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Vieira T, Dos Santos CA, de Jesus Bertani AM, Costa GL, Campos KR, Sacchi CT, Cunha MPV, Carvalho E, da Costa AJ, de Paiva JB, Rubio MDS, Camargo CH, Tiba-Casas MR. Polymyxin Resistance in Salmonella: Exploring Mutations and Genetic Determinants of Non-Human Isolates. Antibiotics (Basel) 2024; 13:110. [PMID: 38391496 PMCID: PMC10885896 DOI: 10.3390/antibiotics13020110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/19/2024] [Accepted: 01/21/2024] [Indexed: 02/24/2024] Open
Abstract
Until 2015, polymyxin resistance was primarily attributed to chromosomal mutations. However, with the first report of mobile colistin resistance (mcr-1) in commensal Escherichia coli from food animals in China, the landscape has changed. To evaluate the presence of polymyxin resistance in Salmonella spp., a drop screening test for colistin and polymyxin B was carried out on 1156 isolates of non-human origin (animals, food, and the environment), received in Brazil, between 2016 and 2021. Subsequently, 210 isolates with resistant results in the drop test were subjected to the gold-standard test (broth microdilution) for both colistin and polymyxin B. Whole-genome sequencing (WGS) of 102 resistant isolates was performed for a comprehensive analysis of associated genes. Surprisingly, none of the isolates resistant to colistin in the drop test harbored any of the mcr variants (mcr-1 to mcr-10). WGS identified that the most common mutations were found in pmrA (n= 22; T89S) and pmrB (n = 24; M15T, G73S, V74I, I83A, A111V). Other resistance determinants were also detected, such as the aac(6')-Iaa gene in 72 isolates, while others carried beta-lactamase genes (blaTEM-1blaCTX-M-2, blaCMY-2). Additionally, genes associated with fluoroquinolone resistance (qnrB19, qnrS1, oqxA/B) were detected in 11 isolates. Colistin and polymyxin B resistance were identified among Salmonella from non-human sources, but not associated with the mcr genes. Furthermore, the already-described mutations associated with polymyxin resistance were detected in only a small number of isolates, underscoring the need to explore and characterize unknown genes that contribute to resistance.
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Affiliation(s)
- Thais Vieira
- Adolfo Lutz Institute, São Paulo 01246-000, SP, Brazil
| | | | | | | | | | | | | | | | | | | | - Marcela da Silva Rubio
- School of Agriculture and Veterinarian Sciences, University of the State of São Paulo, Jaboticabal 14884-900, SP, Brazil
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Dos Santos CA, Cunha MPV, Bertani AMDJ, de Almeida EA, Gonçalves CR, Sacchi CT, de Paiva JB, Camargo CH, Tiba-Casas MR. Detection of multidrug- and colistin-resistant Salmonella Choleraesuis causing bloodstream infection. J Antimicrob Chemother 2021; 75:2009-2010. [PMID: 32155258 DOI: 10.1093/jac/dkaa076] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Soares FB, Camargo CH, Cunha MPV, de Almeida EA, Bertani AMDJ, Carvalho ED, de Paiva JB, Fernandes SA, Tiba-Casas MR. Co-occurrence of qnrE1 and blaCTX-M-8 in IncM1 transferable plasmids contributing to MDR in different Salmonella serotypes. J Antimicrob Chemother 2020; 74:1155-1156. [PMID: 30541085 DOI: 10.1093/jac/dky516] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Soares FB, Camargo CH, Cunha MPV, de Almeida EA, Bertani AMDJ, de Carvalho E, de Paiva JB, Fernandes SA, Tiba-Casas MR. Subtyping of plasmid-mediated quinolone resistance among Salmonella serotypes by whole genome sequencing. Diagn Microbiol Infect Dis 2019; 94:403-406. [PMID: 30955894 DOI: 10.1016/j.diagmicrobio.2019.02.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/30/2019] [Accepted: 02/13/2019] [Indexed: 10/27/2022]
Abstract
Most known plasmids are identified by conferring virulence or antimicrobial resistance phenotypes and such characteristics aid in the success of the dispersion of different plasmid types between bacteria from different sources. This study aimed to perform the subtyping of the plasmid-mediated quinolone resistance, detected in Salmonella spp. A total of 34 Salmonella strains non-susceptible to ciprofloxacin were evaluated. Strains were selected based on the presence of PMQR determined by Polymerase Chain Reaction and further submitted to Next Generation Sequencing. Most of the strains presented the qnrB19 in small ColE-like plasmids and qnrB2 gene associated with IncN/ST5 plasmids also detected. Our results indicated the co-occurrence of PMQR and ESBLs in plasmids that are a lineage of epidemic plasmids circulating in Salmonella in which additional resistances were detected, highlighting the potential threat of resistance Salmonella to public health, particularly in infections in which antimicrobial therapy is needed.
