Gireesh Rajashekara, DVM, PhD

Current OSU Appointments

Associate Professor, OARDC Food Animal Health

Associate Professor, Food Science & Technology

Advising Narrative

Won 2nd place award in the OARDC research internship program (ORIP), 2009 2rd Place Oral Presentation Award at the MANAARS Annual Meeting, March, Orlando, 2010 3rd Place Oral Presentation Award at the MANAARS Annual Meeting, March, Orlando, 2010 Received 1st place in the Undergraduate Poster Research Contest at the 26th Annual MANRRS Conference, March 31- April 2, 2011, Sheraton Overland Park at the Convention Center Overland Park, Kansas Second place oral presentation award at the The OARDC Research Internships Program (ORIP) , 2010 Undergraduate First place oral presentation award at the The OARDC Research Internships Program (ORIP) , 2011 Selected for the Nationawide OSU graduate school sponsored Summer Research Opportunities Program (SROP)

Chapters in Books

Nagaraja, K.V. and G. Rajashekara. "Vaccination against Salmonella enteritidis infection: Dilemma and realities." In Salmonella enterica serovar Enteritidis in humans and animals: Epidemiology, Pathogenesis and Control. Edited by A. M. Saeed. -. Ames, IA: Iowa State University Press, January 1998.

Conferences

Back. A., R.G. Suryanarayanan, G. Rajashekara and K.V. Nagaraja. "Preparation of Microspheres for use in vaccine delivery." Proc. 76th Annual Meeting of CRWAD. (January 1995). .

Back, A, G. Rajashekara, D. Halvorson and K.V. Nagaraja. "Ornithobacterium rhinotracheale Infection in turkeys." Proc. 47th NCAD conference and Symposium on Making and Evaluating Health Management Decisions. (January 1996). 48-50.

Rajashekara, G., R., A. Back, K. V. Nagaraja, T. Koeuth. J. R. Lupski and V. Kapur. "Molecular genotyping of Salmonella enteritidis by repetitive PCR using a novel Repetitive sequence." Proc. 77th Annual Meeting of CRWAD. (January 1996). .

Rajashekara, G., A. Back, V. Kapur, T. Koeuth, J. R. Lupski and K. V. Nagaraja. "Repetitive sequence based PCR (rep-PCR) fingerprinting of Salmonella enteritidis." Proc. 47th NCAD conference and Symposium on Making and Evaluating Health Management Decisions. (January 1996). 51-52.

Nagaraja, K. V., L. A. Bichler, A. Back and G. Rajashekara. "Adhesion and Invasion of HeLa cells, HD-11 and Grnulosa cells by S. enteritidis." Proceedings of 133rd AVMA. (July 1996). 360-.

Alberto Back, Suryanarayanan, G. Rajashekara and K.V. Nagaraja. "Use of Microspheres in the Delivery of Vaccines for poultry." Proceedings of 133rd AVMA. (July 1996). 387-.

Nagaraja, K. V., C. J. Kim, G. Rajashekara, and A. Back. "Agar Gel Enzyme Linked (AGEA) and Radial Immunodiffusion Enzyme Linked Assay (RIDEA) as Sensitive and Specific tests for S. enteritidis." Proc. International Symposium on Salmonella and Salmonellosis. (May 1997). 49-51.

Rajashekara, G., T. Koeuth, K.V. Nagaraja, A. Back, J. Lupski and V. Kapur. "Molecular genotyping of US isolates of Salmonella enteritidis PT4 from different sources." Proc. 46th WPDC. (January 1997). 58-59.

Rajashekara, G., C. M. Lamichhanne, S. Munir, A. Back, D. A. Halvorson and K. V. Nagaraja. "Specificity and Sensitivity of SEF14 antigen for detection of Salmonella enteritidis infection in poultry." Proc. 48th NCADC and Symposium on New Vaccines and Delivery Systems. (January 1997). 17-18.

Rajashekara, G., C. M. Lamichhanne, S. Munir, A. Back, D. A. Halvorson and K. V. Nagaraja. "Construction of Salmonella enteritidis fimbrial mutants." Proc. 78th Annual Meeting of CRWAD. (January 1997). 10-.

Nagaraja, K.V., G. Rajashekara and A. Back. "Fimbrial protein for specific detection of S. enteritidis infection." Proc. 46th WPDC. (January 1997). 55-.

Nagaraja, K. V., G. Rajashekara, et al.. "Sero-diagnosis of Salmonella enteritidis infection in poultry using a recombinant SEF14 antigen." Proc. USAHA Salmonella committee abstracts. (January 1997). 22-23.

Back. A., S. J. Sprenger, G. Rajashekara, D. A. Halvorson and K.V. Nagaraja. "Antimicrobial sensitivity of Ornithobacterium rhinotracheale isolated from different geographic locations." Proc. 48th NCADC and Symposium on New Vaccines and Delivery Systems. (January 1997). 22-24.

Back, A., D. Halvorson, G. Rajashekara and K.V. Nagaraja. "Serological detection of Ornithobacterium rhinotracheale (ORT) infection in turkeys." Proc. 78th Annual Meeting of CRWAD. (January 1997). 22-.

