The aim of this study was to evaluate the prevalence and types of antimicrobial resistance among Gram-negative enteric bacteria isolated from Pelophylax sp. Fifty-four frogs were collected from six provinces in the Eastern Black Sea Region of Turkey. In the cloacal swab cultures, bacteria from 160 different colonies were identified by biochemical tests, automated systems, and matrix-assisted laser desorption ionisation-time of flight mass spectrometry. The antimicrobial susceptibility tests were performed by the disk diffusion method. The observed drug resistance rate was the highest to ampicillin and cefazolin, while the lowest against ciprofloxacin and tetracycline. In the molecular assays, bla TEM (8 Citrobacter spp.), bla SHV (2 Escherichia coli, 1 Hafnia alvei, and a Serratia liquefaciens), tetA genes (E. coli and Klebsiella spp.) and a class 1 integron without any gene cassette (E. coli) were detected. Among the strains, no plasmid-mediated quinolone resistance [qnrA, qnrB, qnrS, qepA and aac (6 ′)-Ib-cr] was found. However, two of three quinolone-resistant Klebsiella strains showed the novel amino acid substitution in the gyrA gene resulting in Ser83Asp and Asp87Glu.The clonality between E. coli isolates was also examined by pulsed-field gel electrophoresis. We consider that multidrug-resistant Gram-negative enteric bacteria in the intestinal microbiota of a cosmopolitan frog species might be a reservoir for antibiotic resistance genes.
Altschul, S. F. , Gish, W. , Miller, W. , Myers, E. W. and Lipman, D. J. (1990): Basic local alignment search tool. J. Mol. Biol. 215, 403–410.
Arlet, G. , Brami, G. , Decre, D. , Flippo, A. , Gaillot, O. , Lagrange, P. H. and Philippon, A. (1995): Molecular characterisation by PCR-restriction fragment length polymorphism of TEM beta-lactamases. FEMS Microb. Lett. 134, 203–208.
Arlet, G. , Rouveau, M. and Philippon, A. (1997): Substitution of alanine for aspartate at position 179 in the SHV-6 extended spectrum beta lactamase. FEMS Microb. Lett. 152, 163–167.
Ausubel, F. M. , Brient, R. , Kingston, R. E. , Moore, D. D. , Seidman, J. G. , Smith, J. A. and Struhl, K. (1995): Short Protocols in Molecular Biology. 2nd edition. John Wiley & Sons, New York.
Balta, F. , Sandalli, C. , Kayis, S. and Ozgumus, O. B. (2010): Molecular analysis of antimicrobial resistance in Yersinia ruckeri strains isolated from rainbow trout (Oncorhynchus mykiss) grown in commercial fish farms in Turkey. Bull. Eur. Ass. Fish Pathol. 30, 211–219.
Boman, H. G. (2000): Innate immunity and the normal microflora. Immun. Rev. 173, 5–16.
Bryne-Bailey, K. G. , Gaze, W. H. , Zhang, L. , Kay, P. , Boxall, A. , Hawkey, P. M. and Wellington, E. M. (2011): Integron prevalence and diversity in manured soil. Appl. Environ. Microb. 77 ,684–687.
Carroll, D. , Wang, J. , Fanning, S. and McMahon, B. J. (2015): Antimicrobial resistance in wildlife: Implications for public health. Zoonoses Public Health 62, 534–542.
Cattoir, V. , Poirel, L. , Rotimi, V. , Soussy, C. J. and Nordmann, P. (2007): Multiplex PCR for detection of plasmid-mediated quinolone resistance qnr genes in ESBL-producing enterobacterial isolates. J. Antimicrob. Chemother. 60, 394–397.
Chaibi, E. B. , Sirot, D. , Paul, G. and Labia, R. (1999): Inhibitor resistant TEM β-lactamases: phenotypic, genetic and biochemical characteristics. J. Antimicrob. Chemother. 43, 447–458.
Cissell, R. L. (2006): Occurrence of Antibiotic Resistance in Environmental and Amphibian E. coli Isolates Associated with Cattle and Aquatic Environments. Master’s Thesis, University of Tennessee, Knoxville, USA.
Cullen, M. E. , Wyke, A. W. , Kuroda, R. and Fisher, L. M. (1989): Cloning and characterization of a DNA gyrase A gene from Escherichia coli that confers clinical resistance to 4-quinolones. Antimicrob. Agents Chemother. 33, 886–894.
Durmaz, R. , Otlu, B. and Koksal, F. (2009): The optimization of a rapid pulsed-field gel electrophoresis protocol for the typing of Acinetobacter baumannii, Escherichia coli and Klebsiella spp. Jpn. J. Infect. Dis. 62, 372–377.
Erismis, U. C. (2011): Abundance, demography and population structure of Pelophylax ridibundus (Anura: Ranidae) in 26 August National Park (Turkey). North-West J. Zool. 7, 5–16.
EUCAST (2016): Breakpoint Tables for Interpretation of MICs and Zone Diameters. Version 6.0, 2016. The European Committee on Antimicrobial Susceptibility Testing. http://www.eucast.org.
