Histoplasmosis laboratory findings: Difference between revisions

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{{Histoplasmosis}}
{{Histoplasmosis}}


{{CMG}} {{AE}} {{SSK}}
{{CMG}} {{AE}} {{SSK}}, {{AKI}}


==Overview==
==Overview==
There are no specific laboratory findings associated with acute [[Histoplasma capsulatum|histoplasma]] infection. Diagnosis is confirmed by the demonstration of the [[yeast]] cells from tissue samples or body fluids, culture and [[Antigen detection test|antigen detection]].


==Laboratory Findings==
==Laboratory Findings==
Laboratory findings suggestive of disseminated histoplasma infection include the following:
There are no specific laboratory findings associated with acute [[Histoplasma capsulatum|histoplasma]] infection. Diagnosis is confirmed by the demonstration of the [[yeast]] cells from tissue samples or body fluids, culture and antigen detection.<ref name="pmid28327821">{{cite journal| author=Maltos AL, Maia E, Oliveira CD| title=Disseminated histoplasmosis diagnosed in a peripheral blood smear. | journal=Rev Soc Bras Med Trop | year= 2017 | volume= 50 | issue= 1 | pages= 148 | pmid=28327821 | doi=10.1590/0037-8682-0189-2016 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=28327821  }} </ref><ref name="pmid26398539">{{cite journal| author=Hage CA, Azar MM, Bahr N, Loyd J, Wheat LJ| title=Histoplasmosis: Up-to-Date Evidence-Based Approach to Diagnosis and Management. | journal=Semin Respir Crit Care Med | year= 2015 | volume= 36 | issue= 5 | pages= 729-45 | pmid=26398539 | doi=10.1055/s-0035-1562899 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=26398539  }} </ref>
*Anemia
*The following laboratory findings can be present in patient with a [[Disseminated disease|disseminated]] [[Histoplasmosis|histoplasma]] infection:
*Leukopenia
**[[Anemia]]
*Thrombocytopenia
**[[Leukopenia]]
*Elevated liver enzymes
**[[Thrombocytopenia]]
*Elevated bilirubin
**Elevated [[Liver function tests|liver enzymes]]
*Elevated lactate dehydrogenase
**Elevated [[bilirubin]]
*Elevated ferritin
**Elevated [[lactate dehydrogenase]]
 
**Elevated [[ferritin]]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
*Histoplasma antigen detection in urine and/or serum is the most widely used and most sensitive method for diagnosing acute histoplasmosis.
 
Other methods include antibody tests, culture, and microscopy.
*'''Antigen detection:''' Enzyme immunoassay (EIA) is typically performed on urine and/or serum, but can also be used on cerebrospinal fluid or bronchoalveolar lavage fluid. Sensitivity is generally higher in urine than in serum, particularly for HIV-infected persons with disseminated histoplasmosis.
*'''Antibody tests:''' Because development of antibodies to Histoplasma can take two to six weeks, antibody tests are not as useful as antigen detection tests in diagnosing acute histoplasmosis or in immunosuppressed persons, who may not mount a strong immune response.
**'''Immunodiffusion (ID):''' Tests for the presence of H (indicates chronic or severe acute infection) and M (develops within weeks of acute infection and can persist for months to years after the infection has resolved) precipitin bands; ~80% sensitivity.
**'''Complement Fixation (CF):''' Complement-fixing antibodies may take up to 6 weeks to appear after infection. CF is more sensitive but less specific than immunodiffusion.
*'''Culture:''' can be performed on tissue and body fluids, but may take up to 6 weeks to become positive; most useful in the diagnosis of the severe forms of histoplasmosis.
*'''Microscopy:''' for detection of budding yeast in tissue or respiratory secretions; low sensitivity.
*'''Polymerase Chain Reaction (PCR):''' PCR for detection of Histoplasma directly from clinical specimens is still experimental, but promising.<ref name=cdc2>Information for Healthcare Professionals about Histoplasmosis. Centers for Disease Control and Prevention. 2015. Available at: http://www.cdc.gov/fungal/diseases/histoplasmosis/health-professionals.html. Accessed February 2, 2016.</ref>


==References==
==References==
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[[Category:Fungal diseases]]
[[Category:Fungal diseases]]
[[Category:Rat carried diseases]]
[[Category:Rat carried diseases]]
[[Category:Emergency mdicine]]
[[Category:Disease]]
[[Category:Up-To-Date]]
[[Category:Infectious disease]]
[[Category:Pulmonology]]
[[Category:Gastroenterology]]

Latest revision as of 22:11, 29 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Serge Korjian M.D., Aravind Kuchkuntla, M.B.B.S[2]

Overview

There are no specific laboratory findings associated with acute histoplasma infection. Diagnosis is confirmed by the demonstration of the yeast cells from tissue samples or body fluids, culture and antigen detection.

Laboratory Findings

There are no specific laboratory findings associated with acute histoplasma infection. Diagnosis is confirmed by the demonstration of the yeast cells from tissue samples or body fluids, culture and antigen detection.[1][2]

References

  1. Maltos AL, Maia E, Oliveira CD (2017). "Disseminated histoplasmosis diagnosed in a peripheral blood smear". Rev Soc Bras Med Trop. 50 (1): 148. doi:10.1590/0037-8682-0189-2016. PMID 28327821.
  2. Hage CA, Azar MM, Bahr N, Loyd J, Wheat LJ (2015). "Histoplasmosis: Up-to-Date Evidence-Based Approach to Diagnosis and Management". Semin Respir Crit Care Med. 36 (5): 729–45. doi:10.1055/s-0035-1562899. PMID 26398539.