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Zheng Y, Yu Q, Han L, Chen X. Molecular Characterization of Resistance and Virulence Factors of Trueperella pyogenes Isolated from Clinical Bovine Mastitis Cases in China. Infect Drug Resist 2024; 17:1979-1986. [PMID: 38800580 PMCID: PMC11122176 DOI: 10.2147/idr.s433578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 04/11/2024] [Indexed: 05/29/2024] Open
Abstract
Purpose The present study was designed to investigate the resistance determinants and virulence factors of 45 Trueperella pyogenes isolates from clinical bovine mastitis in Hexi Corridor of Gansu, China. Methods Minimum inhibitory concentrations (MICs) was tested by E-test method. Gene of antimicrobial resistance, virulence integrase and integron gene cassettes were determined by PCR and DNA sequencing. Results The T. pyogenes isolates exhibited high resistance to streptomycin (88.9%) and tetracycline (64.4%), followed by erythromycin (15.6%) and gentamicin (13.3%). Resistance to streptomycin was most commonly encoded by aadA9 (88.9%); and to tetracycline, by tetW (64.4%). Importantly, all streptomycin-resistant isolates carried aadA9 alone or in combination with aadA1, aadA11 and strA-strB. Similarly, all tetracycline-resistant isolates harbored tetW alone or in combination with tetA33. Meanwhile, ermX was detected in 13.3% isolates, only one erythromycin-resistant isolate was not identified for this gene. Moreover, all T. pyogenes isolates carried class 1 integrons, and 17.8% of them contained gene cassettes, including arrays aadA1-aadB (4.4%), aad A24-dfrA1-ORF1 (2.2%) and aadA1 (2.2%). Furthermore, all tested isolates harbored virulent genes plo and fimA, followed by fimC (88.9%), fimE (86.6%) nanP (75.6%), nanH (40.0%), cbpA (35.6%) and fimG (6.7%). Conclusion To our knowledge, this is the first report of integron gene cassettes of T. pyogenes isolates from bovine mastitis cases in China. These findings are useful for developing the prevention and the virulence factors of T. pyogenes could be promising candidates for vaccine antigens for bovine mastitis caused by T. pyogenes in China.
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Affiliation(s)
- Ya Zheng
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, 730070, People’s Republic of China
| | - Qunli Yu
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, 730070, People’s Republic of China
| | - Ling Han
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, 730070, People’s Republic of China
| | - Xinyi Chen
- School of Biotechnology, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China
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2
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Li XS, Qi Y, Li PH, Xue JZ, Li XY, Muhammad I, Li YZ, Zhu DM, Ma Y, Kong LC, Ma HX. Genetic characterization of MDR genomic elements carrying two aac(6')- aph(2″) genes in feline-derived clinical Enterococcus faecalis isolate. Front Microbiol 2023; 14:1191837. [PMID: 37577435 PMCID: PMC10413266 DOI: 10.3389/fmicb.2023.1191837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023] Open
Abstract
Multidrug-resistant Enterococcus faecalis (E. faecalis) often cause intestinal infections in cats. The aim of this study was to investigate a multidrug-resistant E. faecalis isolate for plasmidic and chromosomal antimicrobial resistance and their genetic environment. E. faecalis strain ESC1 was obtained from the feces of a cat. Antimicrobial susceptibility testing was carried out using the broth microdilution method. Conjugation experiments were performed using Escherichia coli and Staphylococcus aureus as receptors. Complete sequences of chromosomal DNA and plasmids were generated by whole genome sequencing (WGS) and bioinformatics analysis for the presence of drug resistance genes and mobile elements. Multidrug-resistant E. faecalis ESC1 contained a chromosome and three plasmids. The amino acid at position 80 of the parC gene on the chromosome was mutated from serine to isoleucine, and hence the amino acid mutation at this site led to the resistance of ESC1 strain to fluoroquinolones. Eleven antibiotic resistance genes were located on two plasmids. We identified a novel composite transposon carrying two aminoglycoside resistance genes aac(6')-aph(2″). This study reported the coexistence of a novel 5.4 kb composite transposon and a resistance plasmid with multiple homologous recombination in an isolate of E. faecalis ESC1. This data provides a basis for understanding the genomic signature and antimicrobial resistance mechanisms of this pathogen.
