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de Araújo LCA, da Purificação-Júnior AF, da Silva SM, Lopes ACS, Veras DL, Alves LC, Dos Santos FB, Napoleão TH, Dos Santos Correia MT, da Silva MV, Oliva MLV, de Oliveira MBM. In vitro evaluation of mercury (Hg 2+) effects on biofilm formation by clinical and environmental isolates of Klebsiella pneumoniae. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:669-677. [PMID: 30500736 DOI: 10.1016/j.ecoenv.2018.11.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 11/05/2018] [Accepted: 11/09/2018] [Indexed: 06/09/2023]
Abstract
The increase in urbanization and industrialization has contributed to the contamination of different environments by means of xenobiotic compounds, such as heavy metals, causing changes in microbial communities. Among these metals, the Mercury (Hg2+) is one the most prevalent toxic metals for the environment The present study aimed to evaluate the effect of mercury on the formation of biofilm by environmental (collected from urban stream water) and clinical isolates of Klebsiella pneumoniae. In addition, antibiotic resistance, virulence factors, and genetic diversity were investigated. Taxonomic identity of eight isolates (one reference, two clinical, and five environmental isolates) was performed by MALDI-TOF-MS, while the antibiotic susceptibility profile was assessed by the disc diffusion method. The ability to form biofilms was evaluated by culture on Congo red agar and by crystal violet staining. Biofilm structure was analyzed by scanning electron microscopy. The hydrophobicity profile and the presence of the virulence genes cps, fimH, and mrkD was investigated. The presence of merA and its relationship with antimicrobial resistance were also assessed. The identity of all isolates was confirmed by MALDI-TOF-MS, and different profiles of resistance to mercury and antibiotics as well as of biofilm formation were identified for the clinical and environmental isolates. All isolates were hydrophilic and positive for the virulence genes cps, fimH, and mrkD; only the clinical isolate K36-A2 was positive for merA. The diversity of the isolates was confirmed by ERIC-PCR, which revealed high heterogeneity among the isolates. In conclusion, the data demonstrate that the investigated isolates present different responses to exposure to Hg2+ and correspond to distinct populations of K. pneumoniae disseminated in the investigated environment. The data obtained in this work will aid in understanding the mechanisms of survival of this pathogen under adverse conditions.
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Affiliation(s)
| | | | - Sivoneide Maria da Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Pernambuco, Brazil
| | - Ana Catarina Souza Lopes
- Departamento de Medicina Tropical, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Pernambuco, Brazil
| | - Dyana Leal Veras
- Departamento de Parasitologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, Pernambuco, Brazil
| | - Luiz Carlos Alves
- Departamento de Parasitologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, Pernambuco, Brazil
| | - Fábio Brayner Dos Santos
- Departamento de Parasitologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, Pernambuco, Brazil
| | - Thiago Henrique Napoleão
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Pernambuco, Brazil
| | | | - Márcia Vanusa da Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Pernambuco, Brazil
| | - Maria Luiza Vilela Oliva
- Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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Chen FJ, Chan CH, Huang YJ, Liu KL, Peng HL, Chang HY, Liou GG, Yew TR, Liu CH, Hsu KY, Hsu L. Structural and mechanical properties of Klebsiella pneumoniae type 3 Fimbriae. J Bacteriol 2011; 193:1718-25. [PMID: 21239584 PMCID: PMC3067671 DOI: 10.1128/jb.01395-10] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 01/06/2011] [Indexed: 11/20/2022] Open
Abstract
This study investigated the structural and mechanical properties of Klebsiella pneumoniae type 3 fimbriae, which constitute a known virulence factor for the bacterium. Transmission electron microscopy and optical tweezers were used to understand the ability of the bacterium to survive flushes. An individual K. pneumoniae type 3 fimbria exhibited a helix-like structure with a pitch of 4.1 nm and a three-phase force-extension curve. The fimbria was first nonlinearly stretched with increasing force. Then, it started to uncoil and extended several micrometers at a fixed force of 66 ± 4 pN (n = 22). Finally, the extension of the fimbria shifted to the third phase, with a characteristic force of 102 ± 9 pN (n = 14) at the inflection point. Compared with the P fimbriae and type 1 fimbriae of uropathogenic Escherichia coli, K. pneumoniae type 3 fimbriae have a larger pitch in the helix-like structure and stronger uncoiling and characteristic forces.
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Affiliation(s)
- Feng-Jung Chen
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Chia-Han Chan
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Ying-Jung Huang
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Kuo-Liang Liu
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Hwei-Ling Peng
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Hwan-You Chang
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Gunn-Guang Liou
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Tri-Rung Yew
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Cheng-Hsien Liu
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Ken Y. Hsu
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
| | - Long Hsu
- Institute and Department of Electrophysics, Department of Photonics and Institute of Electro-Optical Engineering, Department of Biological Science and Technology, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan, Republic of China, Department of Materials Science and Engineering, Institute of Molecular Medicine and Department of Life Sciences, Department of Power Mechanical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan, Republic of China, Division of Molecular and Genomic Medicine, National Health Research Institutes, 35 Keyan Road, Jhunan, Miaoli County 350, Taiwan, Republic of China
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