in the highest sti incidence rates were registered in bayankhongor cases per domod sukhbaatar khuvsgul govialtai tuv govisumber and domogovi aimags and ulaanbaatar city the morbidity of trichomoniasis was higher in domod bayankhongor bulgan and sukhbaatar aimags and ulaanbaatar city and was higher there than the national average and aimag average the incidence of hiv infection has slowly increased in mongolia since