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Title:   Author  item
                                            Harvey, Rogeritem
                                            Droleskey, Robert

                                                         - *Bob*item
                                            Hume, Michaelitem
                                            Anderson, Robinitem
                                            Genovese, Kenneth

                                                         - *Ken*item
                                            Andrews, Kathleen

                                                         - *Kate*item
                                            Nisbet, David
  Submitted to: Current Microbiology
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 12/31/2001
                                    Publication  Date: 7/1/2002
                                    Citation: N/AInterpretive Summary:  Competitive exclusion (CE) cultures are mixtures of beneficial intestinal bacteria that are given to animals in an attempt to prevent colonization by harmful bacteria.  Salmonella and E. coli are bacteria found in swine that have the potential to cause disease in swine and humans.  In this  study, we evaluated the ability of a pig-origin CE culture to counteract the growth of Salmonella and E. coli in the laboratory.  The CE culture successfully prevented the growth of the harmful bacteria.  This is important because if it works in pigs, CE could reduce economic losses to the swine industry and improve the wholesomeness of pork in the food chain.
                                Technical Abstract:  A competitive exclusion (CE) culture of porcine cecal bacteria was developed as a continuous-flow (CF) culture in chemostats, was designated RPCF, and was used as a model to determine its usefulness against colonization by Salmonella enterica serovars Typhimurium and Choleraesuis,  and Escherichia coli strains F-18 and O157:H7 (933).  At 24 h post-inoculation, reductions (P<0.05) of Choleraesuis, F-18, and O157:H7 were observed.  Typhimurium was decreased (P<0.05) at 48 h post-inoculation, and by 120 h post-inoculation, all chemostats were negative for the four challenge organisms.  These results demonstrate that RPCF cultures were able to inhibit the growth of Typhimurium, Choleraesuis, and E. coli strains F-18 and O157:H7 in vitro and suggest the potential for the use of CE in swine to prevent disease induced by  these organisms.


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