Ferranti, M. , Cicogna, G. T. , Sattin, A. and Alaibac, M. (2018): Citrobacter freundii sepsis in an immunosuppressed patient with pemphigus vulgaris. BMJ Case Rep. 11, 227091.
Fluit, A. C. and Schmitz, F. J. (2004): Resistance integrons and superintegrons. Clin. Microbiol. Infect. 10, 272–288.
Gilliver, M. A. , Bennet, M. , Begon, M. , Hazel, S. M. and Hart, C. A. (1999): Antibiotic resistance found in wild rodents. Nature 401, 233–234.
Gonçalves, A. , Igrejas, G. , Radhouani, H. , Estepa, V. , Alcaide, E. , Zorrilla, I. , Serra, R. , Torres, C. and Poeta, P. (2012): Detection of extended-spectrum beta-lactamase-producing Escherichia coli isolates in faecal samples of Iberian lynx. Lett. App. Microbiol. 54, 73–77.
Grinsted, J. F. , Cruz, D. L. and Schmitt, R. (1990): The Tn21 subgroup of bacterial transposable elements. Plasmid 24, 163–189.
Guardabassi, L. , Dijkshoorn, L. , Collard, J. M. , Olsen, J. E. and Dalsgaard, A. (2000): Distribution and in-vitro transfer of tetracycline resistance determinants in clinical and aquatic Acinetobacter strains. J. Med. Microbiol. 49, 929–936.
Hacioglu, N. and Tosunoglu, M. (2014): Determination of antimicrobial and heavy metal resistance profiles of some bacteria isolated from aquatic amphibian and reptile species. Environ. Monit. Assess. 86, 407–413.
Hird, D. W. , Diesch, S. L. , McKinnell, R. G. , Gorham, E. , Martin, F. B. , Meadows, C. A. and Gasiorowski, M. (1983): Enterobacteriaceae and Aeromonas hydrophila in Minnesota frogs and tadpoles (Rana pipiens). Appl. Environ. Microbiol. 46, 1423–1425.
Hosoglu, S. , Esen, S. , Ozturk, R. , Altındis, M. , Ertek, M. , Kaygusuz, S. , Caylan, R. , Demirdag, K. , Sencan, I. , Ertem, G.T. , Aslan, S. , Bosnak, V. , Aygun, P. , Erol, S. and Celen, M. K. (2005): The effect of a restriction policy on the antibiotic consumption in Turkey: a country-wide study. Eur. J. Clin. Pharmacol. 61, 727–731.
Jacoby, G. A. (2005): Mechanisms of resistance to quinolones. Clin. Infec. Dis. 41, 120–126.
Kadavy, D. R. , Hornby, J. M. , Haverkost, T. and Nickerson, K. W. (2000): Natural antibiotic resistance of bacteria isolated from larvae of the oil fly, Helaeomyia petrolei. Appl. Environ. Microbiol. 66, 4615–4619.
Kim, H. B. , Park, C. H. , Kim, C. J. , Kim, E. C. , Jacoby, G. A. and Hooper, D. C. (2009): Prevalence of plasmid-mediated quinolone resistance determinants over a 9-year period. Antimicrob. Agents Chemother. 53, 639–645.
Lévesque, C. , Piche, L. , Larose, C. and Roy, P. H. (1995): PCR mapping of integrons reveals several novel combinations of resistance genes. Antimicrob. Agents Chemother. 39, 185–191.
Lim, K. T. , Yasin, R. , Yeo, C. C. , Puthucheary, S. and Thong, K. L. (2009): Characterization of multidrug resistant ESBL-producing Escherichia coli isolates from hospitals in Malaysia. J. Biomed. Biotechnol. 2009, 165637.
Machado, E. , Canto, R. , Baquero, F. , Gala, J. C. , Rolla, A. , Peixe, L. and Coque, T. M. (2005): Integron content of extended-spectrum-beta-lactamase-producing Escherichia coli strains over 12 years in a single hospital in Madrid, Spain. Antimicrob. Agents Chemother. 49, 1823–1829.
Magiorakos, A.-P. , Srinivasan, A. , Carey, R. B. , Carmeli, Y. , Falagas, M. E. , Giske, C. G. , Harbarth, S. , Hindler, J. F. , Kahlmeter, G. , Olsson-Liljequist, B. , Paterson, D. L. , Rice, L. B. , Stelling, J. , Struelens, M. J. , Vatopoulos, A. , Weber, J. T. and Monnet, D. L. (2012): Multidrug-resistant, extensively drug-resistant and pandrug-resistant bacteria: an international expert proposal for interim standard definitions for acquired resistance. Clin. Microbiol. Infect. 18, 268–281.
Mahaney, P. A. (1994): Effects of fresh water petroleum contamination on amphibian hatching and metamorphosis. Environ. Toxicol. Chem. 13, 259–265.
