Table 2 Comparison of simplified diagnostic criteria to 2020 IACS criteria
| Â | 2020 IACS criteria | Simplified criteria |
|---|---|---|
History Features | ||
 Itch | Included. At least one of Itch or Contact History required | Included; not required |
 Contact History | Included. At least one of Itch or Contact History required | Not included |
Skin Examination | ||
 Body Regions | Whole body, where feasible Limited examination of exposed areas may be appropriate in field surveys | Frequently exposed areas only |
 Lesion Appearance | Atypical scabies lesions can be included if there is a typical distribution and both history features are present | Typical scabies lesions required |
 Lesion Distribution | Atypical distribution can be included where there are typical scabies lesions and both history features are present | Typical scabies distribution required |
Implementation Features | ||
 Specialised Equipment | Direct visualisation equipment for confirmed scabies, where feasible | No |
 Examiner Minimum Level | Experienced healthcare worker (nurse or physician) | Community health worker |
 Training | Longer, more specialised training and accreditation Specialised training for direct visualisation (microscopy or dermoscopy) | Brief training package |
 Examples of Suitable Settings | Clinical practice Clinical trials Accurate determination of prevalence (e.g., sentinel sites, impact surveys) | Community survey/mapping Defining areas where prevalence is likely to be ≥ 10% and a mass drug administration strategy may be recommended |