Professor Darren Trott

Professor Darren Trott
 Position Professor of Veterinary Microbiology
 Org Unit School of Animal and Veterinary Science
 Telephone +61 8 8521 2989
 Location Floor/Room G 03 ,  Leske Building ,   Roseworthy
  • Biography/ Background

    I completed my veterinary degree at Murdoch University and worked in small animal practice for eight years. Following an honours project on Listeria monocytogenes I became interested in the ecology of infectious diseases and completed a PhD with Prof David Hampson on intestinal spirochaetes (awarded in 1998). After completing a three year post-doc at the National Animal Disease Center in Ames, Iowa, USA, I accepted a lectureship at The University of Queensland (UQ) School of Veterinary Science in 2000. I taught veterinary microbiology to veterinary undergraduates at UQ for 10 years and conducted research on gastrointestinal diseases, microbial ecology and virulence/antimicrobial resistance in companion animal, livestock and human bacterial pathogens. I joined The University of Adelaide School of Animal and Veterinary Sciences in January 2010 and my research areas have expanded to also include the development of new antimicrobials for superbug infections.

  • Qualifications

    BSc (Hon) (1991)

    BVMS (Hon) (1990)

    PhD (1998)

  • Teaching Interests

    Veterinary bacteriology and mycology

    Antimicrobial chemotherapy, antimicrobial stewardship and prudent use guidelines, infection control and mitigation of resistance

    Veterinary diagnostic microbiology

  • Research Interests

    1) Antimicrobial resistance and virulence in zooanthroponotic bacterial pathogens (extraintestinal pathogenic E. coli, Salmonella, MRSA and MRSP)

    2) New antimicrobial agents for superbug infections

    3) Infectious diseases and gastrointestinal microbial ecology in iconic Australian wildlife (koalas)

    4) Contract research for pharmaceutical companies (antimicrobial susceptibility testing for APVMA registration of new drugs , characterization of new antimicrobial agents, animal models of bacterial disease)

  • Publications


    1. Litster, A, Moss, SM, Honnery, M, Rees, R and DJ Trott (2007) Prevalence of bacterial species in cats with clinical signs of lower urinary tract disease: Recognition of Staphylococcus felis as a possible feline urinary tract pathogen.  Vet. Microbiol. 121, 182-8.

    2. Wu X-Y, Chapman TA, Trott DJ, Bettelheim KA, Do TN, Driesen S, Walker MJ and JC Chin (2007) Comparative analysis of virulence genes, genetic diversity and phylogeny between commensal and enterotoxigenic Escherichia coli from weaned pigs. Appl. Environ. Microbiol. 73, 83-91.

    3. Sidjabat, HE, Hanson ND, Smith-Molland, E, Bell, J, Gibson, J, Filippich, L and DJ Trott (2007) Identification of plasmid mediated ESBL and AmpC β-lactamases and other associated resistance genes in Enterobacter cloacae isolated from dogs. J. Med. Microbiol. 56, 426-434.

    4. Milinovich, GJ, Trott, DJ, Burrell, PC, Croser, EM, Al Jassim, RAM, Morton, JM, van Eps, AN and CC Pollitt (2007) Fluorescence in situ hybridization analysis of hindgut bacteria associated with the development of equine laminitis. Environ. Microbiol. 9, 2090-2100.

    5. Litster, A, Moss, SM, Honnery, M, Rees, B Edingloh, M and DJ Trott (2007) Clinical efficacy and palatability of pradofloxacin 2.5% oral suspension for the treatment of bacterial lower urinary tract infections in cats. J. Vet. Intern. Med. 21, 990-995.

    6. Mizuno, T, Ploeg R and DJ Trott (2007) A new concept to stimulate mucosal as well as systemic immunity by parenteral vaccination as applied to the development of a live attenuated Salmonella enterica serovar Dublin vaccine Vet. Res. 38, 773-794.

    7. Trott, DJ, Moss, SM, See, A and RA Rees (2007) Evaluation of disc diffusion and MIC testing for determining susceptibility of Pseudomonas aeruginosa isolates to topical enrofloxacin/silver sulfadiazine. Aust. Vet. J. 85, 464-466.