Back, A. G. Rajashekara, D. A. Halvorson and K.V. Nagaraja. "Experimental studies on O. rhinotracheale infection." Proc. 46th WPDC. (January 1997). 7-8.

Straub. D. E., D. A. Emery, K.V. Nagaraja, D.A. Halvorson, A. Back, G. Rajashekara and V. Sivanandan. "Evaluation of Vector Vax FP-N for Controlling Newcastle Disease Virus (NDV) in Commercial Turkeys." Proc. 48th NCADC and Symposium on New Vaccines and Delivery Systems. (January 1997). 22-24.

Rajashekara, G., A. Back, S. Munir., V. Kapur, D. A. Halvorson and K.V. Nagaraja. "Application of Recombinant Fimbrial Protein Antigen for specific Detection of S. enteritidis Infection in Poultry." Proceedings of 134th AVMA. (July 1997). 167-.

Nagaraja, K. V., G. Rajashekara, A. Back, V. Kapur and D. A. Halvorson. "SERE-PCR, Fingerprinting of S. enteritidis." Proceedings of 134th AVMA. (July 1997). 157-.

Back, A., G. Rajashekara and K.V. Nagaraja. "Use of Iron Restriction Media in the Development of Salmonella Vaccine." Proceedings of 134th AVMA. (July 1997). 166-.

Rajashekara, G., A. Back, K. V. Nagaraja, S. Munir and D. A. Halvorson. "Studies on the Role of Fimbriae in the Pathogenesis of Salmonella enteritidis Infection Using Fimbrial Gene Knockouts." Proceedings of 135th AVMA. (July 1998). .

Nagaraja, K. V., A. Back, G. Rajashekara, S. Munir and D. A. Halvorson. "Use of Integration plasmid to Generate Site-Directed Mutations in Salmonella enteritidis Genome." Proceedings of 135th AVMA. (July 1998). .

Nagaraja, K.V., A. Back, S. J. Sprenger, G. Rajashekara and D. A. Halvorson. "Tissue distribution post-infection and antimicrobial sensitivity of Ornithobacterium rhinotracheale." Proc. 47th WPDC. (January 1998). 57-60.

Rajashekara, G., B. Froehlich, and J. R. Scott. "Transcription of the enterotoxigenic Escherichia coli virulence regulator Rns is negatively regulated by drr." Proceedings of the Third meeting on Microbial Pathogenesis and Host Response, Cold Spring Harbor Laboratory. (October 2001). .

Rajashekara, G., D. Glover, T. Harris, and G. A. Splitter. "Visualizing Brucella infections in live mice using bioluminescent Brucella melitensis." 55th Annual Brucellosis Research Conference. (November 2002). .

Rajashekara, G., J. Glasner, D. Glover, and G. A. Splitter. "Brucella virulence mechanisms: Functional genomics and Real time in vivo pathogenesis." Great Lakes Regional Center for Excellence for Biodefense and Emerging Infectious Diseases Research, Annual Meeting. (December 2003). .

Rajashekara, G., J. Glasner, D. Glover, M. Krepps and G. A. Splitter. "Do Brucella have pathogenicity Islands?." 57th Annual Brucellosis Research Conference. (November 2004). .

Rajashekara, G., D. Glover, M. Krepps and G. A. Splitter. "Temporal analysis of Pathogenic events in virulent and avirulent B. melitensis infection." Great Lakes Regional Center for Excellence for Biodefense and Emerging Infectious Diseases Research, Second Annual Meeting. (December 2004). .

Rajashekara, G., and G. A. Splitter. "Human Brucellosis vaccines: Identification of Vaccine targets." Great Lakes Regional Center for Excellence for Biodefense and Emerging Infectious Diseases Research, Third Annual Meeting. (December 2005). .

Xu, X., Rajashekara, G. and Miller, S. "Construction of bioluminescent Clavibacter michiganensis subsp. michiganensis." APS annual meeting proceeding. (July 2008). S174-S174.

N. Weida, S. Grewal, Q. Zhang, J. Byeong Hwa, D. Gangaiah, G. Rajashekara. "TAT Protein Export Pathway in Campylobacter jejuni." ASM 108th General Meeting. (June 2008). .

Xu, X., Rajashekara, G. and Miller, S. A. "Construction of bioluminescent Clavibacter michiganensis subsp. michiganensis." Proceedings, 23rd Annual Tomato Disease Workshop. (October 2008). .

M. Drozd, B. Jeon, D. Gangaiah, Z. Liu, Q. Zhang, and G. Rajashekara. "The Campylobacter jejuni Twin-Arginine Translocation System is Important for Chicken Colonization." Annual CRWAD Meeting. (December 2008). .

D. Gangaiah, B. Adhikari, B. Jeon, Y. Sannad, Q. Zhang and G. Rajashekara. "Studies on Polyphosphate kinases of Campylobacter jejuni." Annual CRWAD Meeting. (December 2008). .

Y. M. Sanad, J. T. LeJeune, Z. Liu, D. Gangaiah, I. Kassem, M. Abbley, W. Gebreyes and G. Rajashekara.. "Molecular Epidemiological studies on Campylobacter species in cattle." 90th Annual Meeting of CRWAD. (December 2009). .

