Tuberculosis Flashcards
1
Q
What is the mm of induration which indicates a positive test?
A
>5mm is positive for: HIV PTs Recent contact w/ TB PT Fibrotic changes on CXR Immunosuppresed PTs (I.e. on prednisone) PTs with organ transplants
>10mm positive for Recent immigrants <5yrs IVDA Children <4 y.o. Residents/employees in high risk settings Mycobacteriologic personnel
> 15mm positive for
Person without known risk factors
2
Q
What are some possible reasons for false negatives on Skin tests?
A
HIV
Steroid use
Anergy
Malnutrition
3
Q
What is the most specific and sensitive TB test?
A
Quantiferon gold
4
Q
Which drug can cause peripheral neuropathy?
A
Isoniazid (INH)
5
Q
If someone receives the BCG vaccine; it can cause positive results on which tests?
A
Skin test (PPD) Mantoux Test BUT NOT THE QUANTIFERON GOLD
6
Q
If someone receives the BCG vaccine; it can cause positive results on which tests?
A
Skin test (PPD) Mantoux Test BUT NOT QUANTIFERON GOLD
7
Q
What are the four first line drugs for Tb?
A
Isoniazid (INH)
Rifampin (RIF)
Ethambutol
Pyrazinamide
Drugs taken for 6 to 9 months