The International Alliance for the Control of Scabies has reported consensus criteria for the diagnosis of scabies. The authors are from institutions from around the world.
Patient selection: possible scabies
Parameters:
(1) direct visualization of mites, eggs or feces
(2) clinical features
(3) lesions
(4) history
Parameter
Finding
Designation
Visualization
light microscopy of skin scrapings
A1
high-power imaging device on individual
A2
dermoscopy
A3
Clinical Features
scabies burrows
B1
typical lesions on male genitalia
B2
typical lesions AND typical distribution AND (H1 and H2)
B3
Lesions
typical lesions AND typical distribution AND (H1 or H2)
C1
(atypical lesion OR atypical distribution) AND (H1 and H2)
C2
History
itch
H1
positive contact
H2
Confirmed: A1, A2 or A3
Clinical scabies: B1, B2 or B3
Suspected scabies: C1 or C2
Clinical or suspected scabies should be diagnosed if no other diagnosis can explain the findings better.
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