Dharanesh Gangaiah , Issmat I. Kassem, Byeonghwa Jeon, Zhe Liu, Qijing Zhang, and Gireesh Rajashekara. "Polyphosphate Kinase 1 is Important for VBNC Formation, Natural Transformation and Antimicrobial Resistance in Campylobacter jejuni." 15th International workshop on Campylobacter, Helicobacter and Related Organisms. (September 2009). .

Rajashekara, Gireesh. "Campylobacter jejuni stress responses and in vivo colonization: Relevance to food safety." International conference on Food, Environment, and Health. (June 2009). .

D. Gangaiah, B. Adhikari, B. Jeon, Q. Zhang , Z. Liu, Y. Sanad, M. Drozd, and G. Rajashekara. "Deciphering the role of Polyphosphate kinases in Campylobacter jejuni colonization/ pathogenesis." 146th Annual AVMA Convention. (July 2009). .

Dharanesh Gangaiah, Issmat I. Kassem, Zhe Liu, Yasser Sanad and Gireesh Rajashekara.. "Role of polyphosphate kinase 2 in Campylobacter jejuni stress responses, host colonization and pathogenesis.." 90th Annual Meeting of the CRWAD. (December 2009). .

Mary Drozd, Dharanesh Gangaiah and Gireesh Rajashekara. "Small molecule inhibitors as anti-Campylobacter jejuni drug candidates." 61st NCADC. (March 2010). .

Dharanesh Gangaiah, Zhe Liu, Jesus Arcos, Yasser Sanad, Jordi B. Torreles and Gireesh Rajashekara.. "Campylobacter jejuni polyphosphate kinase 2 mediates poly P-dependent GTP synthesis and is important for chicken colonization.." 61st NCADC. (March 2010). .

Y. M. Sanad, Z. Liu, I. Kassem, D. Gangaiah, J. T. LeJeune, G. Rajashekara.. "Molecular Epidemiology of Campylobacter isolated from cattle across the U.S.." OARDC Annual Research Conference. (April 2010). .

Issmat I. Kassem, D. Gangaiah, G. Rajashekara.. "The twin arginine translocase (TAT) secretion system is important for small organic acid metabolism and chemotaxis in Campylobacter jejuni.." The 110th General Meeting of the American Society for Microbiology. (May 2010). .

Dharanesh Gangaiah, Zhe Liu, Jesus Arcos, Issmat I. Kassem, Yasser Sanad, Jordi B. Torreles and Gireesh Rajashekara.. "Polyphosphate kinase 2 mediates poly P-dependent GTP synthesis and is important for stress responses and virulence in Campylobacter jejuni.." 110th General Meeting of the ASM held from May 23-27. (May 2010). .

Mary Drozd*, Dharanesh Gangagiah and Gireesh Rajashekara.. "Anti-Campylobacter drug candidates targeting the Twin-Arginine Translocation System with small molecules." The 2010 OARDC Annual Research Conference. (April 2010). .

Xiulan Xu, Gireesh Rajashekara and Sally A. Miller.. "Visualization of Clavibacter michiganensis subsp. michiganensis colonization of tomato seedlings using a bioluminescent strain." APS annual meeting proceeding. (August 2010). 1-.

Issmat I. Kassem, Y. Sanad, D. Gangaiah, M. lilburn, J. Lejeune, G. Rajashekara.. "Survival of bioluminescentCampylobacter species in chicken litter.." The Annual Meeting of the Ohio Branch of ASM,. (April 2010). .

Dharanesh Gangaiah, Zhe Liu, Jesus Arcos, Issmat I. Kassem, Yasser Sanad, Jordi B. Torreles and Gireesh Rajashekara.. "Polyphosphate kinase 2 is a novel pathogenesis/colonization determinant in Campylobacter jejuni.." OARDC Annual Conference, 2010. (April 2010). .

FulyaBaysal-Gurel, XiulanXu, GireeshRajashekara and Sally A. Miller. "Effect of Disinfectants on Transmission of Clavibacter michiganensissubsp. michiganensisduring Grafting." APS annual meeting procedings. (August 2010). 1-.

Yasser Sanad, Issmat I. Kassem, Jun Lin, Jeffrey LeJeune, Gireesh Rajashekara.. "Epidemiological implications of the invasion associated marker in Campylobacter jejuni isolated from cattle.." 91st Annual Meeting of CRWAD. (December 2010). .

Mary Drozd, Dharanesh Gangaiah and Gireesh Rajashekara.. "Contribution of PhoAcj to twin arginine translocation mediated Campylobacter jejuni function and resilience to environmental stresses.." 91st Annual Meeting of the CRWAD. (December 2010). .

Yasser M. Sanad*, Jeffrey T. LeJeune, Gireesh Rajashekara.. "The Occurrence and Public Health Relevance of Campylobacter jejuni Isolated from Dairy Cattle and European Starlings in Ohio, USA." 16th International Workshop on Campylobacter, Helicobacter and Related Organisms (CHRO) 2011. (September 2011). .

