Campylobacter foetus also known as Vibrio foetus that is why it called as vibriosis, transmitted between cows through bull ,animal may show following signs, the animal abort upto fifth mounth of pregnancy, and become repeater ,after few mounth amimal become immuneand will resume normal fertility,the organism is well sensitive to anti biotic, its growth can easily be checked by adding antibiotic in semen for artificial insemination.

Trichomonas foetus,

this is porozoan organism, live in bovine prepuce, ,vagina,and uterus,infected animal may show irregular cycle, low conception rate, vulval discharge,early abortion and pyometra, through its chances become less as it become dead in frozen semen.

brucellosis brucella abortus transmission of this organism via semen through artificial insemination is of boubtful significance,

some oppurtunistic bacteria may cause uterine infection in female ,the exemple of that ,corynebacterium pyogenes,E.coli,fusobacterium necrophorum, staphloccocus,or stretococcus some speices,but this can easily be checked by adding proper antibiotic in semen for artificial insemination.