<prompt> Transovarian transmission is seen in which infection -PlagueFilarialGuineaRocky Mountain spotted fever  <response>: Transovarial transmission is done by Ticks. Tick born disease above is RMSF caused by Rickettsia rickettsii REF: PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 840 