K. Chandrashekhar, L. Heisler, D. Gangaiah, S. Wijeratne, A. Wijeratne, T. Meulia, C. Nislow, G. Rajashekara,. "Identification of PPK-1 and PPK-2 dependent transcriptome responses in Campylobacter jejuni." Conference of Research Workers in Animal Diseases (CRWAD). (December 2011). .

K. Chandrashekhar, D. Gangaiah, G. Rajashekara,. "Characterization of the methyl accepting chemotaxis proteins in Campylobacter jejuni." Conference of Research Workers in Animal Diseases. (December 2011). .

Y. M. Sand*, I. I. Kassem, M. Abley, W. Gebreyes, J. LeJeune, G. Rajashekara.. "The Occurrence of Campylobacter in Cattle: an Assessment of Potential Risks to Public Health in the US." Proc. 111th ASM Mtg., New Orleans, May 20-24, 2011. (May 2011). .

Issmat I Kassem1, Melinda Wolboldt1, Yasser Sanad1, Jonathan W. Olson2, Gireesh Rajashekara1.. "The Role of Respiratory Proteins in Campylobacter jejuni Adaptation to Different Temperature and Oxygen conditions." Proc. 111th ASM Mtg., New Orleans, May 20-24, 2011.. (May 2011). .

I. I. Kassem1, Y. Sanad1, M. Khatri1, M. Esseili1, M. Wolboldt1, J. W. Olson2, G. Rajashekara1. "The Role of TAT-Associated Respiratory Proteins (TARPS) in Campylobacter jejuni adaptation to the host environment." CHRO annual meeting proceeding. (September 2011). 58/A60-.

Yasser M. Sanad*, Jeffrey T. LeJeune, Gireesh Rajashekara.. "The Occurrence and Public Health Relevance of Campylobacter jejuni Isolated from Dairy Cattle and European Starlings in Ohio, USA.." CHRO annual meeting proceeding. (September 2011). 61/A74-.

Xiulan Xu, Gireesh Rajashekara,Pierce A. Paul and Sally A. Miller. "Colonization of Tomato Seedlings by Bioluminescent Clavibacter michiganensissubsp. michiganensisunder Different Humidity Regimes." APS annual meeting proceedings. (August 2011). 1-.

K. Chandrashekhar, L. Heisler, D. Gangaiah, S. Wijeratne, A. Wijeratne, T. Meulia, C. Nislow, G. Rajashekara. "Identification of PPK-1 and PPK-2 dependent transcriptome responses in Campylobacter jejuni." CRWAD annual meeting proceeding. (December 2011). 76/101-.

K. Chandrashekhar, D. Gangaiah, G. Rajashekara,. "Characterization of the methyl accepting chemotaxis proteins in Campylobacter jejuni.." CRWAD proceeding. (December 2011). 60/012-.

2. Chandrashekhar, K. Ganagaiah, D. Jeon, B and Rajashekara, G.. "2. Chandrashekhar, K. Ganagaiah, D. Jeon, B and Rajashekara, G. 2012. Characterization of methyl accepting chemotaxis proteins of Campylobacter jejuni.." PHPID annual meeting proceedings. (April 2012). 1-.

Kandasamy S, Chattha KS, Vlasova A, Rajashekara G, Saif LJ. "Probiotics augment B cell responses to oral rotavirus vaccine in neonatal gnotobiotic pigs." Conference proceeding. (July 2012). 1-.

Isaac P. Kashoma, Yasser M. Sanad, Serpil Baspinar, Gokben Ozbey, Issmat I. Kassem, Anand Kumar, Tim Barman and Gireesh Rajashekara.. "Prevalence, Phenotypic and Genotypic Properties of Campylobacter species from Turkeys." conference proceeding. (April 2012). 1-.

3. A.Kumar, D.Gangaiah, K.Chandrashekhara, J.Arcos, J.Torrelles, and G.Rajashekara.. "Role of Exopolyphosphatase/ Guanosine Pentaphosphate Phosphohydrolase (PPX/GPPA) Enzymes of Campylobacter jejuni.." Conference proceeding. (April 2012). 1-.

5. A.Kumar, D.Gangaiah, K.Chandrashekhara, J.Arcos, J.Torrelles, and G.Rajashekara.. ". Role of Exopolyphosphatase/ Guanosine Pentaphosphate Phosphohydrolase (PPX/GPPA) Enzymes of Campylobacter jejuni.." Conference proceeding. (December 2012). 002-.

1. A.Kumar, D.Gangaiah, J.Arcos, J.Torrelles, and G.Rajashekara.. "Characterization of Exopolyphosphatase/ Guanosine Pentaphosphate Phosphohydrolase (PPX/GPPA) Enzymes of Campylobacter jejuni .." conference proceeding. (February 2012). 1-.

Yasser M. Sanad, Gary Closs Jr, Anand Kumar, Jeffrey T. LeJeune, Gireesh Rajashekara.. "Genotypic and Phenotypic Properties of Campylobacter Isolated from Dairy Cattle and European Starlings in Ohio, USA.." Conference proceeding. (March 2012). 10-.

