Table 1 Case definitions for scabies using the 2018 IACS Criteria

 A1:

Mites, eggs or feces on light microscopy of skin samples

No

 A2:

Mites, eggs or feces visualized on individual using high powered imaging device

No

 A3:

Mite visualized on individual using dermoscopy

No

 B1:

Presence of burrows

Yes*

 B2:

Typical lesions affecting male genitalia

No

 B3:

(Typical lesions) and (typical distribution) and (itch) and (contact history)

Yes

 C1:

(Typical lesions) and (typical distribution) and (itch) or (contact history)

Yes

 C2:

(Atypical lesions) or (atypical distribution) and (itch) and (contact history)

Yes