Submitted to: World Poultry Congress Proceedings
Publication Type: Abstract only
Publication Acceptance Date: 6/26/2004
Publication Date: 7/21/2004
Citation: Henzler, D.J., Bouldin, J.G. 2004. Isolations Of Salmonella Enteritidis And Salmonella Typhimurium From Mice In Poultry Flocks. World Poultry Congress Proceedings, p.79, 2004. Interpretive Summary:
Technical Abstract: House mice (Mus musculus), laying hens and the environments of thirty-nine poultry flocks in Pennsylvania, USA were cultured for Salmonella enteritidis and Salmonella typhimurium. Mice spleen and intestinal samples were each cultured, individually, with S. enteritidis isolated from fifteen and thirteen sample types, respectively. Thirteen of the fifteen flocks (86.7%) that had mice with S. enteritidis positive spleens also had culture positive environments. Eight of thirty-nine flocks that had S. enteritidis positive environments had mice that were negative. However, capture of small numbers of mice from four of these eight flocks may have reduced the sensitivity of mice as indicators of S. enteritidis environmental contamination. Two of nineteen flocks (10.5%) that had culture negative environments and hen tissue samples had mice that were positive for S. enteritidis. Five flocks had S. enteritidis positive mouse spleens where corresponding hens tissues (cecum, oviduct, or liver/spleen) or eggs cultured positive. Only two of eight flocks where the environment was S. enteritidis positive and the mice were S. enteritidis negative had positive hen tissues or eggs. Only one mouse was captured from the flock with the positive eggs. The other flock had one cecum positive of sixty-two hens cultured. S. typhimurium was isolated from mouse spleens in six flocks, four of which also yielded S. typhimurium from the intestines. In total, twelve flocks had S. typhimurium isolated from mice intestines of which S. typhimurium was also confirmed in three environmental samples. These data suggest mice to be excellent monitors of poultry houses contaminated with S. enteritidis and support the concept that mice provide orally invasive strains of this egg contaminating bacterium to hens.