Legionellosis Q

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Legionellosis Q

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arlete
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08/07/08 - 09:53 AM

What is the most sensitive and specific test for Legionella pneumonia?

A. Culture of sputum

B. Immunofluorescent microscopy of sputum

C. DNA probe of sputum

D. Urine radioimmunoassay (RIA)

E. Antibody detection in serum

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amnesia
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08/07/08 - 09:59 AM

D. Urine radioimmunoassay (RIA)

docdoc9
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08/07/08 - 10:03 AM

D.urine radioimmunoassay

Gotan
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08/07/08 - 11:24 AM

D!!!!!!!

I remember Conrad Fischer pretending to pee on the IM videos.
Man he is too funny!!!!!!

amnesia
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08/07/08 - 11:52 AM

i checked CMDT...it says culture is the most sensitive test confused

Edited by amnesia on 08/07/08 - 02:27 PM

arlete
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08/07/08 - 01:26 PM

Yeap.

It's A.

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amnesia
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08/07/08 - 02:27 PM

i guess i will make this mistake forever and ever ...i like the urine antigen test nod

i guess that if urine antigen test is present in any q >>>i will blindly pick it. grin

thanks arlete

NB>>treatment of legionella is erythromycin<<

zen08
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08/07/08 - 02:42 PM

The answer is sputum culture nod

It's the definitive test.
Amnesia, I think that the urine antigen test is the best initial test...

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ngaybinhyen
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08/07/08 - 02:45 PM

Inspiring question
Please find attached

-t

Attached Files:
TABLE 335 Leigionella - Goldman Cecil Medicine.docx (13 KB, 22 downloads)

Eagle_303
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08/07/08 - 03:08 PM

#10

Most sensitive test is = Urine antigen test only 2-3 hrs required
Most specific test = culture of specimen 3-5 days required for growth
No doubt on long term basis culture is the most sensitive also but as far as time factor is concerned the urine antigen is the "most sensitive' test for Dx/Rx point of view

Edited by Eagle_303 on 08/07/08 - 03:16 PM

arlete
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08/07/08 - 03:14 PM

#11

Watch the file above, Eagle... wink

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arlete
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08/07/08 - 03:15 PM

#12

I agree, urine antigen test is the best initial test.

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Eagle_303
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08/07/08 - 03:18 PM

#13

How can we open that file ?

arlete
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08/07/08 - 03:44 PM

#14

Eagle: There's no such a thing: "most sensitive' test for Dx/Rx point of view"". The most sensitive test is the one with the greater number of true positives among all the sick people tested. That's the answer that will be right during the USMLE. The culture is the gold standard to which all the other tests are compared, in this case.

Now, pneumococcal pneumonia is another story, since it is part of the normal human flora.

I don't know about the file, I just clicked on it...

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amnesia
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08/07/08 - 04:01 PM

#15

Eagle_303 wrote:
How can we open that file ?

use word

WaqasQureshi
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08/07/08 - 04:43 PM

#16

CULTURE.
HIGHEST YIELD ... CHARCOAL YEAST AGAR. RARELY DONE IN PRACTICE

arlete
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08/07/08 - 06:12 PM

#17

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Gotan
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08/07/08 - 07:00 PM

#18

Thanks arlete!!!

Eagle_303
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08/07/08 - 07:14 PM

#19

arlete wrote:
Eagle: There's no such a thing: "most sensitive' test for Dx/Rx point of view"". The most sensitive test is the one with the greater number of true positives among all the sick people tested. That's the answer that will be right during the USMLE. The culture is the gold standard to which all the other tests are compared, in this case.

Now, pneumococcal pneumonia is another story, since it is part of the normal human flora.

I don't know about the file, I just clicked on it...

A patient comes with pneumonia ,you cannot wait for culture report to make the diagnosis and treat the patient (3-5 days) .You will not treat "dead body"

ngaybinhyen
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08/07/08 - 08:53 PM

#20

Please consider every single factor separately.

They ask us the Sensitivity and Specificity of a diagnostic test, we just pay our attention on those parameters regardless the time it take to have results.

-t.

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