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de Paiva JB, da Silva LPM, Casas MRT, Conceição RA, Nakazato G, de Pace F, Sperandio V, da Silveira WD. In vivoinfluence ofin vitroup-regulated genes in the virulence of an APEC strain associated with swollen head syndrome. Avian Pathol 2016; 45:94-105. [DOI: 10.1080/03079457.2015.1125995] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Pilatti L, Boldrin de Paiva J, Rojas TCG, Leite JL, Conceição RA, Nakazato G, Dias da Silveira W. The virulence factor ychO has a pleiotropic action in an Avian Pathogenic Escherichia coli (APEC) strain. BMC Microbiol 2016; 16:35. [PMID: 26965678 PMCID: PMC4787180 DOI: 10.1186/s12866-016-0654-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 03/02/2016] [Indexed: 02/04/2023] Open
Abstract
Background Avian pathogenic Escherichia coli strains cause extraintestinal diseases in birds, leading to substantial economic losses to the poultry industry worldwide. Bacteria that invade cells can overcome the host humoral immune response, resulting in a higher pathogenicity potential. Invasins are members of a large family of outer membrane proteins that allow pathogen invasion into host cells by interacting with specific receptors on the cell surface. Results An in silico analysis of the genome of a septicemic APEC strain (SEPT362) demonstrated the presence of a putative invasin homologous to the ychO gene from E. coli str. K-12 substr. MG1655. In vitro and in vivo assays comparing a mutant strain carrying a null mutation of this gene, a complemented strain, and its counterpart wild-type strain showed that ychO plays a role in the pathogenicity of APEC strain SEPT362. In vitro assays demonstrated that the mutant strain exhibited significant decreases in bacterial adhesiveness and invasiveness in chicken cells and biofilm formation. In vivo assay indicated a decrease in pathogenicity of the mutant strain. Moreover, transcriptome analysis demonstrated that the ychO deletion affected the expression of 426 genes. Among the altered genes, 93.66 % were downregulated in the mutant, including membrane proteins and metabolism genes. Conclusion The results led us to propose that gene ychO contributes to the pathogenicity of APEC strain SEPT362 influencing, in a pleiotropic manner, many biological characteristics, such as adhesion and invasion of in vitro cultured cells, biofilm formation and motility, which could be due to the possible membrane location of this protein. All of these results suggest that the absence of gene ychO would influence the virulence of the APEC strain herein studied.
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Affiliation(s)
- Livia Pilatti
- Department of Genetics, Evolution and Bioagents, Institute of Biology (P.O.Box: 6109), State University of Campinas - UNICAMP (ZIP Code 13083-970), Campinas, São Paulo, Brazil
| | - Jacqueline Boldrin de Paiva
- Department of Genetics, Evolution and Bioagents, Institute of Biology (P.O.Box: 6109), State University of Campinas - UNICAMP (ZIP Code 13083-970), Campinas, São Paulo, Brazil
| | - Thaís Cabrera Galvão Rojas
- Department of Genetics, Evolution and Bioagents, Institute of Biology (P.O.Box: 6109), State University of Campinas - UNICAMP (ZIP Code 13083-970), Campinas, São Paulo, Brazil
| | - Janaína Luisa Leite
- Department of Genetics, Evolution and Bioagents, Institute of Biology (P.O.Box: 6109), State University of Campinas - UNICAMP (ZIP Code 13083-970), Campinas, São Paulo, Brazil
| | - Rogério Arcuri Conceição
- Department of Genetics, Evolution and Bioagents, Institute of Biology (P.O.Box: 6109), State University of Campinas - UNICAMP (ZIP Code 13083-970), Campinas, São Paulo, Brazil
| | - Gerson Nakazato
- Department of Microbiology, Center of Biological Sciences, State University of Londrina (UEL), Londrina, Paraná, Brazil
| | - Wanderley Dias da Silveira
- Department of Genetics, Evolution and Bioagents, Institute of Biology (P.O.Box: 6109), State University of Campinas - UNICAMP (ZIP Code 13083-970), Campinas, São Paulo, Brazil.
