Characteristic lesion of scabies is -
SCABIES:-Caused by Sarcoptes scabiei var hominis.Clinical features:Itching- generalised, worse at night.this is due to delayed type 4 hypersensitivity reaction. Classic lesion: Burrow-Thread like wavy tunnel in stratum corneum.They appear as serpiginous or S shaped greyish,thread like elevations with a vesicle at one end indicating the presence of mite.seen at interdigital web, feet areola,scrotum. Burrows are pathognomic of scabies. iadvl textbook of dermatology page429
Burrow
Fissure
Vesicle
Papule
Fungal infections, Scabies, Pediculosis