Fabric and textile conditioning compositions containing particular combinations of cationic polymers and anionic surfactants are disclosed. Certain novel compositions are useful, inter alia, in the prevention, inhibition andor treatment of dengue fever, dengue fever shock syndrome or dengue hemorrhagic fever. A circuit board which is provided with a pair of resistance patterns is mounted on the support member, while a sliding element which is slidable on the circuit board is mounted on the manipulating knob. In the case of a perpendicular write, the write head can include a write pole arranged to provide a magnetic write field that emits a magnetic field substantially perpendicular with an Air Bearing Surface.