    8. Milinovich, GJ, Burrell, PC, Pollitt, CC and Trott, DJ (2008) Streptococcus henryi sp. nov. and Streptococcus cabalis sp. nov.: Two novel streptococci isolated from horses with oligofructose induced laminitis. Int. J. Syst. Evol. Microbiol. 58, 262-268.

    9. Mizuno, T, McLennan, M and DJ Trott (2008) Intramuscular vaccination of young calves with a Salmonella Dublin metabolic-drift mutant provides superior protection to oral delivery. Vet. Res. 39, 26.

    10. Mikkelsen, D, Milinovich, G, Burrell, P, Huynh S, Pettett, L, Blackall, LL, Trott, DJ and PS Bird (2008) Phylogenetic analysis of Porphyromonas species isolated from the oral cavity of Australian marsupials. Environ. Microbiol. 10, 2425-2432.

    11. Symonds, EP, Trott, DJ, Bird, PS and P Mills (2008) Growth characteristics and enzyme activity in Batrachochytrium dendrobatidis isolates. Mycologia 116, 143-147.

    12. Gibson, JS, Morton, JM, Cobbold, RN, Sidjabat, HE, Filippich LJ and DJ Trott (2008) Multidrug-resistant E. coli and Enterobacter extraintestinal infection in thirty-seven dogs. J. Vet. Int. Med. 22, 844-850.

    13. Tree, JJ, Ulett, GC, Ong, CY, Trott, DJ, McEwan, AG and MA Schembri (2008) Trade-off between iron uptake and protection against oxidative stress: deletion of cueO promotes UPEC virulence in a mouse model of urinary tract infection. J. Bacteriol. 190, 6909-6912.

    14. Milinovich, GJ, Burrell, PC, Pollitt, CC, Klieve, AV, Blackall, LL, Ouwerkerk, D, Woodland, E and DJ Trott (2008)  Microbial ecology of the equine hindgut during oligofructose-induced laminitis. ISME J. 2, 1089-1100.

    15. Litster AL, Moss SM and DJ Trott (2008) Urinary tract infection in cats. J. Small Anim. Pract. 49, 548.

    16. Litster, AL, Moss, SM, Platell, J and DJ Trott (2009) Occult bacterial lower urinary tract infections in cats – urinalysis and culture findings. Vet. Microbiol. 136, 130-134.

    17. Sidjabat HE, Chin JJ-C, Chapman, T, Wu, K, Ong, CY, Ulett, GC, Schembri, MA, Johnson, JR and DJ Trott (2009) Colonisation dynamics and virulence of two clonal groups of multidrug-resistant Escherichia coli isolated from dogs. Microb. Infect. 11, 100-107.

    18. Jordan, D, Chin JJ-C, Fahy, VA, Barton, MD, Smith MG and DJ Trott (2009) Antimicrobial use in the Australian pig industry - results of a national survey. Aust. Vet. J. 87, 222-229.

    19. Gibson JS, Cobbold RN, Heisig P, Sidjabat HE, Kyaw-Tanner MT and DJ Trott (2010) Identification of Qnr and AAC(6')-1b-cr plasmid-mediated fluoroquinolone resistance determinants in multidrug-resistant Enterobacter spp. isolated from extraintestinal infections in companion animals. Vet. Microbiol., 143, 329-336.

    20. Smith MG, Jordan D, Chapman TA, Chin JJ, Barton MD, Do TN, Fahy VA, Fairbrother JM and DJ Trott (2010) Antimicrobial resistance and virulence gene profiles in multi-drug resistant enterotoxigenic Escherichia coli isolated from pigs with post-weaning diarrhoea. Vet. Microbiol. 145, 299-307. [IF 3.256].

    21. Gibson JS, Cobbold RN and DJ Trott (2010) Characterization of multidrug-resistant Escherichia coli isolated from extraintestinal clinical infections in animals. J. Med. Microbiol. 59, 592-598.

