Abstract
Two new Salmonella serotypes, Salmonella sp. serotype malakal and Salmonella sp. serotype khartoum, have been isolated from mesenteric lymph nodes of apparently healthy dogs in the Sudan, and they belong to Salmonella subgenus I. The antigenic formulae of these serotypes are: S. malakal = 16: e,h: 1,2; S. khartoum = (3),(15), 34: a : 1,7.