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Department of Infectious Diseases

John J. Maurer

John J. Maurer

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Educational Background

  • BS (1984), Microbiology, Purdue University
  • PhD (1990), Microbiology, University of Texas Health Science Center at San Antonio

Teaching Experience

​Also appointed to:

  • Department of Medical Microbiology and Parasitology, 1996-present
  • Center for food Safety and Quality Enhancement, 2001-present
  • Department of Microbiology

Research Interests

  • ​Microbial interactions involved in colonization of food animals by foodborne pathogens and the interplay required for gene transfer of resistance or virulence genes from the microflora to pathogens in the animal host.
  • Development, validation and implementation of molecular tools into on-farm surveillance program for foodborne pathogens.
  • Ecology of antibiotic resistance and foodborne pathoens in the food production environment.
  • Salmonella and niche adaptation.


  • Pfizer Award for Research Excellence, 2000
  • John Bowen Award for Excellence in Research, 2001
  • Steering Committee, (American Academy of Microbiology) for Colloquium on: “The role of antimicrobials in agriculture: a critical assessment.” 2001
  • American Association of Avian Pathologists, 1999-present
  • American Society for Microbiology, 1985-present
  • Southeastern Branch ASM, President-Elect 2002-2003
  • Southeastern Branch ASM, President 2003-2004
  • Ivan Roth Award for Service to the Southeastern Branch ASM, 2005
  • Center for Undergraduate Research Opportunities, Undergraduate Research Mentor Award, 2008
  • Institute of Medicine (IOM) Committee on Review of the Use of Process Control Indicators in FSIS Public Health Risk-Based Inspection System, 2008-2009
  • IOM Standing Committee for USDA FSIS, 2010-2011
  • University of Georgia CURO Council, 2010-