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Affiliation(s)
- Xue-Song Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Yu Qi
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Peng-hui Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Jun-ze Xue
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Xuan-yu Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Inam Muhammad
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
- Department of Zoology, Shaheed Benazir Bhutto University, Sheringal, Pakistan
| | - Ya-zhuo Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Dao-mi Zhu
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Ying Ma
- Liaoyuan Animal Disease Prevention and Control Center, Liaoyuan, China
| | - Ling-Cong Kong
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Hong-Xia Ma
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
- The Engineering Research Center of Bioreactor and Drug Development, Ministry of Education, Jilin Agricultural University, Changchun, China
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3
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Wang Y, Haqmal MA, Liang YD, Muhammad I, Zhao XO, Elken EM, Gao YH, Jia Y, He CG, Wang YM, Kong LC, Ma HX. Antibacterial activity and cytotoxicity of a novel bacteriocin isolated from Pseudomonas sp. strain 166. Microb Biotechnol 2022; 15:2337-2350. [PMID: 35849816 PMCID: PMC9437881 DOI: 10.1111/1751-7915.14096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/15/2022] [Accepted: 05/18/2022] [Indexed: 11/30/2022] Open
Abstract
Pseudomonas sp. strain 166 was isolated from soil samples from Changbai Mountains. A novel bacteriocin PA166 from Pseudomonas sp. 166 was purified using ammonium sulfate, dextran gel chromatography column and Q-Sepharose column chromatography successively. The molecular mass of bacteriocin PA166 was found to be 49.38 kDa by SDS-PAGE and liquid chromatography-mass spectrometry (MS)/MS. Bacteriocin PA166 showed stability at a wide range of pH (2-10), and thermal stability (40, 60, 80 and 100°C). The bacteriocin PA166 antimicrobial activity was slightly inhibited by Ca2+ , K+ and Mg2+ . The minimum bactericidal concentrations of bacteriocin PA166 against five Pasteurella multocida strains ranged from 2 to 8 μg ml-1 . Bacteriocin PA166 showed low cytotoxicity and a higher treatment index (TI = 82.51). Fluorescence spectroscopy indicated that bacteriocin PA166 destroyed the cell membrane to exert antimicrobial activity. In summary, bacteriocin PA166 had strong antibacterial activity, high TI and low toxicity, and hence could serve as a potential clinical therapeutic drug.
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Affiliation(s)
- Yu Wang
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - M Aman Haqmal
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Yue-Dong Liang
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Inam Muhammad
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China.,Department of Animal Sciences, Shaheed Benazir Bhutto University Sheringal Dir Upper-Pakistan, Sheringal, Pakistan
| | - Xiao-Ou Zhao
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Emad Mohammed Elken
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China.,Animal Production Department, Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, 11884, Egypt
| | - Yun-Hang Gao
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Yu Jia
- Jilin Agricultural University, College of Life Science, Changchun, China
| | - Cheng-Guang He
- Jilin Agricultural University, College of Life Science, Changchun, China
| | - Yi-Ming Wang
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Ling-Cong Kong
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China.,The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Xincheng Street No. 2888, Changchun, 130118, China
| | - Hong-Xia Ma
- Jilin Agricultural University, College of Life Science, Changchun, China.,The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Xincheng Street No. 2888, Changchun, 130118, China.,The Engineering Research Center of Bioreactor and Drug Development, Ministry of Education, Jilin Agricultural University, Changchun, China
