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Infectious Disease Screening Flashcards

6 cards from real USCIS DOCTORS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Infectious Disease Screening flashcards as text
  1. Which tuberculosis test is considered an acceptable alternative to the tuberculin skin test (TST) in immigration medical exams?

    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.

  2. For which population is a chest X-ray required as part of the tuberculosis evaluation during immigration exams?

    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.

  3. What is the required syphilis test used in immigration medical exams?

    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.

  4. At what age does gonorrhea testing become required during immigration medical exams?

    Answer: 15 years and older

    Gonorrhea testing is required for all applicants aged 15 and older as part of the mandatory communicable disease screening.

  5. A tuberculin skin test (TST) reading of how many millimeters of induration is considered positive for an immunocompromised applicant?

    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.

  6. Which disease classification applies to an applicant found to have active, infectious tuberculosis?

    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.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. uscis.gov — Test delivery, eligibility · verified Oct 2026
  2. ecfr.gov — Fees · verified Oct 2026