Selected Publications

  • Pedroso, A. A., A. L. Hurley-Bacon, A. S. Zedek, T. W. Kwan, A. P. O. Jordan, G. Avellaneda, C. L. Hofacre, B. B. Oakley, S. R. Collett, J. J. Maurer, and M. D. Lee. 2013. Can probiotics improve the environmental microbiome and resistome of commercial poultry production? Inter. J. Environ. Res. Pub. Hlth. 10:4534-4559.
  • Minicozzi, J., S. Sanchez, M. Lee, P. Holt, C. Hofacre, and J. Maurer. 2013. Development of recombinant flagellar antigens for serological detection of Salmonella enterica serotypes Enteritidis, Hadar, Heidelberg, and Typhimurium in poultry. Agriculture 3: 381-397.
  • Hernandez, S. M., K. Keel, S. Sanchez, E. Trees, P. Gerner-Smidt, J. K. Adams, Y. Cheng. A. Ray III, G. Martin, A. Presotto, M. G. Ruder, J. Brown, D. S. Blehert, W. Cottrell, and J. J. Maurer. 2012. The epidemiology of Salmonella enterica spp. enterica serovar Typhimurium strain associated with a songbird outbreak. Appl. Environ. Microbiol. 78:7290-7298. (PMID: 22885752).
  • Berghaus, R. D., D. L. Mathis, R. K Bramwell, K. S. Macklin, J. L. Wilson, M. J. Wineland, J. J. Maurer, and M. D. Lee. 2012. Multi-level analysis of environmental Salmonella prevalences and management practices on 49 broiler breeder farms in four southeastern states, U.S.A. Zoonoses Public Health 59:365-374. (PMID: 22650982).
  • Cox, N. A., L. J. Richardson, J. J. Maurer, M. E. Berrang, P. J. Fedorka-Cray, R. J. Buhr, J. A. Byrd, M. D. Lee, C. L. Hofacre, P. M. O’Kane, A. M. Lammerding, A. G. Clark, S. G. Thayer, and M. P. Doyle. 2012. Evidence for horizontal and vertical transmission in Campylobacter passage from hen to her progeny. J. Food Prot. 75:1896-1902. (PMID: 23043845)
  • Pedroso, A. A., Y. Cheng, J. Maurer, and M. D. Lee. 2012. Remodeling the intestinal ecosystem toward better performance and intestinal health. J. Appl. Poult. Res. 21:432-443.
  • R. D. Berghaus, D. L. Mathis, R. K. Bramwell, K. S. Macklin, J. L. Wilson, M. J. Wineland, J. J. Maurer, M. D. Lee. Multilevel Analysis of Environmental Salmonella Prevalences and Management Practices on 49 Broiler Breeder Farms in Four South-Eastern States, USA. Zoonoses and Public Health. Epub 20 FEB 2012. DOI: 10.1111/j.1863-2378.2012.01464.x
  • Mathis, D. L., R. D. Berghaus, M. D. Lee, and J. J. Maurer. Variation in Salmonella Enteritidis RAPD-PCR patterns may not be due to genetic differences. Avian Dis. 55(4):620-625. 2011.
  • Maurer, J. J., M. D. Lee, Y. Cheng, and A. Pedroso. An Allelotyping PCR for identifying Salmonella enterica serovars Enteritidis, Hadar, Heidelberg, and Typhimurium. JoVE. (53):3130( 2011.
  • Berghaus, R. D., S. G. Thayer, J. J. Maurer, and C. L. Hofacre. Effect of vaccinating breeder chickens with a killed Salmonella vaccine on Salmonella prevalences and loads in breeder and broiler chicken flocks. J. Food Prot. 74:727-734. 2011.
  • Maurer, J. J. Rapid detection and limitation of molecular techniques. Ann. Rev. Food Sci. Tech. 2:259-279. 2011.
  • Dorea, F., D. J. Cole, C. Hofacre, K Zamperini, D. Mathis, M. P. Doyle, M. D. Lee, and J. J. Maurer. Effect of Salmonella vaccination of chicken breeders on reducing carcass contamination of broiler chickens in commercial poultry operations. Appl. Environ. Microbiol. 76:7820-7825. 2010.
  • Soyer, Y., A. Moreno Switt, M.A. Davis, J. Maurer, P.L. McDonough, D. J. Schoonmaker-Bopp, N. B. Dumas, T. Root, L.D. Warnick, Y.T. Gröhn and M. Wiedmann.Salmonella 4,5,12:i:-: an emerging Salmonella serotype that represents multiple distinct clones. J. Clin. Microbiol. 47:3546-3556. 2009.
  • Hong, Y., T. Liu1, M. D. Lee, C. L. Hofacre, M. Maier, D. G. White, S. Ayers, L. Wang, R. Berghaus, and J. Maurer. A rapid screen of broth enrichments for Salmonella enterica serovars Enteritidis, Hadar, Heidelberg, and Typhimurium using an allelotyping multiplex PCR that targets O and H antigen alleles. J. Food Prot. 72:2198-2201. 2009.
