Pruritic skin rash

37 y, woman, with h/o mild mental retardation, comes in with progressively spreading, intensely pruritic skin rash. Her mom was told that the patient had inadvertently shared a bed with her cousin (with h/o Down’s syndrome) who was found to have Scabies. Rash is shown in the picture.

Which of the following statement is false?

1. If the patient was African-American, she would be unlikely to develop scabies.
2. The skin rash most likely represents a hypersensitivity reaction, rather than a foreign body reaction.
3. It is a sexually transmitted disease
4. Absence of burrows in the inter-digital space makes the diagnosis unlikely- CORRECT ANSWER
5. Permethrin 5% topical, single application, is sufficient.