Leprosy other diagnostic studies: Difference between revisions

Jump to navigation Jump to search
Line 10: Line 10:
===Smear test===
===Smear test===
May be obtained from any [[skin lesion]], [[nasal mucosa]] and/or [[ear lobe]].  
May be obtained from any [[skin lesion]], [[nasal mucosa]] and/or [[ear lobe]].  
This test has [[sensitivity]] of 50% and [[specificity]] of 100%. After collection of the [[Laboratory specimen|specimen]], to visualize the [[bacteria]], the ''Ziehl-Neelsen'' stain should be used. Developing countries with low resources and innovative techniques should base the [[diagnosis]] on clinical [[signs]], and results from the smear test.<ref name="EichelmannGonzález González2013">{{cite journal|last1=Eichelmann|first1=K.|last2=González González|first2=S.E.|last3=Salas-Alanis|first3=J.C.|last4=Ocampo-Candiani|first4=J.|title=Leprosy. An Update: Definition, Pathogenesis, Classification, Diagnosis, and Treatment|journal=Actas Dermo-Sifiliográficas (English Edition)|volume=104|issue=7|year=2013|pages=554–563|issn=15782190|doi=10.1016/j.adengl.2012.03.028}}</ref><ref name="pmid7570870">{{cite journal| author=Hatta M, van Beers SM, Madjid B, Djumadi A, de Wit MY, Klatser PR| title=Distribution and persistence of Mycobacterium leprae nasal carriage among a population in which leprosy is endemic in Indonesia. | journal=Trans R Soc Trop Med Hyg | year= 1995 | volume= 89 | issue= 4 | pages= 381-5 | pmid=7570870 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=7570870  }} </ref><ref name="pmid20966523">{{cite journal| author=Aggarwal A, Pandey A| title=Inverse sampling to study disease burden of leprosy. | journal=Indian J Med Res | year= 2010 | volume= 132 | issue=  | pages= 438-41 | pmid=20966523 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=20966523  }} </ref><ref name="pmid9503866">{{cite journal| author=Ramaprasad P, Fernando A, Madhale S, Rao JR, Edward VK, Samson PD et al.| title=Transmission and protection in leprosy: indications of the role of mucosal immunity. | journal=Lepr Rev | year= 1997 | volume= 68 | issue= 4 | pages= 301-15 | pmid=9503866 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9503866  }} </ref>
This test has [[sensitivity]] of 50% and [[specificity]] of 100%. After collection of the [[Laboratory specimen|specimen]], to visualize the [[bacteria]], the ''Ziehl-Neelsen'' stain should be used. Developing countries with low resources and innovative techniques should base the [[diagnosis]] on clinical [[signs]], and results from the smear test.<ref name="EichelmannGonzález González2013">{{cite journal|last1=Eichelmann|first1=K.|last2=González González|first2=S.E.|last3=Salas-Alanis|first3=J.C.|last4=Ocampo-Candiani|first4=J.|title=Leprosy. An Update: Definition, Pathogenesis, Classification, Diagnosis, and Treatment|journal=Actas Dermo-Sifiliográficas (English Edition)|volume=104|issue=7|year=2013|pages=554–563|issn=15782190|doi=10.1016/j.adengl.2012.03.028}}</ref><ref name="pmid7570870">{{cite journal| author=Hatta M, van Beers SM, Madjid B, Djumadi A, de Wit MY, Klatser PR| title=Distribution and persistence of Mycobacterium leprae nasal carriage among a population in which leprosy is endemic in Indonesia. | journal=Trans R Soc Trop Med Hyg | year= 1995 | volume= 89 | issue= 4 | pages= 381-5 | pmid=7570870 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=7570870  }} </ref><ref name="pmid20966523">{{cite journal| author=Aggarwal A, Pandey A| title=Inverse sampling to study disease burden of leprosy. | journal=Indian J Med Res | year= 2010 | volume= 132 | issue=  | pages= 438-41 | pmid=20966523 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=20966523  }} </ref><ref name="pmid9503866">{{cite journal| author=Ramaprasad P, Fernando A, Madhale S, Rao JR, Edward VK, Samson PD et al.| title=Transmission and protection in leprosy: indications of the role of mucosal immunity. | journal=Lepr Rev | year= 1997 | volume= 68 | issue= 4 | pages= 301-15 | pmid=9503866 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9503866  }} </ref>



Revision as of 19:54, 8 July 2014

Leprosy Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Leprosy from other Diseases

Epidemiology and Demographics

Risk Factors

Natural History, Complications and Prognosis

Diagnosis

Diagnostic Criteria

History and Symptoms

Physical Examination

Laboratory Findings

X Ray

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

Tertiary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

Leprosy other diagnostic studies On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Leprosy other diagnostic studies

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Leprosy other diagnostic studies

CDC on Leprosy other diagnostic studies

Leprosy other diagnostic studies in the news

Blogs on Leprosy other diagnostic studies

Directions to Hospitals Treating Leprosy

Risk calculators and risk factors for Leprosy other diagnostic studies

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]

Overview

Biopsy of skin lesions and skin smear tests are important for the diagnosis of leprosy in patients whose clinical examination is suspicious of the disease.