  • Hurley, A., J. J. Maurer, and M. D. Lee. Using bacteriophage to modulate Salmonella colonization of the chicken’s gastrointestinal tract: lessons learned from in silico and in vivo modeling. Avian Dis. 52:599-607. 2008.
  • Hong, Y., T. Liu, M. D Lee, C. L Hofacre, M. Maier, D. G White, S. Ayers, L. Wang, R. Berghaus and J. J Maurer. Rapid screening of Salmonella enterica serovars Enteritidis, Hadar, Heidelberg and Typhimurium using a serologically-correlative allelotyping PCR targeting the O and H antigen alleles. BMC Microbiol. ( 2008.
  • Simjee, S., P. F. McDermott, D. G. White, C. Hofacre, R. D. Berghaus, P. J. Carter, L. Stewart, T. Liu, M. Maier, and J. J. Maurer. Antimicrobial susceptibility and distribution of antimicrobial resistance genes among Enterococcus and coagulase-negative Staphylococcus isolates recovered from poultry litter. Avian Dis. 51:884-892. 2007.
  • Maurer, J. J. The proper conduct of research. Avian Dis. 51:1-7. 2007.
  • D’Aoust, J., and J. J. Maurer. Salmonella Species. p.187-236. In M. P. Doyle, L. R. Beuchat, and T. J. Montville Eds., Food Microbiology: Fundamentals and Frontiers, 3rd Edition. ASM Press, Washington D.C. 2007.
  • Zamperini, K., V. Soni, D. Waltman, S. Sanchez, E. C. Theriault, J. Bray, and J. J. Maurer. Molecular characterization reveals Salmonella enterica serovar 4,[5],12:i:- from poultry is a variant Typhimurium serovar. Avian Dis. 51:958-964. 2007.
  • Smith, J. L., D. J. Drum†, Y. Dai, J. M. Kim, S. Sanchez, J. J. Maurer, C. L. Hofacre, and M. D. Lee. Impact of antimicrobial usage on antimicrobial resistance in commensal Escherichia coli colonizing broiler chickens. Appl. Environ. Microbiol. 73:1404-1414. 2007.
  • LeClair, G. R., A. Buchan, J. Maurer, M. A. Moran, and J. T. Hollibaugh. Comparisons of chitinolytic enzyme from an estuary and an alkaline, hypersaline lake. Eviron. Microbiol. 9:197-205. 2007.
  • Lee, M.D., J. Lu, B. Harmon, C.L. Hofacre, and J.J. Maurer. Molecular basis for AGP effects in poultry. In: Antimicrobial growth promoters Where do we go from here? D. Barug, J. de Jong, A.K. Kies, and M.W.A. Verstegne, eds., Wageningen Academic Publishers, The Netherlands. pp. 149-164. 2006.
  • Fairchild, A., M. D. Lee, and J. J. Maurer. PCR basics. p. 1-25. PCR Methods in Foods, John Maurer, Ed., Springer, New York, N.Y. 2006.
  • Maurer, J. J. The mythology of PCR: a warning to the wise. p. 27-40. PCR Methods in Foods, John Maurer, Ed., Springer, New York, N.Y. 2006.
  • Idris, Umelaalim, J. Lu, M. Maier, S. Sanchez, C.L. Hofacre, B.G. Harmon, J.J. Maurer, and M.D. Lee. Dissemination of fluoroquinolone-resistant Campylobacter within an integrated commercial poultry production system. Appl. Environ. Microbiol. 72:3441-3447. 2006.
  • Maurer, J. J. and M. D. Lee. Salmonella: virulence, stress response, and resistance. p.215-239. In Mansel Griffiths Ed., Understanding Pathogen Behavior: Virulence, Stress Response and Resistance, CRC Press, Boca Raton, FL, and Woodhead Publishing Limited, Cambridge, United Kingdom. 2005.
  • Lee, M. D., and J. J. Maurer. Colibacillosis. P. 2221-2222. In C. M. Kahn, Ed., The Merck Veterinary Manual, 9th Edition, National Publishing Inc., Philadelphia, PA. 2005.
  • Cole, D., D. J. V. Drum, D. E. Stallknecht, D. G. White, M. D. Lee, S. Ayers, M. Sobsey, and J. J. Maurer. Free-ranging Canada geese as environmental vectors of antimicrobial resistance. Emerg. Infect. Dis. 11:935-938. 2005.
