Differential diagnosis of diffuse maculopapular rash are :
-drug rash
-measles
-rubella
-exanthem subitum
-typhoid fever
-leptospirosis
-secondary syphilis
-lyme disease
-rat bite fever
-relapsing fever
-ehrlichiosis
-epidemic typhus
-endemic typhus
-erythema marginatum
-scrub typhus
-adult Still’s disease
-systemic lupus erythematosus
-erythema infectiosum
-dengue
-infectious mononucleosis
-primary HIV infection
-drug rash
-measles
-rubella
-exanthem subitum
-typhoid fever
-leptospirosis
-secondary syphilis
-lyme disease
-rat bite fever
-relapsing fever
-ehrlichiosis
-epidemic typhus
-endemic typhus
-erythema marginatum
-scrub typhus
-adult Still’s disease
-systemic lupus erythematosus
-erythema infectiosum
-dengue
-infectious mononucleosis
-primary HIV infection