USCIS Doctors Infectious Disease Screening 1 — Questions and Answers
Question 1: Which tuberculosis test is considered an acceptable alternative to the tuberculin skin test (TST) in immigration medical exams?
- Interferon-Gamma Release Assay (IGRA) (Correct answer)
- Chest X-ray alone
- Sputum culture
- QuantiFERON-TB skin patch
Correct answer: Interferon-Gamma Release Assay (IGRA)
IGRA (such as QuantiFERON-TB Gold or T-SPOT.TB) is an acceptable blood-based alternative to the TST for detecting latent TB infection.
Question 2: For which population is a chest X-ray required as part of the tuberculosis evaluation during immigration exams?
- Applicants aged 15 and older with a positive TST or IGRA (Correct answer)
- All applicants regardless of age or TST results
- Only applicants born in high-TB-burden countries
- Only applicants with respiratory symptoms
Correct answer: Applicants aged 15 and older with a positive TST or IGRA
A chest X-ray is required for applicants aged 15 and older who have a positive TST or IGRA result to evaluate for pulmonary tuberculosis disease.
Question 3: What is the required syphilis test used in immigration medical exams?
- A nontreponemal test (RPR or VDRL) followed by a treponemal confirmatory test if reactive (Correct answer)
- Only a treponemal-specific test (FTA-ABS)
- ELISA for syphilis antibodies
- Darkfield microscopy
Correct answer: A nontreponemal test (RPR or VDRL) followed by a treponemal confirmatory test if reactive
Syphilis screening uses a nontreponemal test (RPR or VDRL), and any reactive result must be confirmed with a treponemal test.
Question 4: At what age does gonorrhea testing become required during immigration medical exams?
- 15 years and older (Correct answer)
- 18 years and older
- 21 years and older
- All ages
Correct answer: 15 years and older
Gonorrhea testing is required for all applicants aged 15 and older as part of the mandatory communicable disease screening.
Question 5: A tuberculin skin test (TST) reading of how many millimeters of induration is considered positive for an immunocompromised applicant?
- 5 mm or more (Correct answer)
- 10 mm or more
- 15 mm or more
- Any visible induration
Correct answer: 5 mm or more
For immunocompromised individuals, including those with HIV, a TST induration of 5 mm or more is classified as a positive result.
Question 6: Which disease classification applies to an applicant found to have active, infectious tuberculosis?
- Class A – Communicable Disease of Public Health Significance (Correct answer)
- Class B1 – TB, Pulmonary, Active, Not Suspected Infectious
- Class B2 – TB, Extrapulmonary
- Class C – TB, No Current Disease
Correct answer: Class A – Communicable Disease of Public Health Significance
Active, infectious TB is classified as a Class A communicable disease of public health significance, rendering the applicant inadmissible.
USCIS Doctors Infectious Disease Screening 1
Which tuberculosis test is considered an acceptable alternative to the tuberculin skin test (TST) in immigration medical exams?