Chattha KS, Vlasova A, Esseli M, Kandasamy S, Siegismund C, Rajashekara G, Saif LJ. "Probiotics and lactogenic immune factors affect neonatal B cell responses to oral rotavirus vaccine." Conference proceeding. (March 2012). 1-.

Chandrashekhar, K. Gangaiah,D. Rajashekara, G. "Chemotaxis proteins in Campylobacter jejuni: more than just chemotaxis.." NCADC annual meeting proceedings. (March 2012). 12-.

2. A.Kumar, D.Gangaiah, J.Arcos, J.Torrelles, and G.Rajashekara.. "Exopolyphosphatase/ Guanosine Pentaphosphate Phosphohydrolase (PPX/GPPA) Enzymes of Campylobacter jejuni.." Conference proceedings. (March 2012). 11-.

Issmat I. Kassem, M. Khatri, Y. Sanad, M. Wolboldt, J. W. Olson, G. Rajashekara.. "The methylmenaquinol:fumarate reductase (Mfr) contributes to oxidative stress responses and host colonization potential of Campylobacter jejuni.." ASM annual meeting proceeding. (June 2012). 1-.

Journal Articles

Kinde H., D. H. Read, A. Ardans, H. Little, D. Keri, G. Rajashekara, and K. V. Nagaraja. "Sewage effluent: Source of Salmonella enteritidis Phage Type 4 infection and disease in a commercial chicken layer flock in Southern California." Avian Diseases. Vol. 40, (January 1996.): 672-676.

Back, A; Rajashekara, G; Jeremiah, R, B; Halvorson, D, A; Nagaraja, K V. "Tissue distribution of Ornithobacterium rhinotracheale in experimentally infected turkeys.." The Veterinary record. Vol. 143, no. 2. (January 1998.): 52-3.

Back, A; Halvorson, D; Rajashekara, G; Nagaraja, K V. "Development of a serum plate agglutination test to detect antibodies to Ornithobacterium rhinotracheale.." Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc. Vol. 10, no. 1. (January 1998.): 84-6.

Rajashekara, G; Munir, S; Lamichhane, C, M; Back, A; Kapur, V; Halvorson, D, A; Nagaraja, K V. "Application of recombinant fimbrial protein for the specific detection of Salmonella enteritidis infection in poultry.." Diagnostic microbiology and infectious disease. Vol. 32, no. 3. (January 1998.): 147-57.

Rajashekara, G; Koeuth, T; Nevile, S; Back, A; Nagaraja, K, V; Lupski, J, R; Kapur, V. "A widely dispersed bacterial repetitive DNA element, SERE." Journal of medical microbiology. Vol. 47, no. 6. (January 1998.): 489-97.

Rajashekara, G.; Wanduragala, D.; Halvorson, D. A.; Nagaraja, K. V.. "A rapid strip immunoblot assay for the specific detection of Salmonella enteritidis infection in chickens." International Journal of Food Microbiology. Vol. 53, no. 1. (January 1999.): 53-60.

Rajashekara, G., E. Haverly, D. A. Halvorson, K. E. Ferris, D. C. Lauer, and K. V. Nagaraja. "Multidrug-resistant S. Typhimurium DT 104 from poultry." J. Food Prot. Vol. 63, (January 1999.): 155-161.

Rajashekara, G., D. Wanduragala, D. A. Halvorson and K. V. Nagaraja. "rSEF14-RSIA for the Specific Detection of Salmonella enteritidis Infection in Poultry." Int. J. Food Microbiol. Vol. 53, (January 1999.): 53-60.

Shin, H, J; Rajashekara, G; Jirjis, F, F; Shaw, D, P; Goyal, S, M; Halvorson, D, A; Nagaraja, K V. "Specific detection of avian pneumovirus (APV) US isolates by RT-PCR.." Archives of virology. Vol. 145, no. 6. (January 2000.): 1239-46.

Rajashekara, G; Munir, S; Alexeyev, M, F; Halvorson, D, A; Wells, C, L; Nagaraja, K V. "Pathogenic role of SEF14, SEF17, and SEF21 fimbriae in Salmonella enterica serovar enteritidis infection of chickens.." Applied and environmental microbiology. Vol. 66, no. 4. (January 2000.): 1759-63.

Lopes, V; Rajashekara, G; Back, A; Shaw, D, P; Halvorson, D, A; Nagaraja, K V. "Outer membrane proteins for serologic detection of Ornithobacterium rhinotracheale infection in turkeys.." Avian diseases. Vol. 44, no. 4. (January 2000.): 957-62.

Kinde, H; Shivaprasad, H, L; Daft, B, M; Read, D, H; Ardans, A; Breitmeyer, R; Rajashekara, G; Nagaraja, K, V; Gardner, I A. "Pathologic and bacteriologic findings in 27-week-old commercial laying hens experimentally infected with Salmonella enteritidis, phage type 4.." Avian diseases. Vol. 44, no. 2. (January 2000.): 239-48.

Rajashekara, Gireesh; Nagaraja, Kakambi V.; Kapur, Vivek. "Recombinant Sef14 fimbrial protein from Salmonella." Official Gazette of the United States Patent and Trademark Office Patents. Vol. 1265, no. 3. (January 2002.): -.

