TB

Question 1

primary infection

Answer 1

=infection

• cavitation
• caseating granuloma

Question 2

secondary infection

Answer 2

=reactivation
-hemoptysis, night sweats, weight-loss

think tb or cancer -other causes of symptoms

Question 3

whats + ppd

Answer 3

induration not erythema
over 5mm:hiv/aids, chemo, anergy, transplant
(cant tolerate false - in these patients)

over 10 mm:healthcare providers, prison, homeless, travelers

over 15mm: no exposure

Question 4

alternative to ppd

Answer 4

ifn gamma assay

not responsive to BCG so use this if possible to eliminate false +

Question 5

positive PPD what to do

Answer 5

CXR then AFB

Question 6

negative PPD what to do

Answer 6

annual screen + 2 tier test if needed (eg starting healthcare job)

Question 7

negative CXR

Answer 7

after + PPD, indicates latent tb –>isoniazid+ b6

Question 8

+ CXR, -AFB

Answer 8

also latent tb –>isoniazid + b6

Question 9

+CXR +AFB

Answer 9

active tb –>RIPE

Question 10

-CXR -AFB

Answer 10

other cause

Question 11

-CXR +AFB

Answer 11

MAC

Question 12

pleural effusion/fluid analysis important marker in tb

Answer 12

ada -adenosine deaminase