<prompt> First to be involved in Genital tuberculosis-Uterus cornual partSerosal layer fallopian tubeSubmucosal layer fallopian tubeMuscular layer fallopian tube  <response>: Ans. is c i.e., Submucosal layer fallopian tube It is almost always a secondary infection, with primary sites being lungs, lymph nodes, abdomen, etc. Hematogenous route is the most common mode of spread from the primary site. Bilateral fallopian tubes are involved in 100 of the cases. Ampulla is the most commonly affected part of the fallopian tube. Initial site of infection is the submucosal layer interstitial salpingitis. Uterus is involved in 80 of the cases. Cornu of the uterus is commonly affected, as it is in continuity with the fallopian tube. 