Acute viral nasopharyngitis laboratory findings: Difference between revisions
Jump to navigation
Jump to search
Ahmed Younes (talk | contribs) No edit summary |
Ahmed Younes (talk | contribs) No edit summary |
||
| Line 2: | Line 2: | ||
{{Acute viral nasopharyngitis(common cold)}} | {{Acute viral nasopharyngitis(common cold)}} | ||
{{CMG}};{{AE}}{{AY}} | {{CMG}};{{AE}}{{AY}} | ||
==Overview== | |||
==laboratory findings== | |||
Common cold is a clinical diagnosis and lab tests are usually not needed unless identification of the specific RV strain is needed. | |||
===Viral culture=== | |||
*Specimens from nasal exudate can be cultured on embryonic lung cells or M-HLEA. | |||
*Results are revealed after 14 days, so empiric treatment should be started without waiting for the results. | |||
===PCR=== | |||
*PCR is a faster and more sensitive test than viral culture and direct antigen testing. | |||
*However, PCR is a very expensive diagnostic tool. So, its use should be limited to severly ill patients in whom identification of the offending organism is mandatory. | |||
===Other lab tests=== | |||
====CBC==== | |||
*CBC is non specific and of low value in common cold. | |||
*CBC may show leukocytosis. | |||
====ESR and CRP:==== | |||
*ESR and CRP may be elevated but this finding is highly non specific. | |||
==References== | ==References== | ||
Revision as of 16:15, 22 June 2017
|
Acute viral nasopharyngitis Microchapters |
|
Differentiating acute viral nasopharyngitis from other diseases |
|---|
|
Diagnosis |
|
Treatment |
|
Case Studies |
|
Acute viral nasopharyngitis laboratory findings On the Web |
|
American Roentgen Ray Society Images of Acute viral nasopharyngitis laboratory findings |
|
Risk calculators and risk factors for Acute viral nasopharyngitis laboratory findings |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Ahmed Younes M.B.B.CH [2]
Overview
laboratory findings
Common cold is a clinical diagnosis and lab tests are usually not needed unless identification of the specific RV strain is needed.
Viral culture
- Specimens from nasal exudate can be cultured on embryonic lung cells or M-HLEA.
- Results are revealed after 14 days, so empiric treatment should be started without waiting for the results.
PCR
- PCR is a faster and more sensitive test than viral culture and direct antigen testing.
- However, PCR is a very expensive diagnostic tool. So, its use should be limited to severly ill patients in whom identification of the offending organism is mandatory.
Other lab tests
CBC
- CBC is non specific and of low value in common cold.
- CBC may show leukocytosis.
ESR and CRP:
- ESR and CRP may be elevated but this finding is highly non specific.