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Qin L, Meng F, He H, Yang YB, Wang G, Tang YD, Sun M, Zhang W, Cai X, Wang S. A Virulent Trueperella pyogenes Isolate, Which Causes Severe Bronchoconstriction in Porcine Precision-Cut Lung Slices. Front Vet Sci 2022; 8:824349. [PMID: 35174243 PMCID: PMC8841747 DOI: 10.3389/fvets.2021.824349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/23/2021] [Indexed: 12/02/2022] Open
Abstract
Trueperella pyogenes causes disease in cattle, sheep, goats and swine, and is involved occasionally in human disease worldwide. Most reports implicating T. pyogenes have been associated with clinical cases, whereas no report has focused on pathogenicity of T. pyogenes in mouse models or precision-cut lung slice (PCLS) cultures from swine. Here, we isolated and identified a virulent, β-hemolytic, multidrug-resistant T. pyogenes strain named 20121, which harbors the virulence marker genes fimA, fimE, nanH, nanP and plo. It was found to be highly resistant to erythromycin, azithromycin and medemycin. Strain 20121 was pathogenic in mouse infection models, displaying pulmonary congestion and inflammatory cell infiltration, partial degeneration in epithelial cells of the tracheal and bronchiolar mucosa, a small amount of inflammatory cell infiltration in the submucosa, and bacteria (>104 CFU/g) in the lung. Importantly, we used T. pyogenes 20121 to infect porcine precision-cut lung slices (PCLS) cultures for the first time, where it caused severe bronchoconstriction. Furthermore, dexamethasone showed its ability to relieve bronchoconstriction in PCLS caused by T. pyogenes 20121, highlighting dexamethasone may assist antibiotic treatment for clinical T. pyogenes infection. This is the first report of T. pyogenes used to infect and cause bronchoconstriction in porcine PCLS. Our results suggest that porcine PCLS cultures as a valuable 3D organ model for the study of T. pyogenes infection and treatment in vitro.
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Affiliation(s)
- Lei Qin
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Fandan Meng
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Haijuan He
- Institute of Animal Husbandry, Heilongjiang Academy of Agriculture Sciences, Harbin, China
| | - Yong-Bo Yang
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Gang Wang
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yan-Dong Tang
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Mingxia Sun
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Wenlong Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Xuehui Cai
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- *Correspondence: Xuehui Cai
| | - Shujie Wang
- National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- Shujie Wang
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5
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Isolation and partial characterization of a novel bacteriocin from Pseudomonas azotoformans with antimicrobial activity against Pasterella multocida. Arch Microbiol 2022; 204:112. [PMID: 34982208 DOI: 10.1007/s00203-021-02639-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 12/29/2022]
Abstract
In this study, a bacteriocin PA996 isolated from Pseudomonas azotoformans (P. azotoformans) was purified to homogeneity by ammonium sulphate precipitation and SP-Sepharose column chromatography. P. azotoformans began to grow at 6 h, reached exponential phase at 12-18 h. Bacteriocin PA996 was produced at 18 h and reached a maximum level of 2400 AU/mL. The molecular mass of purified bacteriocin PA996 was estimated by SDS-PAGE and its molecular mass was approximately 50 kDa. By screening in vitro, the bacteriocin PA996 showed an antimicrobial activity against Pasteurella multocida (P. multocida). The bacteriocin PA996 showed antibacterial activity in the range of pH2-10 and it was heat labile. The inhibitory activities were diminished after treatment with proteinase K, trypsin and papain, respectively, while catalase treatment was ineffective. The minimal inhibitory concentration (MIC) and bactericidal kinetics curves showed that the bacteriocin PA996 had a good inhibitory ability against P. multocida. Our data indicate that bacteriocin PA996 could inhibit the growth of P. maltocida and it may have the potential to apply as an alternative therapeutic drug.
