U.S. doctors online nowAsk doctors free
A 39-year-old member asked:

is the skin test as accurate as a chest x-ray for tb?

4 doctor answers14 doctors weighed in
Dr. Rakhi Dimino
Specializes in Obstetrics and Gynecology
No: The skin test is a screening test to see if you might have been exposed to or contracted tb. If the skin test is positive, a chest x-ray is done to see if you have active tb.
Dr. Alfredo Garcia
Pediatrics 56 years experience
TB test: The skin test (tuberculin, ppd) is very accurate in detecting the presence of tuberculosis. A chest x-ray will show positive findings of tuberculosis only if there is active disease. A negative chest x-ray does not rule out tuberculosis but a positive tuberculin will, despite absence of symptoms.
Dr. Geoffrey Rutledge
Internal Medicine 41 years experience
Yes and no: The skin test almost always shows if you have been exposed to TB but does not mean you have active disease. The chest x-ray indicates if you have significant lung infection, but does not show early or very mild infections.
Dr. Pam Yoder
Dr. Pam Yoder commented
Specializes in Maternal-Fetal Medicine
Which tb test?
Jul 10, 2012
Dr. Geoffrey Rutledge
Internal Medicine 41 years experience
Provided original answer
The Mantoux test (PPD, purified protein derivative, tuberculin) is the most accurate and reproducible test. The Tine test also accurate, although some are concerned it is less reproducible.
Jul 10, 2012
Dr. Andrew Ho
Psychiatry 30 years experience
Common mistake BCG: Some people get bacille calmette guerin (bcg), which is a TB vaccine used worldwide (except U.S.) and can cause life-long false positive skin test. Ignorant public health agencies have been known to force TB treatment in such cases. For people who received bcg, TB blood testing is much more specific. You can read about this at the cdc website: http://www.Cdc.Gov/tb/topic/testing/default.Htm.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
$30 per visit with
membership

Similar questions

A 37-year-old member asked:

Will penicillin vk 500mg tablets treat an ear infection?

1 doctor answer2 doctors weighed in
Dr. Jay Park
Dr. Jay Parkanswered
Pediatrics 50 years experience
Unlikely: With a large proportion of s. Pneumonii (most common bacteria causing middle ear infection) becoming resistant to penicillin, the mainstay of antibiotics treatment for "ear infection" is currently a high dose of amoxicillin.
A 30-year-old member asked:

How can differentiate the chest pain from acute pericarditis than acute myocardial infarction?

1 doctor answer3 doctors weighed in
Dr. Gutti Rao
Hospital-based practice 46 years experience
Different: Acute pericarditis may present with fever chest pain. On exam we may find pericardial rub. Also ekg findings may differ between the two.
A member asked:

I have a bad knee I could not walk two weeks ago without a lot of pain my doctor sent me for a X-ray it didn't show anything?

1 doctor answer1 doctor weighed in
Dr. Ish Rawal
Internal Medicine 19 years experience
Cartilage: Xray doesn't show cartilage damage. If knee pain is persistent despite normal x-ray then MRI should be done to explore other possible cause.
A 18-year-old female asked:

I have the flu and am struggling to breath with bad chest pains and shooting pains down my left arm?

1 doctor answer1 doctor weighed in
Dr. Martin Raff
Infectious Disease 56 years experience
See a doctor: This no longer sounds like influenza. If flu to begin with this can predispose you to secondary acute bacterial pneumonia which can be potentially very severe and even fatal. Please go to an emergency room asap and be examined and treated. Do not wait. Hope you are better soon.
Homestead, FL
A 24-year-old female asked:

Around my aunt eye there is some swelling , some pain , itchy. The pain level is a 5 on a scale 1-10 . Should we be concerned ?

1 doctor answer1 doctor weighed in
Dr. Andrew Shatz
Ophthalmology 26 years experience
See an eye doctor: Swelling and pain around the eye may be caused by an infection. If left untreated, it can potentially get into the eye socket and even the brain. Your aunt should be evaluated by an eye doctor immediately.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
$30 per visit with
membership
Last updated Jun 6, 2018
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
$30 per visit with
membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.