  • Ward, M. P., T. H. Brady, L. L. Couëtil, K. Liljebjelke, J. J. Maurer, and C. C. Wu. Investigation and control of an outbreak of salmonellosis caused by multidrug-resistant Salmonella Typhimurium in a population of hospitalized horses. Vet. Microbiol. 107:233-240. 2005.
  • S. Zhao, J. J. Maurer, S. Hubert, J. F. De Villena, P. F. McDermott, J. Meng, S. Ayers, L. English, and D. G. White. Antimicrobial susceptibility and molecular characterization of avian pathogenic Escherichia coli isolates. Vet. Microbiol. 107:215-224. 2005.
  • Liljebjelke, K. A., C. L. Hofacre, T. Liu, D. G. White, S. Ayers, S. Young, and J. J. Maurer. Vertical and horizontal transmission of Salmonella within integrated broiler production system. Foodborne Path. Dis. 2(1):90-102. 2005.
  • Morales C., M. D. Lee, C. Hofacre, and J. J. Maurer. Detection of a novel virulence gene and a Salmonella virulence homologue among Escherichia coli isolated from broiler chickens. Foodborne Path. Dis. 1(3):160-165. 2004.
  • Hurd, H. S., S. Doores, D. Hayes, A. Mathew, J. Maurer, P. Silley, R. S. Singer, and R. N. Jones. 2004. Public health consequences of macrolide use in food animals: a deterministic risk assessment. J. Food Prot. 67:980–992.
  • Nandi, S., J. J. Maurer, C. Hofacre, and A. O. Summers. 2004. Gram-positive bacteria are a major reservoir of class 1 antibiotic resistance integrons in poultry litter. Proc. Natl. Acad. Sci. USA. 101:7118-7122.
  • Lu, J., U. Idris, B. Harmon, C. Hofacre, J. J. Maurer, and M. D. Lee. Diversity and succession of the intestinal bacterial community of the maturing broiler chicken. Appl. Environ. Microbiol. 69(11): 6816-6824. 2003.
  • Gibbs, P. S., J. J. Maurer, L. K. Nolan, and R. E. Wooley. Prediction of chicken embryo lethality with the avian Escherichia coli traits complement resistance, colicin V production, and presence of the increased serum survival gene cluster (iss). Avian Dis. 47:370-379. 2003.
  • Hong, Y., T. Liu, C. Hofacre, M. Maier, S. Ayers, D. G. White, L. Wang, and J. J. Maurer. A restriction fragment length polymorphism based polymerase chain reaction as an alternative to serotyping for identifying Salmonella serotypes. Avian Dis. 47:387-395. 2003.
  • Hong, Y., M. Berrang, T. Liu, C. Hofacre, S. Sanchez, L. Wang, and J. J. Maurer. Rapid detection of Campylobacter coli, C. jejuni and Salmonella enterica on poultry carcasses using PCR-enzyme-linked immunosorbent assay. Appl. Environ. Microbiol. 69:3492-3499. 2003.
  • White, D. G., S. Ayers, J. J. Maurer, S. G. Thayer and C. Hofacre. Antimicrobial susceptibilities of Staphylococcus aureus isolated from commercial broilers in northeast Georgia. Avian Dis. 47:203-210. 2003.
  • Lu, J., S. Sanchez, M. D. Lee, C. Hofacre, B. G. Harmon, and J. J. Maurer. 2003. Evaluation of broiler litter with reference to the microbial composition as assessed using 16S rDNA and functional gene markers. Appl. Environ. Microbiol. 69:901-908.
  • Hofacre, C., M. Lee and J. Maurer. 2003. Enhancing gut microflora. Poult. Dig. (Online)Vol. 3(1):1-3.
  • Keyes, K., M. D. Lee, and J. J. Maurer. Antibiotics: mode of action, mechanism of resistance and transfer. P. 45-56. In M. Torrence and R. Isaacson Eds., Current Topics in Food Safety in Animal Agriculture, Iowa State University Press, Ames, IA. 2003.
  • Sanchez, S., M. A. McCrackin Stevenson, C. R. Hudson, M. Maier, T. Buffington, Q. Dam, and J. J. Maurer. Characterization of multi-drug resistant Escherichia coli associated with nosocomial infections in dogs. J. Clin. Microbiol. 40:3586-3595. 2002.
  • Sanchez, S., M. D. Lee, B. G. Harmon, J. J. Maurer, and M. P. Doyle. Animal issues associated with Escherichia coli O157:H7. J. Am. Vet. Assoc. 221:1122-1126. 2002.
  • Sanchez, S., C. L. Hofacre, M. D. Lee, J. J. Maurer, and M. P. Doyle. Animals sources of human salmonellosis. J. Am. Vet. Assoc. 221:492-497. 2002.