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Ashrafi Tamai I, Mohammadzadeh A, Ghalyanchi Langeroudi A, Mahmoodi P, Ziafati Kafi Z, Pakbin B, Zahraei Salehi T. Complete genome sequence of Trueperella pyogenes strain Arash114, isolated from the uterus of a water buffalo (Bubalus bubalis) in Iran. BMC Res Notes 2021; 14:323. [PMID: 34425879 PMCID: PMC8381550 DOI: 10.1186/s13104-021-05734-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 08/11/2021] [Indexed: 11/30/2022] Open
Abstract
Objective Trueperella pyogenes has been considered a major causative agent of metritis, abortion, and death in a broad range of domestic and wild animals, including cattle, swine, sheep, goats, camels, buffalo, deer, antelopes, reptiles, and birds. Data description Here, we report the complete chromosome sequence of Trueperella pyogenes strain Arash114, isolated from the uterus of a water buffalo (Bubalus bubalis) died due to the infection caused by this pathogen. The genome assembly comprised 2,338,282 bp, with a 59.5% GC content. Annotation of the genome showed 46 tRNA genes, 6 rRNA, 1 CRISPR and 2059 coding sequences. Also, several genes coding for antimicrobial resistance such as tetW and virulence factor including plo, nanH, nanP, cbp and 4 fimbrial proteins were found. This study will advance our knowledge regarding the metabolism, virulence factors, antibiotic resistance and evolution of Arash114 strain and serve as an appropriate template for future researches.
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Affiliation(s)
- Iradj Ashrafi Tamai
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran
| | - Abdolmajid Mohammadzadeh
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran.
| | - Arash Ghalyanchi Langeroudi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Pezhman Mahmoodi
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran
| | - Zahra Ziafati Kafi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Babak Pakbin
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Taghi Zahraei Salehi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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Trueperella pyogenes pyolysin inhibits lipopolysaccharide-induced inflammatory response in endometrium stromal cells via autophagy- and ATF6-dependent mechanism. Braz J Microbiol 2021; 52:939-952. [PMID: 33454924 DOI: 10.1007/s42770-021-00422-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 01/05/2021] [Indexed: 10/22/2022] Open
Abstract
Trueperella pyogenes (T. pyogenes) is a common opportunistic pathogen of many livestock and play an important regulation role during multibacterial infection and interaction with the host by its primary virulence factor pyolysin (PLO). The purpose of this study was to investigate the regulation role of PLO which serve as a combinational pathogen with lipopolysaccharide (LPS) during endometritis. In this study, the expression of bioactive recombinant PLO (rPLO) in a prokaryotic expression system and its purification are described. Moreover, we observed that rPLO inhibited the innate immune response triggered by LPS and that methyl-β-cyclodextrin (MBCD) abrogated this inhibitory effect in goat endometrium stromal cells (gESCs). Additionally, we show from pharmacological and genetic studies that rPLO-induced autophagy represses gene expression by inhibiting NLRP3 inflammasome activation. Importantly, this study reported that ATF6 serves as a primary regulator of the cellular inflammatory reaction to rPLO. Overall, these observations suggest that T. pyogenes PLO could create an immunosuppressive environment for other pathogens invasion by regulating cellular signaling pathways.
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8
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Ahmed MFE, Alssahen M, Lämmler C, Eisenberg T, Plötz M, Abdulmawjood A. Studies on Trueperella pyogenes isolated from an okapi (Okapia johnstoni) and a royal python (Python regius). BMC Vet Res 2020; 16:292. [PMID: 32795301 PMCID: PMC7427953 DOI: 10.1186/s12917-020-02508-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 08/03/2020] [Indexed: 11/18/2022] Open
Abstract
Background The present study was designed to characterize phenotypically and genotypically two Trueperella pyogenes strains isolated from an okapi (Okapia johnstoni) and a royal python (Python regius). Case presentation The species identity could be confirmed by phenotypic properties, by MALDI-TOF MS analysis and by detection of T. pyogenes chaperonin-encoding gene cpn60 with a previously developed loop-mediated isothermal amplification (LAMP) assay. Furthermore, sequencing of the 16S ribosomal RNA (rRNA) gene, the 16S-23S rDNA intergenic spacer region (ISR), the target genes rpoB encoding the β-subunit of bacterial RNA polymerase, tuf encoding elongation factor tu and plo encoding the putative virulence factor pyolysin allowed the identification of both T. pyogenes isolates at species level. Conclusions Both strains could be clearly identified as T. pyogenes. The T. pyogenes strain isolated in high number from the vaginal discharge of an okapi seems to be of importance for the infectious process; the T. pyogenes strain from the royal python could be isolated from an apparently non-infectious process. However, both strains represent the first isolation of T. pyogenes from these animal species.