    22. Milinovich GJ, Klieve AV, Pollitt CC and DJ Trott (2010) Microbial events in the hindgut during carbohydrate-induced equine laminitis. Vet. Clin. North Am. Equine Pract., 26, 79-94.

    23. Platell JL, Cobbold RN, Johnson JR and DJ Trott (2010) Clonal group distribution of fluoroquinolone-resistant Escherichia coli among humans and companion animals in Australia. J. Antimicrob. Chemother. 65, 1936-1938.

    24. Gibson JS, Morton JM, Cobbold RN, Filippich LJ and DJ Trott (2011) Risk factors for multidrug-resistant Escherichia coli rectal colonization of dogs on admission to a veterinary hospital. Epidemiol. Infect. 139, 197-205

    25. Gibson JS, Cobbold RN, Kyaw-Tanner MT, Heisig P and DJ Trott (2011) Fluoroquinolone resistance mechanisms in multidrug-resistant Escherichia coli isolated from extraintestinal infections in dogs. Vet. Microbiol. 146, 161-6.

    26. Thompson MF, Totsika M, Schembri MA, Mills PC, Seton EJ and DJ Trott (2011) Experimental colonization of the canine urinary tract with the asymptomatic bacteriuria Escherichia coli strain 83972. Vet. Microbiol. 147, 205-8. 

    27. Gibson JS, Morton JM, Cobbold RN, Filippich LJ and DJ Trott (2011) Risk factors for dogs becoming rectal carriers of multidrug-resistant Escherichia coli during hospitalization Epidemiol. Infect. 139, 1511-21

    28. Litster AL, Thompson MF, Moss SM and DJ Trott (2011) Feline bacterial urinary tract infections: An update on an evolving clinical problem. Vet J. 187, 18-22.

    29. Thompson, MF, Litster, AL, Platell, JL and DJ Trott (2011) Canine bacterial urinary tract infections: New developments in old pathogens. Vet. J. 190, 22-7

    30. Jordan D, Simon J, Fury S, Moss S, Giffard P, Maiwald M, Southwell P, Barton MD, Axon JE, Morris SG and DJ Trott (2011) Carriage of methicillin-resistant Staphylococcus aureus by veterinarians in Australia. Aust. Vet. J. 89, 152-9.

    31. Platell JL, Johnson JR, Cobbold RN and DJ Trott (2011) Multidrug-resistant pathogenic Escherichia coli of sequence type ST131 in animals and food. Vet. Microbiol. 153, 99-108.

    32. Govendir M, Norris JM, Hansen, T, Wigney, DI, Muscatello, G, Trott, DJ and R Malik (2011) Susceptibility of rapidly growing Mycobacteria and Nocardia isolates from cats and dogs to pradofloxacin. Vet. Microbiol. 153, 240-245.

    33. Platell, JL, Cobbold, RN, Johnson, JR, Heisig, A, Heisig, P, Clabots, C, Kuskowski, MA and DJ Trott (2011) Commonality among fluoroquinolone-resistant sequence type ST131 extraintestinal Escherichia coli isolates from humans and companion animals in Australia. Antimicrob. Agents Chemother. 55, 3782-3787.

    34. Bateman, FL, Moss, SM, Trott, DJ and MA Shipstone (2012) Biological efficacy and stability of diluted ticarcillin-clavulanic acid in the topical treatment of Pseudomonas aeruginosa infections. Vet. Dermatol. 23, 97-102.

    35. Platell, JL, Cobbold, RN, Johnson, JR, Clabots, CR and DJ Trott (2012) Fluoroquinolone-resistant extraintestinal Escherichia coli clinical isolates representing the O15:K52:H1 clonal group from humans and dogs in Australia. Comp. Immunol. Microbiol. Infect. Dis. 35, 319-24.

    36. Johnson, JR, Nicolas-Chanoine, MH, DebRoy, C, Castanheira, M, Robicsek, A, Hansen, G, Weissman, S, Urban, C, Platell, J, Trott, D, Zhanel, G, Clabots, C, Johnston, BD and MA Kuskowski (2012) Comparison of Escherichia coli ST131 pulsotypes by epidemiologic traits, 1967-2009. Emerg. Infect. Dis. 18, 598-607.

