S. Hamner, S. C. Broadway, V. B. Mishra, A. Tripathi, R. K. Mishra, E. Pulcini., B. H. Pyle and E. F. Timothy, “Isolation of Potentially Pathogenic E. Coli O157:H7 from Ganges River,” Applied and Environmental Microbiology, Vol. 73, No. 7, April 2007, pp. 2369-2372.
 S. M. Faruque, R. Khan, M. Kamruzzaman, Y. Shinji, Q. S. Ahmad, T. Azim, G. B. Nair, Y. Tekeda and A. S. Da-vid, “Isolation of Shigella dysenteriae Type 1 and S. flexneri Strains from Surface Waters in Banglades: Comparative Molecular Analysis of Environmental Shi-gella Isolates Versus Clinical Strains,” Applied and En-vironmental Microbiology, Vol. 68, No. 8, August 2002, pp. 3908-3913.
 A. Tikko, A. K Tripathi, S. C. Verma, N. Agrawal and G. Nath, “Application of PCR Fingerprinting Techniques for Identification and Discrimination of Salmonella Isolates,” Current Science, Vol. 80, No. 8, 2001, pp. 1049-1052.
 J. G. Moreno, C. Moar, F. Roman, R. Perez-Maestu and J. M. Lopez de Letona “Salmonella Endocarditis Presenting a Cerebral Hemorrhage,” European Journal of Internal Medicine, Vol. 11, No. 2, April 2000, pp. 96-97.
 J. Baudart, K. Lamarchand, A. Brisabois and P. Lebaron, “Diversity of Salmonella Strains Isolated from Aquatic Environment as Determined by Serotyping and Amplifi-cation of the Ribosomal DNA Spacer Regions,” Applied Environmental Microbiology, Vol. 66, No. 4, April 2000, pp. 1544-1552.
 N. González, J. Romero and R. T. “Espejo Comprehensive Detection of Bacterial Populations by PCR Amplification of the 16S–23S rRNA Spacer Region,” Journal of Microbiological Methods, Vol. 55, No. 1, October 2003, pp. 91-97.
 M. A. Jensen, J. A. Webster and N. Straus, “Rapid Identi-fication of Bacteria on the Basis of Polymerase Chain Reaction Amplified Ribosomal DNA Spacer Polymor-phism,” Applied Environmental Microbiology, Vol. 59, No. 4, April 1993, pp. 945-957.
 S. L. Foley, D. G. White, P. F. McDermott, R. D. Walker, B. Rhodes, P. J. Fedorka-Cray, S. Simjee and S. Zhao, “Comparison of Subtyping Methods for Differentiating Salmonella Enterica Serovar Typhimurium Isolates Ob-tained from Food Animal Sources,” Journal of Clinical Microbiology, Vol. 44, No. 10, October 2006, pp. 3569- 3577.
 E. J. Threlfall, “Antimicrobial Drug Resistance in Sal-monella: Problems and Perspectives in Food and Water Borne Infections,” FEMS Microbiology Reviews, Vol. 26, No. 2, January 2006, pp. 141-148.
 L. Ronold, Y. Anderson, J. Biritta and P. Norberg, “A Summary of Reported Food Borne Diseases Incidents in Sweden, 1992 to 1997,” Journal of Food Protection, Vol. 63, No. 10, October 2000, pp. 1315-1320.
 M. A. Jensen and R. J. Hubner, “Use of Homoduplex Ribosomal DNA Spacer Amplification Products and He-teroduplex Cross Hybridization Products in Identification of Salmonella Serovars,” Applied and Environmental Microbiology, Vol. 62, No. 8, August 1996, pp. 2741- 2746.
 C. Lagatolla, L. Dolzani, E. Tonin, A. Lavenia, M. D. Michele, T. Tommasini and C. Monti-Bragadin, “PCR Ribotyping for Characterizing Salmonella Isolates of Different Serotypes,” Journal of Clinical Microbiology, Vol. 34, No. 10, June 1996, pp. 2440-2443.