blueocean
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Are you sure you didn't forget something because according to CDC these are criteria for positive PPD test:
5mm induration: Household or close contacts of an active case, persons with a clinical suspicion of TB, and patients with HIV infection.
> 10 mm of induration: This group includes patients with the following risk factors: foreign-born persons from high prevalence countries; those from medically underserved, low-income populations including high risk ethnic minorities; intravenous drug users; the homeless; residents of facilities for long term care (nursing homes, institutions for the developmentally disabled, and correctional insti tutions); and persons with medical conditions associated with a higher risk of TB.
> 15 mm induration: no risk patients
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| jamdoc
Forum Elite
Topics: 30
Posts: 244
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answer is C. nothing is mentioned in the question stem abt the h/o contact with a T.B patient or the risk factors so we assume that the above mentioned persons (except HIV pt.)are not a high risk pts.
according to CDC guidelines in HIV > 5 m.m but here its 4 m.m and if no risk factors mentioned it shld be >15 m.m none of the above optiones have > 15 m.m
last one if age is <35 yrs and induration >10 m.m then he shld receave INH prophylaxis.
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| jamdoc
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5 mm or more induration is a positive reaction
in the following instances:
1. Patients who have recently had close contact
with a person with an active case of tuberculosis
2. Patients with fibrotic lesions on chest
radiograph consistent with past healed
tuberculosis
3. Patients with known or suspected HIV infection
10 mm or more induration is a positive reaction
in the following instances:
1. Patients with certain high-risk health conditions
(Table 1)
2. Patients from other countries with a high
prevalence of tuberculosis
3. Medically underserved high-risk minorities
(blacks, Hispanics, Native Americans)
4. Injecting drug users
5. Residents of long-term care facilities
6. Other high-risk populations identified by local
health departments
15 mm or more induration is a positive reaction-All groups not mentioned above
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| jamdoc
Forum Elite
Topics: 30
Posts: 244
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Candidates for Isoniazid Chemoprophylaxis
Positive PPD, regardless of age:
1. Persons with HIV infection ([more than or equal to] 5 mm)
2. Persons with risk factors for HIV, but of
unknown status ([more than or equal to] 5 mm)
3. Close contacts of infectious cases ([more than or equal to]
5 mm),
including PPD-negative children ([more than or equal to] 5 mm)
of
newly diagnosed patients until a repeat PPD
at 12 weeks
4. Recent converters under 35 years of age with
[more than or equal to] 10 mm or induration
5. Recent converters over 35 years of age with
[more than or equal to] 15 mm of induration
7. Those with fibrotic changes on chest radiograph
indicating past healed tuberculosis ([more than or equal to]
5 mm)
8. Injecting drug users known to be HIV-seroneg-
ative with [more than or equal to] 10 mm of induration
9. Persons with high-risk medical conditions with
[more than or equal to] 10 mm (see Table 1)
Positive PPD, in those less than 35 years of age
with [more than or equal to] 10 mm of induration:
1. Patients from another country with a high
prevalence of disease
2. Medically underserved low-income populations
3. Residents in long-term care facilities
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| fox
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Thanks Jamdoc
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| girl^interrupted
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Thanks..Nice xplanation
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| GoodGirl
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Nice discussion, curious about where the jamdoc got those criteria? Are they still valid?
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