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Affiliation(s)
- Marwa F E Ahmed
- Hygiene and Zoonoses Department, Faculty of Veterinary Medicine, Mansoura University, Elgomhoria Street 60, 35516, Mansoura, Egypt
| | - Mazen Alssahen
- Institut für Hygiene und Infektionskrankheiten der Tiere, Justus-Liebig-Universität Gießen, Frankfurterstraße 85-91, D-35392, Gießen, Germany
| | - Christoph Lämmler
- Institut für Hygiene und Infektionskrankheiten der Tiere, Justus-Liebig-Universität Gießen, Frankfurterstraße 85-91, D-35392, Gießen, Germany
| | - Tobias Eisenberg
- Landesbetrieb Hessisches Landeslabor (LHL), Schubertstraße 60, D-35392, Gießen, Germany
| | - Madeleine Plötz
- Institute of Food Quality and Food Safety, Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Bischofsholer Damm 15, D-30173, Hannover, Germany
| | - Amir Abdulmawjood
- Institute of Food Quality and Food Safety, Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Bischofsholer Damm 15, D-30173, Hannover, Germany.
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Kwiecień E, Stefańska I, Chrobak-Chmiel D, Sałamaszyńska-Guz A, Rzewuska M. New Determinants of Aminoglycoside Resistance and Their Association with the Class 1 Integron Gene Cassettes in Trueperella pyogenes. Int J Mol Sci 2020; 21:E4230. [PMID: 32545831 PMCID: PMC7352783 DOI: 10.3390/ijms21124230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/07/2020] [Accepted: 06/11/2020] [Indexed: 12/15/2022] Open
Abstract
Trueperella pyogenes is an important opportunistic animal pathogen. Different antimicrobials, including aminoglycosides, are used to treat T. pyogenes infections. The aim of the present study was to evaluate aminoglycoside susceptibility and to detect aminoglycoside resistance determinants in 86 T. pyogenes isolates of different origin. Minimum inhibitory concentration of gentamicin, streptomycin, and kanamycin was determined using a standard broth microdilution method. Genetic elements associated with aminoglycoside resistance were investigated by PCR and DNA sequencing. All studied isolates were susceptible to gentamicin, but 32.6% and 11.6% of them were classified as resistant to streptomycin and kanamycin, respectively. A total of 30 (34.9%) isolates contained class 1 integrons. Class 1 integron gene cassettes carrying aminoglycoside resistance genes, aadA11 and aadA9, were found in seven and two isolates, respectively. Additionally, the aadA9 gene found in six isolates was not associated with mobile genetic elements. Moreover, other, not carried by gene cassettes, aminoglycoside resistance genes, strA-strB and aph(3')-IIIa, were also detected. Most importantly, this is the first description of all reported genes in T. pyogenes. Nevertheless, the relevance of the resistance phenotype to genotype was not perfectly matched in 14 isolates. Therefore, further investigations are needed to fully explain aminoglycoside resistance mechanisms in T. pyogenes.
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Affiliation(s)
| | | | | | | | - Magdalena Rzewuska
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8 St., 02-786 Warsaw, Poland; (E.K.); (I.S.); (D.C.-C.); (A.S.-G.)