Rajashekara, Gireesh; Glasner, Jeremy D.; Glover, David A.; Splitter, Gary A.. "Comparative whole-genome hybridization reveals genomic islands in Brucella species." Journal of Bacteriology. Vol. 186, no. 15. (January 2004.): 5040-5051.

Baek, Seung-Hun; Rajashekara, Gireesh; Splitter, Gary, A; Shapleigh, James P. "Denitrification genes regulate Brucella virulence in mice.." Journal of bacteriology. Vol. 186, no. 18. (January 2004.): 6025-31.

Rajashekara, Gireesh; Glover, David A.; Krepps, Michael; Splitter, Gary A.. "Temporal analysis of pathogenic events in virulent and avirulent Brucella melitensis infections." Cellular Microbiology. Vol. 7, no. 10. (January 2005.): 1459-1473.

Rajashekara, Gireesh; Krepps, Michael; Eskra, Linda; Mathison, Angela; Montgomery, Alison; Ishii, Yohei; Splitter, Gary. "Unraveling Brucella genomics and pathogenesis in immunocompromised Irf-1(-/-) mice." American Journal of Reproductive Immunology. Vol. 54, no. 6. (January 2005.): 358-368.

Zhu, Jun; Qiu, Zhaohua; Wiese, Christiane; Ishii, Yohei; Friedrichsen, Jen; Rajashekara, Gireesh; Splitter, Gary A.. "Nuclear and mitochondrial localization signals overlap within bovine herpesvirus 1 tegument protein Vp22." Journal of Biological Chemistry. Vol. 280, no. 16. (January 2005.): 16038-16044.

Anderson, Bradley, D; Gilson, Michael, C; Scott, Abigail, A; Biehl, Bryan, S; Glasner, Jeremy, D; Rajashekara, Gireesh; Splitter, Gary, A; Perna, Nicole T. "CGHScan: finding variable regions using high-density microarray comparative genomic hybridization data.." BMC genomics. Vol. 7, (January 2006.): 91-.

Rajashekara, Gireesh; Glover, David, A; Banai, Menachem; O'Callaghan, David; Splitter, Gary A. "Attenuated bioluminescent Brucella melitensis mutants GR019 (virB4), GR024 (galE), and GR026 (BMEI1090-BMEI1091) confer protection in mice.." Infection and immunity. Vol. 74, no. 5. (January 2006.): 2925-36.

Rajashekara, Gireesh; Eskra, Linda; Mathison, Angie; Petersen, Erik; Yu, Qiqi; Harms, Jerome; Splitter, Gary. "Brucella: functional genomics and host-pathogen interactions." Animal Health Research Reviews. Vol. 7, no. 1-2. (January 2006.): 1-11.

Swartz, Trevor E.; Tseng, Tong-Seung; Frederickson, Marcus A.; Paris, Gaston; Comerci, Diego J.; Rajashekara, Gireesh; Kim, Jung-Gun; Mudgett, Mary Beth; Splitter, Gary A.; Ugalde, Rodolfo A.; Goldbaum, Fernando A.; Briggs, Winslow R.; Bogomolni, Roberto A.. "Blue-light-activated histidine kinases: Two-component sensors in bacteria." Science (Washington D C). Vol. 317, no. 5841. (January 2007.): 1090-1093.

Rambow-Larsen AA; Rajashekara G; Petersen E; Splitter G. "Putative quorum-sensing regulator BlxR of Brucella melitensis regulates virulence factors including the type IV secretion system and flagella.." Journal Of Bacteriology. Vol. 190, no. 9. (May 2008.): 3274-.

Rajashekara G, Covert J, Petersen E, Eskra L, Splitter G. "Genomic island 2 of Brucella melitensis is a major virulence determinant: functional analyses of genomic islands.." Journal Of Bacteriology. Vol. 190, no. 18. (September 2008.): 6243-.

Rajashekara, G, Drozd, M., Gangaiah, D., Jeon, B., Liu, Z., and Zhang, Q.. "Campylobacter jejuni Twin Argenine Translocation System is important for stress tolerance and In vivo colonization." Foodborne pathogens and Dis. Vol. 6, no. 8. (October 2009.): 935-945.

Dharanesh Gangaiah, Issmat I. Kassem, Zhe Liu, and Gireesh Rajashekara. "Polyphosphate Kinase 1 is Important for VBNC Formation, Natural Transformation and Antimicrobial Resistance in Campylobacter jejuni." Applied Environmental Microbiology. Vol. 75, no. 24. (December 2009.): 7838-7849.

Drozd M, Kassem II, Gebreyes W, Rajashekara G.. "A quantitative polymerase chain reaction assay for detection and quantification of Lawsonia intracellularis.." J Vet Diagn Invest.. Vol. 22, no. 2. (March 2010.): 265-269.

Issmat I. Kassem, Yasser Sanad, Dharanesh Gangaiah, Michael Lilburn, Jeffery Lejeune, Gireesh Rajashekara.. "Use of bioluminescence imaging to monitor Campylobacter survival in chicken litter.." J Appl Microbiol. Vol. 109, no. 6. (December 2010.): 1988-1997.

