<prompt> Which of the following does not have non - human reservoirSalmonella typhiN. GonorrhoeaE coliClostridium tetani  <response>: Reservoir of infection: man is only the known reservoir of infection, viz cases and carries Cases- mild , moderate and severe Carriers -temporary or chronic Ref: 25th edition, Parks Textbook of Preventive and Social Medicine, Page no. 257 