Administration I serve as a liaison between Department faculty and staff and the Dean. I consult with faculty and staff on a regular basis and represent the department in the Administrative Council. Major administrative duties include the following: Guidance of all professional activities of the faculty, staff, residents and graduate students of the Department; development and implementation of Departmental policies and procedures as required by the College and the University; promotion and development of independent or collaborative research, teaching and service programs; preparation of an annual budget in consultation with Chief Financial Officer, Business Office and faculty for the Department; fiscal management and accountability of the Department; preparation of annual reports summarizing all activities of the Department; conducting regular faculty and staff meetings to facilitate faculty and staff input on various issues, and to establish better communications at all levels; performance evaluation of faculty and staff; recruitment of faculty, staff and residents to the Department; preparation of documents for tenure and/or promotion of faculty and staff; maintain Departmental inventory of equipment and space; and providing and creating opportunities for faculty and staff growth and development. Research My primary research interests are to study and understand the pathogenesis of important infectious diseases of animals, and to develop strategies to protect animals from these diseases. Identification, molecular characterization and functional analysis of antigen/toxins of Streptococcus suis, Mannheimia haemolytica, and Fusobacterium necrophorum are my primary research focuses. Teaching I coordinate and teach a portion of the professional Veterinary Bacteriology and Mycology course to sophomore veterinary students. This is a 4 credit hour lecture and laboratory course. The course is designed to provide the latest information on all facts of the microbial pathogens of animals of veterinary interest. Service I supervise the diagnostic bacteriology and mycology laboratories that provide services to the Veterinary Teaching Hospital, college and university researchers, private practitioners, veterinary biological industries, other colleges of veterinary medicine, and researchers from other institutions. These laboratories also provide valuable case material for teaching veterinary and graduate students. My activities include consultation with clinicians, students, private practitioners, and researchers; development of new tests; maintenance of quality control; and interpretation of results. Selected Publications Nagaraja, T.G., Narayanan, S.K., Stewart, G.C., and Chengappa, M.M. 2005. Fusobacterium necrophorum Infections in Animals: Pathogenesis and Pathogenic Mechanisms. Anaerobe, 11:239-246. Harkin, K.R., Roshto, Y.M., Sullivan, J.T., Purvis, T.J., and Chengappa, M.M. 2003. Comparison of Polymerase Chain Reaction assay, Bacteriologic Culture, and Serologic Testing in Assessment of Prevalence of Urinary Shedding of Leptospires in Dogs. JAVMA, 222:1230-1233. Staats, JJ, MM Chengappa, MC DeBey, B Fickbohm, RD Oberst. 2003. Detection of Escherichia coli Shiga toxin (stx) and enterotoxin (estA and elt) genes in fecal samples from non-diarrheic and diarrheic greyhounds. Vet. Microbiol. 94:303-312. Reddy, J.R., Kwang, J., Lechtenberg, K.F., Khan, N.C., Reddy, B.P., and Chengappa, M.M. 2002. An Immunochromatographic Serological Assay for the Diagnosis of Mycobacterium tuberculosis. Comp. Immunol. Microbiol. and Inf. Dis., 25:21-27. McVey, D.S., Chengappa, M.M., Mosier, D.E., Stone, G.G., Oberst, R.D., Sylte, M.J., Gabbert, N.M., Kelly-Aehle, S., and Curtis III, R. 2002. Immunogenicity of Avirulent Salmonella typhmunium in Dogs. Vaccine, 20:1618-1623. Narayanan, S.K., Stewart, G., Chengappa, M.M., Willard, L., Shuman, W., Wilkerson, M., and Nagaraja, T.G. 2002. Fusobacterium necrophorum Leukotoxin Induces Activation and Apoptosis of Bovine Leukocytes. Inf. and Immunity, 70:4609-4620. Narayanan, S.K., Nagaraja, T.G., Chengappa, M.M., and Stewart, G. 2001. Cloning, Sequencing and Expression of the Leukotoxin Gene from Fusobacterium necrophorum. Inf. and Immunity, 69:5447-5455. Narayanan, S. K., T. G. Nagaraja, M. M. Chengappa, G. C. Stewart. 2001. Electrophoretic mobility anomalies associated with PCR amplification of the intergenic spacer region between 16S and 23S ribosomal RNA genes of Fusobacterium necrophorum. J. Microbiol. Meth. 46:165-169. Narayanan, S. K., T. G. Nagaraja, M. M. Chengappa, and G. C. Stewart. 2001. Leukotoxins of gram-negative bacteria. Vet. Microbiol. 2248: 1-20. Mechor, G.D., DeRosa, D., Staats, J.J. Chengappa, M.M., and Shryock, T.R. 2000. Relationship of Pasteurella spp. Isolated from Paired Nasal and Transtracheal Swabs from Calves with Clinical Signs of Bovine Respiratory Disease. J. Clin. Microbiol. 38:327-332. Basaraba, R.J., Byerly, A.N., Mosier, D.A., Butine, M.D., Stewart, G.C., Fenwick, B.W., Chengappa, M.M., and Highlander, S.K. 1999. Actin Polymerization Enhances Pasteurella haemolytica Leukotoxicity. Vet. Microbiol. 64:307-321. Nagaraja, T.G., Beharka, A.B., Tan, Z.L., Chengappa, M.M., Carroll, L.H., Raun, A.P., Laudert, S.B., and Parrott, J.C. 1999. Bacterial Flora of Liver Abscesses in Feedlot Cattle Fed Tylosin or No Tylosin. J. Anim. Sci. 77:973-978. Staats, J.J., Plattner, B.L., Stewart, G.C., and Chengappa, M.M. 1999. Presence of the Streptococcus suis Suilysin Gene and Expression of MRP and EF Correlates with High Virulence in Streptococcus suis Type 2 Isolates. Vet. Microbiol., 70:201-211. Okwumabua, O., Abdelmagid, O., and Chengappa, M.M. 1999. Hybridization Analysis of the Gene Encoding a Hemolysin (suilysin) of Streptococcus suis Type 2: Evidence for the Absence of the Gene in Some Isolates FEMS Microbiol. Let. 181:113-121. 1995. Carter G R, Chengappa, M.M, and Roberts A W. Essentials of Veterinary Microbiology. 5th Ed., Williams and Wilkins. 1993. Carter G R and
Chengappa, M.M. Microbial Diseases: A
Veterinarian’s Guide to Laboratory Diagnosis. Iowa State University
Press.
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