Dharanesh Gangaiah, Zhe Liu, Jesús Arcos, Issmat I. Kassem, Yasser Sanad, Jordi B. Torrellesand Gireesh Rajashekara.. "Polyphosphate Kinase 2: A Novel Determinant of Stress Responses and Pathogenesis in Campylobacter jejuni.." PLoS One,. Vol. 5, no. 8. (August 2010.): PMID: 20808906-.

Xiulan Xu, Sally A. Miller, Fulya Baysal-Gurel, Karl-Heinz Gartemann, Rudolf Eichenlaub and Gireesh Rajashekara.. "Bioluminescent imaging of Clavibacter michiganensis subsp. michiganensis infection of tomato seeds and plants.." Appl Environ Microbiol.. Vol. 76, no. 12. (June 2010.): 3978-3988.

Fengjie Cui, Yebo Li, Zhe Liu, and Gireesh Rajashekara.. "Co-production of Lactic Acid and Lactobacillus rhamnosus Cells from Whey Permeate with Nutrient Supplements.." Food Bioprocess Technol.. Vol. 5, no. DOI 10.1007/s11947-010-0426-1. (September 2010.): pp 1278-1286.

Yasser M. Sanad, Issmat I. Kassem, Melanie Abley, Wondwossen Gebreyes, Jeffrey T. LeJeune, Gireesh Rajashekara*.. "Genotypic and Phenotypic Properties of Cattle-Associated Campylobacter and their Implications to Public Health in the USA." PLoS One. Vol. 10, no. 6. (October 2011.): e25778-.

Issmat I. Kassem, Qijing Zhang, Gireesh Rajashekara*. "The twin arginine translocation (Tat) system : Contributions to the pathobiology of Campylobacter jejuni." Future Microbiology. Vol. 11, no. 6. (November 2011.): 1315-1327.

Yasser Sanad, Issmat I. Kassem, Jun Lin, Jeffrey T. LeJeune, Gireesh Rajashekara.. "Occurrence of the invasion associated marker (iam) in Campylobacter jejuni isolated from cattle.." BMC Research Notes. Vol. 4, no. 1. (December 2011.): 570-.

Mary Drozd, Dharanesh Gangaiah, Zhe Liu, and Gireesh Rajashekara.. "Contribution of TAT system translocated PhoX to Campylobacter jejuni phosphate metabolism and resilience to environmental stresses." PLoS One. Vol. 10, no. 6. (October 2011.): e26336-.

Gourapura J. Renukaradhya, Cordelia Manickam, Mahesh Khatri, Xiangming Li, Moriya Tsuji, Gireesh Rajashekara, and Varun Dwivedi.. "Functional invariant NKT cells in pig lungs regulate the airway hyperreactivity: a potential animal model.." Journal of Clinical Immunology. Vol. 31, (November 2011.): 228-239.

Issmat I. Kassem, Gireesh Rajashekara. "An ancient molecule in a recalcitrant pathogen: the contributions of Inorganic polyphosphate (Poly-P) to the pathogenesis and stress responses of Campylobacter jejuni.." Future Microbiology. Vol. 10, no. 6. (October 2011.): 1117-1120.

Kassem II, Khatri M, Esseili MA, Sanad YM, Saif YM, Olson JW, Rajashekara G.. "Respiratory proteins contribute differentially to Campylobacter jejuni's survival and in vitro interaction with hosts' intestinal cells.." BMC Microbiol. Vol. 12, no. 1. (November 2012.): PMID: 23148765-.

1. Yasser M. Sanad, Gary Closs Jr, Anand Kumar, Jeffrey T. LeJeune, Gireesh Rajashekara.. "Molecular Epidemiology and Public Health Relevance of Campylobacter Isolated from Dairy Cattle and European Starlings in Ohio, USA." Foodborne Pathog Dis. 2012. Vol. 10, (December 2012.): PMID: 23259503-.

Xiulan Xu, Gireesh Rajashekara, Pierce A. Paul and Sally A. Miller.. "Colonization of Tomato Seedlings by Bioluminescent Clavibacter michiganensis subsp. michiganensis under Different Humidity Regimes.." Phytopathology. Vol. 2, no. 102. (February 2012.): 177-184.

Kassem II, Sanad YM, Stonerock R, Rajashekara G.. "An evaluation of the effect of sodium bisulfate as a feed additive on Salmonella enterica serotype Enteritidis in experimentally infected broilers.." Poultry Science. Vol. 4, (April 2012.): 1032-7.

Inventions and Patents

Rajashekara, G., V. Kapur and K. V. Nagaraja. "Application of recombinant fimbrial protein antigen for the diagnosis of Salmonella enteritidis infection in poultry." Filed January 1997.

Rajashekara, G., V. Kapur and K. V. Nagaraja. "Application of recombinant fimbrial protein antigen for the diagnosis of Salmonella enteritidis infection in poultry." Filed January 1997.

Gireesh Rajashekara and Gary Splitter. "Brucella melitensis mutants and methods." Filed October 2009.