    37. Thompson, MF, Schembri, MA, Mills, PC and DJ Trott (2012) A modified three-dose protocol for colonization of the canine urinary tract with the asymptomatic bacteriuria Escherichia coli strain 83972. Vet. Microbiol.158, 446-50.

    38. Platell, JL, Trott, DJ, Johnson, JR, Heisig, P, Heisig, A, Clabots, CR, Johnston, B and RN Cobbold (2012) Prominence of an O75 clonal group (clonal complex 14) among non-ST131 fluoroquinolone-resistant Escherichia coli causing extraintestinal infections in humans and dogs in Australia. Antimicrob. Agents Chemother. 56, 3898-904.

    39. Eigland, KA, Lanyon, JM, Trott, DJ, Ouwerkerk, D, Blanshard, W, Milinovich, GJ, Gulino, L-M, Martinez, E, Merson, S and AV Klieve (2012) Bacterial community structure in the hindgut of wild and captive dugongs, Dugong dugon. Aquatic Mammals. 38, 402-411.

    40. Johnson, JR, Tchesnokova, V, Johnston, B, Clabots, C, Roberts, PL, Billig, M, Riddell, K, Rogers, P, Qin, X, Butler-Wu, S, Price, LB, Aziz, M, Nicolas-Chanoine, MH, DebRoy, C, Robicsek, A, Hansen, G, Urban, C, Platell, J, Trott, D, Zhanel, G, Weissman, SJ, Cookson, BT,  Fang, FC, Limaye, A,  Scholes, D, Chattopadhyay, S, Hooper, DC and EV Sokurenko (2013) Abrupt emergence of a single dominant multi-drug-resistant strain of Escherichia coli. J. Infect. Dis. 207, 919-28.

    41. Trott, DJ (2013) β-lactam resistance in Gram-negative pathogens isolated from animals. Curr. Pharm. Des. 19, 239-249.

    42. Guo, S, Brouwers, H, Cobbold RN, Platell JL, Chapman, TA, Barrs, VR, Johnson JR and DJ Trott (2013) Fluoroquinolone-resistant extraintestinal pathogenic Escherichia coli, including O25b-ST131, isolated from faeces of hospitalized dogs in an Australian veterinary referral centre. J. Antimicrob. Chemother. 68, 1025-31.   

    43. Feary, DJ, Abraham, Woolford, SL and DJ Trott (2013) Identification of Actinomyces denticolens as a cause of a soft tissue abscess in a horse. Aust. Vet. J. 91, 416-417.

    44. Trott D, Jordan D, Barton, M, Abraham, S and M Groves (2013) Vets vs pets: methicillin-resistant Staphylococcus aureus in Australian animals and their doctors. Australian Microbiologist 34: 28-31.

    45.    Abraham, S, Groves, MD, Trott, DJ, Chapman, TA, Turner, B, Hornitzky, M and D Jordan (2014) Salmonella enterica isolated from infections in Australian livestock remain susceptible to high importance antimicrobial agents. Int. J. Antimicrob. Agents 43: 126-30.

    46.    Abraham S, Wong HS, Turnidge J, Johnson JR and DJ Trott (2014). Carbapenemase-producing bacteria in companion animals: a public health concern on the horizon. J. Antimicrob. Chemother. 69: 1155-7.

    47.    Groves, MD, O’Sullivan, MVN, Chapman, TA, Brouwers, HJM, Abraham, S, Trott, DJ, Al Jassim, R, Coombs, GW,  Skov, RL and D Jordan (2014) Staphylococcus aureus ST398 detected in pigs in Australia. J. Antimicrob. Chemother. 69: 1426-8.

    48.    Siak, M, Burrows AK, Coombs, GW, Khazandi, M, Abraham, S, Norris, JM, Weese, JS and DJ Trott (2014) Characterization of meticillin-resistant and meticillin-susceptible isolates of Staphylococcus pseudintermedius from cases of canine pyoderma in Australia. J. Med. Microbiol. 63: 1228-33.

