The 2020 International Alliance for the Control of Scabies Consensus Criteria for the Diagnosis of Scabies.
Journal
The British journal of dermatology
ISSN: 1365-2133
Titre abrégé: Br J Dermatol
Pays: England
ID NLM: 0004041
Informations de publication
Date de publication:
11 2020
11 2020
Historique:
accepted:
07
02
2020
pubmed:
9
2
2020
medline:
15
5
2021
entrez:
9
2
2020
Statut:
ppublish
Résumé
Scabies is a common parasitic skin condition that causes considerable morbidity globally. Clinical and epidemiological research for scabies has been limited by a lack of standardization of diagnostic methods. To develop consensus criteria for the diagnosis of common scabies that could be implemented in a variety of settings. Consensus diagnostic criteria were developed through a Delphi study with international experts. Detailed recommendations were collected from the expert panel to define the criteria features and guide their implementation. These comments were then combined with a comprehensive review of the available literature and the opinion of an expanded group of international experts to develop detailed, evidence-based definitions and diagnostic methods. The 2020 International Alliance for the Control of Scabies (IACS) Consensus Criteria for the Diagnosis of Scabies include three levels of diagnostic certainty and eight subcategories. Confirmed scabies (level A) requires direct visualization of the mite or its products. Clinical scabies (level B) and suspected scabies (level C) rely on clinical assessment of signs and symptoms. Evidence-based, consensus methods for microscopy, visualization and clinical symptoms and signs were developed, along with a media library. The 2020 IACS Criteria represent a pragmatic yet robust set of diagnostic features and methods. The criteria may be implemented in a range of research, public health and clinical settings by selecting the appropriate diagnostic levels and subcategories. These criteria may provide greater consistency and standardization for scabies diagnosis. Validation studies, development of training materials and development of survey methods are now required. What is already known about this topic? The diagnosis of scabies is limited by the lack of accurate, objective tests. Microscopy of skin scrapings can confirm the diagnosis, but it is insensitive, invasive and often impractical. Diagnosis usually relies on clinical assessment, although visualization using dermoscopy is becoming increasingly common. These diagnostic methods have not been standardized, hampering the interpretation of findings from clinical research and epidemiological surveys, and the development of scabies control strategies. What does this study add? International consensus diagnostic criteria for common scabies were developed through a Delphi study with global experts. The 2020 International Alliance for the Control of Scabies (IACS) Criteria categorize diagnosis at three levels of diagnostic certainty (confirmed, clinical and suspected scabies) and eight subcategories, and can be adapted to a range of research and public health settings. Detailed definitions and figures are included to aid training and implementation. The 2020 IACS Criteria may facilitate the standardization of scabies diagnosis.
Sections du résumé
BACKGROUND
Scabies is a common parasitic skin condition that causes considerable morbidity globally. Clinical and epidemiological research for scabies has been limited by a lack of standardization of diagnostic methods.
OBJECTIVES
To develop consensus criteria for the diagnosis of common scabies that could be implemented in a variety of settings.
METHODS
Consensus diagnostic criteria were developed through a Delphi study with international experts. Detailed recommendations were collected from the expert panel to define the criteria features and guide their implementation. These comments were then combined with a comprehensive review of the available literature and the opinion of an expanded group of international experts to develop detailed, evidence-based definitions and diagnostic methods.
RESULTS
The 2020 International Alliance for the Control of Scabies (IACS) Consensus Criteria for the Diagnosis of Scabies include three levels of diagnostic certainty and eight subcategories. Confirmed scabies (level A) requires direct visualization of the mite or its products. Clinical scabies (level B) and suspected scabies (level C) rely on clinical assessment of signs and symptoms. Evidence-based, consensus methods for microscopy, visualization and clinical symptoms and signs were developed, along with a media library.