Sally Ann Miller, Gireesh Rajashekara and Xiulan Xu. "Clavibacter Michiganensis Subsp. Michiganensis Bioluminescent mutants and application." Filed July 2009.

Presentations

"N. Weida, S. Grewal, Q. Zhang, J. Byeong Hwa, D. Gangaiah, G. Rajashekara. 2008. "TAT Protein Export Pathway inCampylobacter jejuni."." Presented at ASM 108th General Meeting. June 1Boston, Massachusetts, USA., Boston, MA, US|USA. (January 2007)

"Campylobacter Colonization in poultry." Presented at Campylobacter Colonization in poultry, San Antonio, TX, US|USA. (November 2007)

"Campylobacter: An underdog of foodborne pathogens." Presented at One Medicine conference, Columbus, OH, US|USA. (January 2008)

"Campylobacter jejuni Twin-Arginine Translocation System is Important for Chicken Colonization." Presented at NC1041 Enteric Diseases of Swine and Cattle: Prevention, Control and Food Safety, Chicago, IL, US|USA. (December 2008)

"Food Safety Research." Presented at S1033 Multi-State Food Safety Meeting Group, Baton Rouge, LA, US|USA. (November 2008)

"Protein translocation and Campylobacter jejuni colonization in chickens." Presented at CMIB annual retreat, Columbus, OH, US|USA. (January 2008)

"Protein translocation and Campylobacter jejuni colonization in chickens." Presented at The Food Science and Technology Department seminar series, . (January 2008)

"Dynamics of Campylobacter Colonization in Poultry." Presented at USDA-NRI project director’s meeting, . (January 2008)

"Dharanesh Gangaiah , Issmat I. Kassem, Byeonghwa Jeon, Zhe Liu, Qijing Zhang, and Gireesh Rajashekara. 2009."Polyphosphate Kinase 1 is Important for VBNC Formation, Natural Transformation and Antimicrobial Resistance inCampylobacter jejuni." September 2Toki Messe, Niigata, Japan.50% Authorship: Designed, directed the research and presented the data in an annual meeting.." Presented at 15th International workshop on Campylobacter, Helicobacter and Related Organisms., Nigaata, JP|JPN. (January 2009)

"Campylobacter Research." Presented at NC-1041 Enteric Diseases of Swine and Cattle: Prevention, Control and Food Safety, Chicago, IL. (December 2009)

"Campylobacter jejuni stress responses and in vivo colonization: Relevance to food safety.." Presented at International conference on Food, Environment, and Health, Xian, Shaanxi, CN|CHN. (June 2009)

"Survival of bioluminescent Campylobacter species in chicken litter." Presented at NRI/AFRI Project Directors’ (PD) Meeting, Chicago, IL. (July 2010)

"Campylobacter research update." Presented at S1033 Multi-State Project:Control of Foodborne Pathogens in Pre- and Post-Harvest Environments, Estes Park, CO. (October 2010)

"Upper Sugar Creek Watershed, Ohio: A Model Watershed for Study of Pathogen Origin, Fate and Transport." Presented at USDA NRI Water Quality Project Directors Meeting, St. Louis, MI. (January 2010)

"FAHRP Food Safety Research update." Presented at Ohio Farm Bureau Federation's AgriPOWER meeting, Wooster, OH. (February 2010)

"One Health." Presented at Ohio Farm Bureau Federation State Board of Trustees meeting, Wooster, OH. (June 2010)

"Polyphosphate kinase 2: a novel determinant of stress responses and pathogenesis in Campylobacter jejuni." Presented at NC1041 Enteric Diseases of Swine and Cattle; prevention, control and food safety, Chicago, IL. (December 2010)

"Lactogenic immunity/probiotics: Effect on neonatal gut immunitybased on preliminary studies." Presented at NCCAM Annual Stephen E. Straus Distinguished Lecture, Bethesda, MD, US|USA. (December 2010)

"Diagnostic Pathology of Brucellosis." Presented at International Congress on pathogens at human and animal interface (ICOPHAI), Addis Ababa, ET|ETH. (September 2011)

"Can we tackle Campylobacter? Novel approaches to control Campylobacter." Presented at 63rd North Central Avian Disease Conference, St. Paul,, Minnesota. (March 2012)

Technical Reports

Rajshekara, G., A. Back and K. V. Nagaraja. Discovery brings new hope for Salmonella control. St. Paul, MN: (January 1998).

Nagaraja, K. V., G. Rajashekara, A. Back, and D. A. Halvorson. Salmonella typhimurium vaccination for breeders. no. 55. Buffalo, MN: (January 1998).

Lydia Medeiros, Jeffery LeJeune, and Gireesh Rajashekara. A Serious Foodborne Illness for Everyone, Especially the Very Young and Very Old. Edited by Ohio State University Extension Fact Sheet. Columbus, OH, US|USA: Ohio State University Extension Fact Sheet. (January 2011).

Lydia C. Medeiros, Jeffery LeJeune and Gireesh Rajashekara. A Concern for Mom’s with Young Children and Other Young Adults. Columbus, OH, US|USA: Ohio State University Extension Fact Sheet. (January 2011).