    49.    Abraham S, Trott, DJ, Jordan, D, Gordon, DM, Groves, MD, Fairbrother, JM, Smith MG, Zhang R and TA Chapman (2014). Phylogenetic and molecular insights into the evolution of multidrug-resistant porcine enterotoxigenic Escherichia coli in Australia. Int. J. Antimicrob. Agents. 44: 105-11.

    50.    Smith M, Do TN, Gibson J.S.  Jordan D, Cobbold RN and DJ Trott (2014) Comparison of antimicrobial resistance phenotypes and genotypes in enterotoxigenic Escherichia coli isolated from Australian and Vietnamese pigs. J. Glob. Antimicrob. Resist. 2: 162-7.

    51.    Khazandi M, Bird PS, Owens J, Wilson G, Meyer JN and DJ Trott (2014). In vitro efficacy of cefovecin against anaerobic bacteria isolated from subgingival plaque of dogs and cats with periodontal disease. Anaerobe. 28: 104-8.

    52.    Guo S, Wakeham D, Brouwers HJ, Cobbold RN, Abraham S, Mollinger JL, Johnson JR, Chapman TA, Gordon DM, Barrs VR and DJ Trott (2015). Human-associated fluoroquinolone-resistant Escherichia coli clonal lineages, including ST354, isolated from canine feces and extraintestinal infections in Australia. Microbes Infect. 17: 266-74.

    53.    Nugroho W, Cargill CF, Putra IM, Kirkwood RN, Trott DJ, Salasia SI, Reichel MP (2015) Traditional pig farming practices and productivity in the Jayawijaya region, Papua Province, Indonesia. Trop. Anim. Health. Prod. 47: 495-502.

    54.    Bird PS, Boardman WSJ, Trott DJ and LL Blackall (2015) Marsupial oral cavity microbiome. Microbiology Australia

    55.    Wang, W, Song, Y, Petrovski, K, Eats, P, Trott, DJ, X Wong, H-S, Page, S,  Perry, J and S Garg (2015) Development of intramammary delivery systems containing lasalocid for the treatment of bovine mastitis: impact of solubility improvement on safety, efficacy and milk distribution in dairy cattle. J. Drug Des. Devel. Therap. 9: 631-42.

    56.    Blyton MDJ, Pi H, Vangchhia B, Abraham S, Trott, DJ, Johnson, JR, Gordon D (2015) The genetic structure and antimicrobial resistance of Escherichia coli and cryptic clades in birds with diverse human associations. Appl. Environ. Microbiol. May 22. pii: AEM.00861-15. [Epub ahead of print].

    57.    Duffield R, Wong H-S, Trott DJ, and PB Hill (2015) Survival of Pseudomonas aeruginosa in modified Romanowsky staining solutions. Vet. Dermatol. 26:223-e48.

    58.   Khazandi Khazandi M, Eats P, Trott DJ,  Ebrahimie E, Perry J, Hickey E, Page S, Garg S and KR Petrovski (2015) Development of an improved Streptococcus uberis experimental mastitis challenge model using different doses and strains in lactating dairy cows. J Dairy Res. 82, 470–477.

    59. Nugroho, W, Cargill, CF, Putra, IM, Kirkwood, RN, Trott, DJ, Oktavia Salasia, SIO, Slipranata, M and MP Reichel (2015) Investigations of selected pathogens among village pigs in Central Papua, Indonesia. Trop Anim Health Prod. 48, 29-36.

    60. Abraham S, Jordan D, Wong HS,  Johnson JR, Toleman, MA, Wakeham DL, Gordon, DM, Turnidge JD, Mollinger JL, Gibson  JS and DJ Trott (2015) First detection of extended-spectrum cephalosporin and fluoroquinolone-resistant Escherichia coli in Australian food-producing animals. J Glob Antimicrob Resist. 3, 273-277.

    61. Groves, MD, Crouch B, Coombs GW, Jordan D, Pang, S, Barton MD, Giffard P, Abraham S and DJ Trott (2016) Molecular epidemiology of methicillin-resistant Staphylococcus aureus isolated from Australian veterinarians. PloS One. 11, e0146034.