Marshall, B. , Tachibana, C. and Levy, S. B. (1983): Frequency of tetracycline resistance determinant classes among lactose fermenting coliforms. Antimicrob. Agents Chemother. 24, 835–840.
Marti, E. , Variatza, E. and Balcazar, J. L. (2014): The role of aquatic ecosystems as reservoirs of antibiotic resistance. Trends Microbiol. 22, 36–41.
Minette, H. P. (1984): Epidemiologic aspects of salmonellosis in reptiles, amphibians, mollusks and crustaceans – a review. Int. J. Zoonoses. 11, 95–104.
Moon, D. C. , Seol, S. Y. , Gurung, M. , Jin, J. S. , Choi, C. H. , Kim, J. , Lee, Y. C. , Cho, D. T. and Lee, J. C. (2010): Emergence of a new mutation and its accumulation in the topoisomerase IV gene confers high levels of resistance to fluoroquinolone in Escherichia coli isolates. Int. J. Antimicrob. Agents 35, 76–79.
Napier, M. D. , Haugland, R. , Poole, C. , Dufour, A. P. , Stewart, J. R. and Weber, D. J. (2017): Exposure to human-associated faecal indicators and self-reported illness among swimmers at recreational beaches: a cohort study. Environ. Health 16, 103.
Ozgumus, O. B. , Caylan, R. , Tosun, I. , Sandalli, C. , Aydin, K. and Koksal, I. (2007): Molecular epidemiology of clinical Pseudomonas aeruginosa isolates carrying the IMP-1 metallo-beta-lactamase gene in a university hospital in Turkey. Microb. Drug Resist. 13, 191–198.
Ozgumus, O. B. , Sandalli, C. , Sevim, A. , Celik-Sevim, E. and Sivri, N. (2009): Class 1 and class 2 integrons and plasmid-mediated antibiotic resistance in coliforms isolated from ten rivers in northern Turkey. J. Microbiol. 47, 19–27.
Park, C. H. , Robicsek, A. , Jacoby, G. A. , Sahm, D. and Hooper, D. C. (2006): Prevalence in the United States of aac(6)-Ib-cr encoding a ciprofloxacin-modifying enzyme. Antimicrob. Agents Chemother. 50, 3953–3955.
Robicsek, A. , Strahilevitz, J. , Sahm, D. F. , Jacoby, G. A. and Hooper, D.C. (2006): qnr prevalence in ceftazidime-resistant Enterobacteriaceae isolates from the United States. Antimicrob. Agents Chemother. 50, 2872–2874.
Rowe-Magnus, D. A. and Mazel, D. (2002): The role of integrons in antibiotic resistance gene capture. Int. J. Med. Microbiol. 292, 115–125.
Sandalli, C. , Ozgumus, O. B. and Sevim, A. (2010): Characterization of tetracycline resistance genes in tetracycline resistant Enterobacteriaceae obtained from a coliform collection. World J. Microbiol. Biotechnol. 26, 2099–2103.
Schmidt, A. S. , Bruun, M. S. , Dalsgaard, I. and Larsen, J. L. (2001): Incidence, distribution, and spread of tetracycline resistance determinants and integron-associated antibiotic resistance genes among motile aeromonads from a fish farming environment. Appl. Environ. Microbiol. 67, 5675–5682.
Sewell, D. and Griffiths, R. A. (2009): Can a single amphibian species be a good biodiversity indicator? Diversity 1, 102–117.
Taylor, N. G. H. (2011): Aquatic systems: maintaining, mixing and mobilising antimicrobial resistance? Trends Ecol. Evol. 26, 278–284.
Tenover, F. C. , Arbeit, R. D. and Goering, R. V. (1995): Interpreting chromosomal DNA restriction patterns produced by pulsed-field gel electrophoresis: criteria for bacterial strain typing. J. Clin. Microbiol. 33, 2233–2239.
Thompson, J. D. , Higgins, D. G. and Gipson, T. J. (1994): CLUSTAL W: improving the sensitivity of progressive multiple sequence alignments through sequence weighting, position-specific gap penalties and weight matrix choice. Nucleic Acids Res. 22, 4673–4680.
Villa, J. , Ruiz, J. , Goni, P. and Jimenes de Anta, M. T. (1996): Detection of mutations of parC in quinolone-resistance clinical isolates of Escherichia coli. Antimicrob. Agents Chemother. 40, 491–493.
Wang, J. T. , Chang, S. C. , Chen, Y. C. and Luh, K. T. (2000): Comparison of antimicrobial susceptibility of Citrobacter freundii isolates in two different time periods. J. Microbiol. Immunol. Infect. 33, 258–362.
Webber, M. and Piddock, L. J. V. (2001): Quinolone resistance in Escherichia coli. Vet. Res. 32, 275–284.
Wells, K. D. (2007): The Ecology and Behavior of Amphibians. The University of Chicago Press.
White, P. A. , McIver, C. J. and Rawlinson, W. D. (2001): Integrons and gene cassettes in the Enterobacteriaceae. Antimicrob. Agents Chemother. 45, 2658–6261.