CONCLUSIONS
The 2020 IACS Criteria represent a pragmatic yet robust set of diagnostic features and methods. The criteria may be implemented in a range of research, public health and clinical settings by selecting the appropriate diagnostic levels and subcategories. These criteria may provide greater consistency and standardization for scabies diagnosis. Validation studies, development of training materials and development of survey methods are now required. What is already known about this topic? The diagnosis of scabies is limited by the lack of accurate, objective tests. Microscopy of skin scrapings can confirm the diagnosis, but it is insensitive, invasive and often impractical. Diagnosis usually relies on clinical assessment, although visualization using dermoscopy is becoming increasingly common. These diagnostic methods have not been standardized, hampering the interpretation of findings from clinical research and epidemiological surveys, and the development of scabies control strategies. What does this study add? International consensus diagnostic criteria for common scabies were developed through a Delphi study with global experts. The 2020 International Alliance for the Control of Scabies (IACS) Criteria categorize diagnosis at three levels of diagnostic certainty (confirmed, clinical and suspected scabies) and eight subcategories, and can be adapted to a range of research and public health settings. Detailed definitions and figures are included to aid training and implementation. The 2020 IACS Criteria may facilitate the standardization of scabies diagnosis.
Identifiants
pubmed: 32034956
doi: 10.1111/bjd.18943
pmc: PMC7687112
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
808-820Informations de copyright
© 2020 The Authors. British Journal of Dermatology published by John Wiley & Sons Ltd on behalf of British Association of Dermatologists.
Références
PLoS Negl Trop Dis. 2016 Jun 27;10(6):e0004803
pubmed: 27348119
J Am Acad Dermatol. 1984 Aug;11(2 Pt 1):210-5
pubmed: 6434601
Parasite Immunol. 2014 Nov;36(11):585-93
pubmed: 25081184
PLoS Negl Trop Dis. 2018 Dec 27;12(12):e0006996
pubmed: 30589906
Arch Dermatol. 2011 Apr;147(4):468-73
pubmed: 21482897
BMJ. 2013 Jan 22;346:f138
pubmed: 23341545
Trends Parasitol. 2016 Nov;32(11):843-854
pubmed: 27638231
J Am Acad Dermatol. 2007 Jan;56(1):53-62
pubmed: 17190621
Front Microbiol. 2018 May 25;9:1024
pubmed: 29887838
Trop Med Int Health. 2007 Apr;12(4):493-502
pubmed: 17445140
PLoS Negl Trop Dis. 2016 Jun 16;10(6):e0004691
pubmed: 27311065
PLoS Negl Trop Dis. 2017 Jan 19;11(1):e0005136
pubmed: 28103250
Lancet. 2000 Mar 4;355(9206):819-26
pubmed: 10711939
J Eur Acad Dermatol Venereol. 2017 Aug;31(8):1248-1253
pubmed: 28639722
Lancet. 2016 Oct 8;388(10053):1545-1602
pubmed: 27733282
Lancet Infect Dis. 2015 Aug;15(8):960-7
pubmed: 26088526
J Am Acad Dermatol. 1981 Jun;4(6):715-22
pubmed: 6787101
Br J Dermatol. 2020 Jan;182(1):197-201
pubmed: 31004505
Clin Exp Dermatol. 2017 Jul;42(5):481-487
pubmed: 28556185