    62. Smith MG, Jordan D, Gibson JS, Cobbold RN, Chapman TA, Abraham S, Chin JJ-C and DJ Trott (2016) Phenotypic and genotypic profiling of antimicrobial resistance in enteric Escherichia coli communities isolated from finisher pigs in Australia. Aust Vet J. 94, 371-6.

    63. Abraham RJ, Stevens AJ, Young KA, Russell C, Qvist A, Khazandi M, Wong HS, Abraham S, Ogunniyi AD, Page SW, O'Handley R, McCluskey A and DJ Trott (2016) Robenidine analogues as Gram-positive antibacterial agents. J Medicin Chem. 59, 2126-38.

    64. Bird PS, Trott DJ, Mikkelsen D, Milinovich, GJ, Hillman KM, Burrell PC  and LL Blackall (2016) Porphyromonas loveana sp. nov. a novel Porphyromonas species isolated from the oral cavity of Australian marsupials. Int J System Evol Microbiol. Aug 10. doi: 10.1099/ijsem.0.000898. [Epub ahead of print].

    65. Worthing KA, Coombs GW, Pang S, Abraham S, Saputra S, Trott DJ, Jordan D, Wong HS, Abraham RJ, Norris JM (2016) Isolation of mecC MRSA in Australia. J Antimicrob Chemother. 71, 2348-9.

    66. Jahanbakhsh S, Smith MG, Kohan-Ghadr HR, Letellier A, Abraham S, Trott DJ, Fairbrother JM (2016) Dynamics of extended-spectrum cephalosporin resistance in pathogenic Escherichia coli isolated from diseased pigs in Quebec, Canada. Int J Antimicrob Agents. 48, 194-202.

    67. Vangchhia B, Abraham S, Bell JM, Collignon P, Gibson JS, Ingram PR, Johnson JR, Kennedy K, Trott DJ, Turnidge JD, Gordon DM (2016) Phylogenetic diversity, antimicrobial susceptibility and virulence characteristics of phylogroup F Escherichia coli in Australia. Microbiology. doi: 10.1099/mic.0.000367. [Epub ahead of print]

    68. Smith MG, Jordan D, Gibson JS, Cobbold RN, Chapman TA, Abraham S, Trott DJ (2016) Phenotypic and genotypic profiling of antimicrobial resistance in enteric Escherichia coli communities isolated from finisher pigs in Australia. Aust Vet J. 94, 371-6.

    69. Abraham S, O'Dea M, Trott DJ, Abraham RJ, Hughes D, Pang S, McKew G, Cheong EY, Merlino J, Saputra S, Malik R, Gottlieb T (2016) Isolation and plasmid characterization of carbapenemase (IMP-4) producing Salmonella enterica Typhimurium from cats. Sci Rep. 6:35527.

    70. Garg S, Wang W, Song Y, Eats P, Trott DJ, Page SW, Petrovski K. Development of intramammary drug delivery systems: novel in-vitro release method. J Pharm Sci. S0022-3549(16)41850-2. doi: 10.1016/j.xphs.2016.11.012. [Epub ahead of print].

    71. Knight, EV, Trott, DJ, Page, SW, Garg, S, Zhang, Q, Song, Y, Ebrahimie, E, Mills, PC and MA Shipstone (2016) In vitro comparison of the dermal penetration of three different topical formulations containing lasalocid. Vet Dermatol. (in press; acceptance date 30th September 2016).

  • Professional Associations

    Member of the Animal Health Australian Infectious Diseases Advisory Panel (since 2010).

    AIDAP is an independent panel of companion animal veterinary specialists sponsored by Zoetis. It is currently developing evidence-based policy and procedures to advise companion animal veterinarians in Australia on the treatment of infectious diseases in dogs and cats, particularly to mitigate the development of antibiotic resistance. AIDAP has conducted the first survey on antibiotic prescribing practices by Australian companion animal veterinarians in over 20 years, has developed antibiotic prudent use guidelines for the recommended treatment of the most common infectious diseases in dogs and cats in Australia and will shortly develop easy to follow infection control guidelines for companion animal practice.

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Entry last updated: Monday, 18 Dec 2017

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