Department of Pathobiological Sciences
- Professor in Clinical Diagnostics
- Section Chief of Diagnostic Microbiology
- BS, MS, PhD
Recombinant subunit and modified live vaccine; diagnostic reagent development; characterization and molecular subtyping of bacteria of medical importance; molecular mechanism of microbial pathogenesis; evolution and dissemination of drug resistance among bacterial pathogens.
Supervise the diagnostic bacteriology, mycology, parasitology, bacterial disease serology and part of diagnostic molecular microbiology laboratories that provide services to veterinary medical practioners, college and university researchers and valuable case material for teaching veterinary medical and graduate students. Participate in teaching veterinary bacteriology. Other activities include consultation with clinicians, students, private practitioners, and researchers; development of new tests; maintenance of quality control; and interpretation of diagnostic test results.
Brower, A., N. Lucero, O. Okwumabua, K. K. Gopaul, A. M. Whatmore, S. L. Cravero, and M. D. Trangoni. 2012. Newly Identified Variability in Brucella canis Fatty-Acid content is Associated with Geographic origin. Epidemiol. and Infect. (In Press).
Krugner-Higby, L., R. Brown, M. Rassette, M. Behr, O. Okwumabua, M. Cook, C. Bell, M. Flowers, J. Ntambi, and A. Gendron. 2012. Ulcerative Dermatitis in C57BL/6 Mice Lacking Stearoyl CoA Desaturase 1. Comp. Med. 62:1-7
Mikheil, D.M., D.C Shippy, N.M Eakley, O. Okwumabua, and A.A Fadl. 2012. Deletion of Gene Encoding Methyltransferase (gidB) Confers High-Level Antimicrobial Resistance in Salmonella. J of Antibiotics 65:185-192
Schmidt, S., M. O’Connor and O. Okwumabua. 2011. The Pathogenicity Island-Like DNA Segment Associated with Chinese Outbreak Strain of Streptococcus suis Serotype 2 is absent in the United States Isolates. Int. J. Mol Epidemiol. Genet. 2:56-60.
Okwumabua, O., Tou-Vou Moua, T. Danz, J. Quinn, M. O’Connor and S. Gibons-Burgener. 2010. Growth rate retardation and inhibitory effect of para-JEM Blue on Mycobacterium avium subspecies paratuberculosis. J. Vet. Diagn. Invest. 22: 734-737.
Okwumabua, O., E. Shull, T. Moua, T. Danz and K. Strelow. 2010. Comparison of three methods for extraction of Mycobacterium avium subspecies paratuberculosis DNA for polymerase chain reaction from broth-based culture systems. J. Vet. Diagn. Invest. 22: 67-69.
Kutz, R., and O. Okwumabua. 2008. Differentiation of Highly Virulent Strains of Streptococcus suis Serotype 2 According to Glutamate Dehydrogenase Electrophoretic and Sequence Type. J. Clin. Microbiol. 46:3201-3207.
Brower, A., O. Okwumabua, C. Massengill, Q. Muenk, P. Vanderloo, M. Duster, K. Homb, and K. Kurth. 2007. Investigation of the spread of Brucella canis via the U.S. interstate dog trade. Int. J. Infect. Dis. 11:454-458.
Okwumabua, O., M. O’Connor, E. Shull, K. Strelow, M. Hamacher, T. Kurzynski and D. Warshauer. 2005. Characterization of Listeria monocytogenes isolates from food animal clinical cases: PFGE pattern similarity to strains from human listeriosis cases. FEMS Microbiol. Lett. 249:275-281.
Okwumabua, O., S. Chinnapapakkagari. 2005. Identification of the gene encoding a 38-kilodalton immunogenic and protective antigen of Streptococcus suis. Clin. Dign. Lab. Immunol. 12:484-490.
Okwumabua, O., M. O’Oconnor, and E. Shull. 2003. A polymerase chain reaction (PCR) assay specific for Streptococcus suis based on the gene encoding the glutamate dehydrogenase. FEMS Microbiol. Lett. 218:79-84.
Okwumabua, O., J. Persaud and P. G. Reddy. 2001. Cloning and characterization of the gene encoding the glutamate dehydrogenase of Streptococcus suis serotype 2. Clin. Diagn. Lab. Immunol. 8:251-257.
Okwumabua, O., F. Goodman, and O. Elfassy. 2000. Evaluation of in vitro activity of two topical products against three organisms isolated from canine referral patients with otitis externa and cutaneous pyoderma. Vet. Therapeutics 1(4):261-263.
Okwumabua, O., O. Abdelmagid, and M. M. Chengappa. 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. Lett. 181:113-121.
Abdelmagid, O. Y., M. M. Mansour, O. Okwumabua, and S. van Drunen Littel-van den Iiurk. 1998. Expression and Cellular Distribution of Baculovirus-expressed Bovine Herpesvirus-1 Glycoprotein D sequences. Arch. Virol. 143:2173-2187.