screening method in standard medical settings relies on detecting specific antibodies that the body's immune system produces in response to the virus, or a combination of antibodies and HIV antigens (such as the p24 antigen).

Step 2: Evaluate the given options

• a) a microscopic examination of cervical cells: This describes a Pap smear, which is used to screen for cervical cancer or human papillomavirus (HPV) changes, not HIV.
• b) a blood test that determines if antibodies are present: This describes an antibody test (such as an ELISA/EIA test), which is the standard, widely used screening method for HIV in clinical settings.
• c) a laboratory culture of infected cells: Viral cultures are complex, expensive, and slow. They are used in specialized research settings rather than standard clinical screening.
• d) a sample taken from the mouth to test oral fluid: While rapid oral fluid tests exist (like OraQuick), they are typically used for at-home testing or rapid point-of-care screening, but a blood-based antibody/antigen test remains the standard, definitive laboratory screening method in formal medical settings.

Answer:

b) a blood test that determines if antibodies are present