Other Diagnostic Studies

Smear test

May be obtained from any skin lesion, nasal mucosa and/or ear lobe. This test has sensitivity of 50% and specificity of 100%. After collection of the specimen, to visualize the bacteria, the Ziehl-Neelsen stain should be used. Developing countries with low resources and innovative techniques should base the diagnosis on clinical signs, and results from the smear test.[1][2][3][4]

Skin Biopsy

A biopsy of the skin lesion should be performed and stained according to the Fite-Faraco technique (a especially designed protocol for staining the leprosy bacilli). [1]

Lepromin Test

Although not a diagnostic test, the lepromin skin test is used to classify and determine the prognosis of the condition. For this test it is used the inactivated form of Mycobacterium leprae, extracted from lepromas:[1]

1. Early reaction (Fernandez reaction):
2. Later reaction (Mitsuda reaction):

Serology

The serology test using the PGL-1 antibody titer (Phenolic Glycolipid 1) is particularly indicated for multibacillary cases. Yet, it is not a good test for paucibacillary leprosy. Because of its lack of sensitivity the test is not available in the United States.[1][5][6][7][8]

Polymerase Chain Reaction

High sensitivity and specificity test, particularly useful when histologic results are inconclusive. Because it is an expensive test it is rarely used in developing countries.[1]

References

  1. 1.0 1.1 1.2 1.3 1.4 Eichelmann, K.; González González, S.E.; Salas-Alanis, J.C.; Ocampo-Candiani, J. (2013). "Leprosy. An Update: Definition, Pathogenesis, Classification, Diagnosis, and Treatment". Actas Dermo-Sifiliográficas (English Edition). 104 (7): 554–563. doi:10.1016/j.adengl.2012.03.028. ISSN 1578-2190.
  2. Hatta M, van Beers SM, Madjid B, Djumadi A, de Wit MY, Klatser PR (1995). "Distribution and persistence of Mycobacterium leprae nasal carriage among a population in which leprosy is endemic in Indonesia". Trans R Soc Trop Med Hyg. 89 (4): 381–5. PMID 7570870.
  3. Aggarwal A, Pandey A (2010). "Inverse sampling to study disease burden of leprosy". Indian J Med Res. 132: 438–41. PMID 20966523.
  4. Ramaprasad P, Fernando A, Madhale S, Rao JR, Edward VK, Samson PD; et al. (1997). "Transmission and protection in leprosy: indications of the role of mucosal immunity". Lepr Rev. 68 (4): 301–15. PMID 9503866.
  5. Silva EA, Iyer A, Ura S, Lauris JR, Naafs B, Das PK; et al. (2007). "Utility of measuring serum levels of anti-PGL-I antibody, neopterin and C-reactive protein in monitoring leprosy patients during multi-drug treatment and reactions". Trop Med Int Health. 12 (12): 1450–8. doi:10.1111/j.1365-3156.2007.01951.x. PMID 18076551.
  6. Banerjee S, Sarkar K, Gupta S, Mahapatra PS, Gupta S, Guha S; et al. (2010). "Multiplex PCR technique could be an alternative approach for early detection of leprosy among close contacts--a pilot study from India". BMC Infect Dis. 10: 252. doi:10.1186/1471-2334-10-252. PMC 2942881. PMID 20735843.
  7. Martins AC, Miranda A, Oliveira ML, Bührer-Sékula S, Martinez A (2010). "Nasal mucosa study of leprosy contacts with positive serology for the phenolic glycolipid 1 antigen". Braz J Otorhinolaryngol. 76 (5): 579–87. PMID 20963340.
  8. Butlin CR, Soares D, Neupane KD, Failbus SS, Roche PW (1997). "IgM anti-phenolic glycolipid-I antibody measurements from skin-smear sites: correlation with venous antibody levels and the bacterial index". Int J Lepr Other Mycobact Dis. 65 (4): 465–8. PMID 9465156.


Template:WikiDoc Sources