<prompt> Which of the following is not caused by virus:Rocky mountain spotted feverKFDDengueYellow fever  <response>: Ans. a Rocky mountain spotted feverRef: Microbiology by Ananthanarayan and Paniker 8th ed. 406, 408, 413DiseaseCausative agentRMSF Rocky Mountain Spotted FeverR. RickettsiiKyasanur forest diseaseGroup B togavirus FlavivirusDengueArbovirus 4 serotypes Den- 1,2,3,4Yellow feverFlavivirus fibricus 