The study was concentrated on environmental contamination by Salmonella and Clostridium perfringens discharged from abattoir effluents in Mosul. 29 and 30 samples of wastewater were collected for the isolation of Salmonella and C.perfringens respectively in a five months study period.
14 serotypes of Salmonellae in a variable order of frequency were revealed, namely: Salmonella typhimurium, S.convallis, S.anatum, S.auto agglutinable, S.montivedeo, S.jerusalem, S.chai ly, S.worthington, S.cubana, S.muenchen, S.newport, S.dublin, S.molade and S.infantis.
It should be noted that Salmonella corvallis recovered in this study, is the new serotype firstly recorded in Iraq. Clostridium perfringens type A were revealed from all the thirty samples examined and C. perfringens type B were reveal ed from two samples (6.66%).
The health hazards of its environmental pollution as well as the proposed means to protect the public against disease were discussed.