  • Maurer, J. J., C. L. Hofacre, R. E. Wooley, P. Gibbs, and R. Froyman. Virulence factors associated with Escherichia coli present in a commercially produced competitive exclusion product. Avian Dis. 46:704-707. 2002.
  • Liu, T., K. Liljebjelke, E. Bartlett, C. L. Hofacre, S. Sanchez, and J. J. Maurer. Application of nested PCR to detection of Salmonella in poultry environments. J. Food Prot.65:1227-1232. 2002.
  • Mizan, S., M. D. Lee, B. G. Harmon, S. Tkalcic, and J. J. Maurer. Acquisition of antibiotic resistance plasmids by enterohemorrhagic Escherichia coli O157:H7 within ex vivo rumen. J. Food Prot. 65:1038-1040. 2002.
  • Hazariwala, A., Q. Sanders, C. R. Hudson, C. L. Hofacre, S. G. Thayer, and J. J. Maurer. Distribution of staphylococcal enterotoxin genes among Staphylococcus aureus isolated from poultry and humans. Avian Dis. 46:132-136. 2002.
  • Bischoff, K. M., D. G. White, P. F. McDermott, S. Zhao, S. Gaines, J. J. Maurer, and David J. Nisbet. Characterization of chloramphenicol resistance in ?-hemolytic Escherichia coli associated with diarrhea in neonatal swine. J. Clin. Microbiol. 40:389-394. 2002.
  • Zhao, S., D. G. White, P.F. McDermott, S. Friedman, L. English, S. Ayers, J. Meng, J. J Maurer, R. Holland and R. D. Walker. Identification and expression of cephamycinase blaCMY genes in Escherichia coli and Salmonella isolated from animals and food. Antimicrob. Agents Chemotherap. 45:3647-3650. 2001.
  • Hofacre, C. L., D. G. White, J. J. Maurer, C. Morales, C. Lobsinger, C. R. Hudson and S. G. Thayer. Antibiotic resistant bacteria in rendered animal products. Avian Dis. 45:953-961. 2001.
  • Hudson, C. R., M. Garcia, R. K. Gast, and J. J. Maurer. Determination of close genetic relatedness of the major Salmonella enteritidis phage types by pulsed-field gel electrophoresis and DNA sequence analysis of several Salmonella virulence genes. Avian Dis. 45: 875-886. 2001.
  • Sander, J., C. R. Hudson, L. Dufour-Zavala, W. D. Waltman, C. Lobsinger, S. G. Thayer, R. Otalora, and J. J. Maurer. Dynamics of Salmonella contamination in a commercial quail operation. Avian Dis. 45:1044-1049. 2001.
  • Goldstein, C., M. D. Lee, S. Sanchez, C. R. Hudson, B. Phillips, B. Register, M. Grady, C. Liebert, A. O. Summers, D. G. White, and J. J. Maurer. Incidence of class 1 and 2 integrases in clinical and normal flora bacteria from livestock, companion animals, and exotics. Antimicrob. Agents Chemother. 45:723-726. 2001.
  • D’Aoust, J., J. J. Maurer, and J. S. Bailey. Salmonella Species. p. 141-178. In M. P. Doyle, L. R. Beuchat, and T. J. Montville Eds., Food Microbiology: Fundamentals and Frontiers, 2nd Edition. ASM Press, Washington D.C. 2001.
  • Lee, M. D. and J. J. Maurer. Genetic basis of antimicrobial resistance in veterinary pathogens. Ann. NY Acad. Sci. 916:643-645. 2000.
  • White, D. G., C. R. Hudson, J. J. Maurer, S. Ayers, S. Zhao, M. D. Lee, L. F. Bolton, T. Foley, and J. Sherwood. Characterization of chloramphenicol and florfenicol resistance in bovine pathogenic Escherichia coli. J. Clin. Microbiol. 38:4593-4598. 2000.
  • Wooley, R. E., J. E. Sander, and J. J. Maurer. In vitro effect of EDTA-Tris and EDTA-Tris-SDS on hatchery disinfectants. Avian Dis. 44: 901-906. 2000.
  • Hofacre, C. L., A. R. ‘de Cotret, J. J. Maurer, A. Garrity, and S. G. Thayer. Presence of fluoroquinolone resistant coliforms in poultry litter. Avian Dis. 44: 963-967. 2000.
  • White, D. G., L. J. V. Piddock, J. J. Maurer, Shaohua Zhao, Vito Ricci and S. G. Thayer. Characterization of fluoroquinolone resistance in veterinary isolates of avian Escherichia coli and cross-resistance to human fluoroquinolones. Antimicrob. Agents Chemother. 44:2897-2899. 2000.