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Evaluation of the Potency of Two Pyolysin-Derived Recombinant Proteins as Vaccine Candidates of Trueperella Pyogenes in a Mouse Model: Pyolysin Oligomerization and Structural Change Affect the Efficacy of Pyolysin-Based Vaccines. Vaccines (Basel) 2020; 8:vaccines8010079. [PMID: 32050696 PMCID: PMC7157609 DOI: 10.3390/vaccines8010079] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 02/03/2020] [Accepted: 02/07/2020] [Indexed: 11/26/2022] Open
Abstract
Trueperella pyogenes (T. pyogenes) is an important opportunistic pathogen in livestock and wild animals. However, only one commercial T. pyogenes vaccine is currently available, and its immunoprotective effect is not ideal. Pyolysin (PLO) is one of the important virulence factors expressed by T. pyogenes and one of the targets for the development of new T. pyogenes vaccines. In this study, we constructed two recombinant antigens, tPLOA1 (contains amino acids 1–110 and domain 4 of the PLO molecule) and tPLOA2 (contains amino acids 190–296 and domain 4 of the PLO molecule). Vaccines were prepared by mixing the two recombinant antigens with incomplete Freund’s adjuvant or sheep red blood cell membrane and provided partial immune protection to immunized mice against the lethal challenge of T. pyogenes. Analysis of the PLO-specific IgG levels of immunized mice indicated that the antibody-inducing potency and immunoprotective efficacy of PLO-based vaccines are affected by the oligomerization and structural changes of PLO after binding to a cholesterol-containing membrane. In addition, the titer of anti-hemolysis antibodies is not a suitable indicator of the immunoprotective effect of these vaccines in PLO-based vaccine-immunized animals. The results provide new insights into the development of T. pyogenes vaccines.
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Galán-Relaño Á, Gómez-Gascón L, Barrero-Domínguez B, Luque I, Jurado-Martos F, Vela AI, Sanz-Tejero C, Tarradas C. Antimicrobial susceptibility of Trueperella pyogenes isolated from food-producing ruminants. Vet Microbiol 2020; 242:108593. [PMID: 32122597 DOI: 10.1016/j.vetmic.2020.108593] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 12/31/2019] [Accepted: 01/21/2020] [Indexed: 02/06/2023]
Abstract
A total of 96 Trueperella pyogenes isolates, an opportunistic pathogen of food-producing ruminants, obtained from cattle (n = 34), sheep (n = 35) and goats (n = 27), and identified by Real Time PCR (qPCR), were analysed to determine the susceptibility to 12 antimicrobials commonly used in livestock, using a broth microdilution. The Minimal Inhibitory Concentration (MIC) distribution was unimodal for half of the antimicrobials tested with the exception of apramycin, gentamicin, streptomycin, oxytetracycline, tylosin, and erythromycin all of which showed bimodal MIC distributions. Low MIC90 values for penicillin, amoxicillin, ceftiofur, enrofloxacin, and gentamicin (<1 μg/ml) were obtained, suggesting that these antimicrobials would be the most effective first line empiric treatment for T. pyogenes infections in livestock. Furthermore, according to the specific T. pyogenes breakpoints for penicillin, sulfamethoxazole/trimethoprim and erythromycin, 93.7 % of isolates were susceptible to penicillin and 77.2 % to erythromycin, whereas 92.7 % were non-susceptible to sulfamethoxazole/trimethoprim. Significant differences were observed in the MIC distribution of almost all antimicrobials, except enrofloxacin, tylosin and erythromycin against cattle, sheep or goat isolates, although all antimicrobials showed similar MIC90 values, except apramycin and oxytetracycline that showed higher values when tested against cattle isolates. These data provide interesting information on the antimicrobials of choice for the treatment of infections caused by T. pyogenes in ruminants.
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Affiliation(s)
- Ángela Galán-Relaño
- Animal Health Department, Veterinary Faculty, University of Cordoba, Campus of Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071, Cordoba, Spain
| | - Lidia Gómez-Gascón
- Animal Health Department, Veterinary Faculty, University of Cordoba, Campus of Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071, Cordoba, Spain
| | | | - Inmaculada Luque
- Animal Health Department, Veterinary Faculty, University of Cordoba, Campus of Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071, Cordoba, Spain.
| | | | - Ana I Vela
- VISAVET Health Surveillance Centre, Complutense University, Avenida de Puerta de Hierro s/n, 28040, Madrid, Spain
| | - Celia Sanz-Tejero
- Microbiology Department EXOPOL, S.L. Pol. Río Gállego, D/8 50840, San Mateo de Gállego (Zaragoza), Spain
| | - Carmen Tarradas
- Animal Health Department, Veterinary Faculty, University of Cordoba, Campus of Rabanales, 'International Excellence Agrifood Campus, CeiA3', 14071, Cordoba, Spain
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