Sports Health. 2019 Jan/Feb;11(1):47-58
pubmed: 30106670
Am J Clin Dermatol. 2002;3(1):9-18
pubmed: 11817965
Br J Dermatol. 2018 Oct;179(4):889-895
pubmed: 29624634
Int J Dermatol. 2012 Mar;51(3):275-82
pubmed: 22348561
Lancet. 2017 Sep 16;390(10100):1211-1259
pubmed: 28919117
Braz J Infect Dis. 2007 Aug;11(4):386-7
pubmed: 17873988
PLoS Negl Trop Dis. 2018 May 24;12(5):e0006549
pubmed: 29795566
Am J Trop Med Hyg. 2017 Sep;97(3):845-850
pubmed: 28722612
Australas J Dermatol. 2011 Nov;52(4):270-3
pubmed: 22070701
Indian J Dermatol Venereol Leprol. 2017 Jul-Aug;83(4):492-493
pubmed: 28540869
Lancet. 2019 Jul 6;394(10192):81-92
pubmed: 31178154
Clin Exp Dermatol. 2009 Aug;34(6):711-4
pubmed: 19077100
Curr Opin Infect Dis. 2012 Apr;25(2):145-53
pubmed: 22327467
JAMA Dermatol. 2018 May 1;154(5):536
pubmed: 29801071
Dermatol Clin. 2018 Jul;36(3):301-308
pubmed: 29929601
Epidemiol Infect. 2016 Aug;144(11):2462-71
pubmed: 27019288
Parasit Vectors. 2017 Jun 20;10(1):297
pubmed: 28633664
PLoS Negl Trop Dis. 2019 Aug 19;13(8):e0007635
pubmed: 31425513
Acta Derm Venereol. 2013 Sep 4;93(5):573-4
pubmed: 23722181
Ophthalmic Epidemiol. 2015;22(3):214-25
pubmed: 26158580
BMC Infect Dis. 2005 Oct 14;5:85
pubmed: 16225694
Indian J Clin Biochem. 2010 Apr;25(2):208-12
pubmed: 23105911
Bull World Health Organ. 2009 Mar;87(3):173-9
pubmed: 19377712
Lancet Infect Dis. 2017 Dec;17(12):1247-1254
pubmed: 28941561
Can J Infect Dis Med Microbiol. 2011 Winter;22(4):143-6
pubmed: 23205026
Lancet Infect Dis. 2018 Aug;18(8):894-902
pubmed: 30068499
Lancet Infect Dis. 2018 Aug;18(8):822-823
pubmed: 30068496
Trop Med Infect Dis. 2018 Aug 03;3(3):
pubmed: 30274478
J Am Acad Dermatol. 2014 Nov;71(5):1022-3
pubmed: 25437970
PLoS Negl Trop Dis. 2017 Jun 12;11(6):e0005669
pubmed: 28604804
J Gerontol A Biol Sci Med Sci. 2001 Jul;56(7):M424-7
pubmed: 11445601
Am J Trop Med Hyg. 2017 Sep;97(3):851-860
pubmed: 28722633
BMJ. 2005 Sep 17;331(7517):619-22
pubmed: 16166133
Trop Med Infect Dis. 2018 Aug 17;3(3):
pubmed: 30274484
N Engl J Med. 2006 Apr 20;354(16):1718-27
pubmed: 16625010
Br J Dermatol. 2016 Jun;174(6):1351-8
pubmed: 26801523
Lancet Infect Dis. 2006 Dec;6(12):769-79
pubmed: 17123897
PLoS One. 2013;8(3):e58231
pubmed: 23469270
Trans R Soc Trop Med Hyg. 2005 Jan;99(1):39-47
pubmed: 15550260
J Clin Diagn Res. 2016 Oct;10(10):WC01-WC05
pubmed: 27891435
Trop Med Infect Dis. 2018 Jun 04;3(2):
pubmed: 30274455
Parasit Vectors. 2017 Aug 10;10(1):385
pubmed: 28797273
PLoS Negl Trop Dis. 2013 Aug 08;7(8):e2167
pubmed: 23951369
J Dermatol. 2017 Sep;44(9):991-1014
pubmed: 28561292
PLoS Negl Trop Dis. 2018 May 17;12(5):e0006401
pubmed: 29771941
Br Med J. 1941 Sep 20;2(4211):405-6
pubmed: 20783868
J Clin Microbiol. 2015 Jul;53(7):2095-102
pubmed: 25903566
Clin Microbiol Rev. 2007 Apr;20(2):268-79
pubmed: 17428886
PLoS Negl Trop Dis. 2015 Oct 22;9(10):e0004188
pubmed: 26492406
PeerJ. 2018 Jul 27;6:e5291
pubmed: 30065882
Pediatrics. 2014 Apr;133(4):e910-6
pubmed: 24685953
Am J Trop Med Hyg. 2017 Dec;97(6):1746-1748
pubmed: 29016306