  • Maurer, J. J., T. A. Doggett, L. Burns-Keliher, and R. Curtiss III. Expression of the rfa, LPS biosynthesis promoter in Salmonella typhimurium during invasion of intestinal epithelial cells. Cur. Microbiol. 41:172-176. 2000.
  • Wooley, R. E., P. S. Gibbs, T. P. Brown, and J. J. Maurer. Chicken embryo lethality assay for determining the virulence of avian Escherichia coli isolates. Avian Dis. 44:318-324. 2000.
  • Hudson, C. R., C. Quist, M. D. Lee, K. Keyes, S. V. Dodson, C. Morales, S. Sanchez, D. G. White and J. J. Maurer. The genetic-relatedness of Salmonella from non-domestic birds in the Southeastern United States. J. Clin. Microbiol. 38:1860-1865. 2000.
  • Lee, M. D., F. T. Burch, J. J. Maurer, A. Henk, and S. G. Thayer. DNA fingerprinting of plasmid-containing serotype A:3,4 Pasteurella multocida isolated from cases of fowl cholera in chickens and turkeys. Avian Dis. 44:201-204. 2000.
  • Keyes, K., C. Hudson, J. J. Maurer, S. G. Thayer, D. G. White, and M. D. Lee. Detection of florfenicol resistance genes in Escherichia coli isolated from sick chickens. Antimicrob. Agents Chemother. 44:421-424. 2000.
  • Dodson, S. V., J. J. Maurer, P. S. Holt, and M. D. Lee. Temporal changes in the population genetics of Salmonella pullorum. Avian Dis. 43:685-695. 1999.
  • Bass, L., C. A. Liebert, M. D. Lee, D. G. White, A. O. Summers, S. G. Thayer, and J. J. Maurer. The incidence and characterization of integrons, genetic elements associated with multiple drug resistance, in avian Escherichia coli. Antimicrob. Agents Chemother. 43:2925-2929. 1999.
  • Dodson, S. V., J. J. Maurer, and E. B. Shotts. Biochemical and molecular typing of Streptococcus iniae isolated from fish and human cases. J. Fish Dis. 22:331-336. 1999.
  • Maurer, J. J., D. Schmidt, P. Petrosko, S. Sanchez, L. F. Bolton, and M. D. Lee. Development of primers to O-antigen biosynthesis genes for specific detection of Escherichia coli O157 by PCR. Appl. Enivron. Microbiol. 65:2954-2960. 1999.
  • Bolton, L. F., L. Kelly, M. D. Lee, P. F. Cray, and J. J. Maurer. Detection of multidrug-resistant Salmonella enterica serotype typhimurium DT104 based on a gene which confers cross-resistance to florfenicol and chloramphenicol. J. Clin. Microbiol. 37:1348-1351. 1999.
  • Reingold, J., N. Starr, J. J. Maurer, and M. D. Lee. 1999. Identification of a new Escherichia coli She haemolysin homolog in avian E. coli. Vet. Microbiol. 66:125-134
  • Maurer, J. J., M. D. Lee, C. Lobsinger, T. P. Brown, M. Mize, and S. G. Thayer. Molecular typing of avian Escherichia coli isolates by random amplification of polymorphic DNA. Avian Dis. 42:431-451. 1998.
  • Wooley, R. E., P. S. Gibbs, T. P. Brown, J. R. Glisson, W. L. Steffens, and J. J. Maurer. Colonization of the chicken trachea by an avirulent avian Escherichia coli transformed with plasmid pHK11. Avian Dis. 42:194-198. 1998.
  • Maurer, J. J., T. P. Brown, W. L. Steffens, and S. G. Thayer. The occurrence of ambient temperature-regulated adhesins, curli, and the temperature-sensitive hemagglutinin Tsh among avian Escherichia coli. Avian Dis. 42:106-118. 1998.
  • Maurer, J. J., and S. J. Mattingly. Molecular analysis of lipoteichoic acid from Streptococcus agalactiae. J. Bacteriol. 173:487-494. 1991.
  • Mattingly, S. J., J. J. Maurer, E. K. Eskew, and F. Cox. Identification of a high-virulence clone of serotype III Streptococcus agalactiae by growth characteristics at 40 degrees C. J. Clin. Microbiol. 28:1676-1677. 1990.
  • Maurer, J. J., and S. J. Mattingly. In vitro method to differentiate isolates of type III Streptococcus agalactiae from symptomatic and asymptomatic patients. J. Clin. Microbiol. 26:686-681. 1988.

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