-

This research was carried out to study Salmonella carrier state in five industrial dairy farms around Tabriz city in 1998. The cattle population was 2590, of which 475 cows and 281 calves were stool cultured randomly three to five times at two-week intervals. The isolated Salmonella were S. paratyphi A, S. newport, S. typhimurium, S. II and S. enteritidis. None of these serotypes are ranked as host-adapted Salmonella. In this article the importance of carriers in epidemiology of Salmonellosis is discussed.