<prompt> Which of the following is the most severe form of Scabies?Norwegian scabiesNodular scabiesAnimal scabiesGenital scabies  <response>: Ans. A. Norwegian scabies Norwegiancrusted scabies is the most severe form of Scabies. The elderly, disabled, and people with an impaired immune system, such as HIV, cancer, or those on immunosuppressive medications, are susceptible to crusted scabies. The mites in crusted scabies are not more virulent than in non-crusted scabies; however, they are much more numerous up to 2 million. Large warty crusts form on the hands and feet, and the palms and soles may become irregularly thickened and fissured. Usually it is not associated with itching. The nail apparatus is frequently affected, with masses of horny debris accumulating beneath thickened and discolored nails. 