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de Paiva JB, Leite JL, da Silva LPM, Rojas TCG, de Pace F, Conceição RA, Sperandio V, da Silveira WD. Influence of the major nitrite transporter NirC on the virulence of a Swollen Head Syndrome avian pathogenic E. coli (APEC) strain. Vet Microbiol 2014; 175:123-31. [PMID: 25487442 DOI: 10.1016/j.vetmic.2014.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 11/13/2014] [Accepted: 11/18/2014] [Indexed: 12/21/2022]
Abstract
Avian Pathogenic Escherichia coli (APEC) strains are extra-intestinal E. coli that infect poultry and cause diseases. Nitrite is a central branch-point in bacterial nitrogen metabolism and is used as a cytotoxin by macrophages. Unlike nitric oxide (NO), nitrite cannot diffuse across bacterial membrane cells. The NirC protein acts as a specific channel to facilitate the transport of nitrite into Salmonella and E. coli cells for nitrogen metabolism and cytoplasmic detoxification. NirC is also required for the pathogenicity of Salmonella by downregulating the production of NO by the host macrophages. Based on an in vitro microarray that revealed the overexpression of the nirC gene in APEC strain SCI-07, we constructed a nirC-deficient SCI-07 strain (ΔnirC) and evaluated its virulence potential using in vivo and in vitro assays. The final cumulative mortalities caused by mutant and wild-type (WT) were similar; while the ΔnirC caused a gradual increase in the mortality rate during the seven days recorded, the WT caused mortality up to 24h post-infection (hpi). Counts of the ΔnirC cells in the spleen, lung and liver were higher than those of the WT after 48 hpi but similar at 24 hpi. Although similar number of ΔnirC and WT cells was observed in macrophages at 3 hpi, there was higher number of ΔnirC cells at 16 hpi. The cell adhesion ability of the ΔnirC strain was about half the WT level in the presence and absence of alpha-D-mannopyranoside. These results indicate that the nirC gene influences the pathogenicity of SCI-07 strain.
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Affiliation(s)
- Jacqueline Boldrin de Paiva
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas-UNICAMP, PO Box 6109, Campinas, SP, Brazil.
| | - Janaína Luisa Leite
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas-UNICAMP, PO Box 6109, Campinas, SP, Brazil
| | - Livia Pilatti Mendes da Silva
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas-UNICAMP, PO Box 6109, Campinas, SP, Brazil
| | - Thais Cabrera Galvão Rojas
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas-UNICAMP, PO Box 6109, Campinas, SP, Brazil
| | - Fernanda de Pace
- Department of Clinical Medicine, Faculty of Medical Sciences, State University of Campinas-UNICAMP, Campinas, SP, Brazil
| | - Rogério Arcuri Conceição
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas-UNICAMP, PO Box 6109, Campinas, SP, Brazil
| | - Vanessa Sperandio
- University of Texas Southwestern Medical Center, Dallas, TX 75390-9048, USA
| | - Wanderley Dias da Silveira
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas-UNICAMP, PO Box 6109, Campinas, SP, Brazil.
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Maluta RP, Gatti MSV, Joazeiro PP, de Paiva JB, Rojas TCG, Silveira F, Houle S, Kobayashi RKT, Dozois CM, Dias da Silveira W. Avian ExtraintestinalEscherichia coliExhibits Enterotoxigenic-Like Activity in theIn VivoRabbit Ligated Ileal Loop Assay. Foodborne Pathog Dis 2014; 11:484-9. [DOI: 10.1089/fpd.2013.1719] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Renato Pariz Maluta
- Bacterial Molecular Biology Laboratory, Department of Genetics, Evolution, and Bioagents, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Maria Silvia Viccari Gatti
- Bacterial Molecular Biology Laboratory, Department of Genetics, Evolution, and Bioagents, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Paulo Pinto Joazeiro
- Department of Histology, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Jacqueline Boldrin de Paiva
- Bacterial Molecular Biology Laboratory, Department of Genetics, Evolution, and Bioagents, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Thaís Cabrera Galvão Rojas
- Bacterial Molecular Biology Laboratory, Department of Genetics, Evolution, and Bioagents, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Flávio Silveira
- Bacterial Molecular Biology Laboratory, Department of Genetics, Evolution, and Bioagents, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Sébastien Houle
- Institut National de la Recherche Scientifique (INRS)–Institut Armand-Frappier, Laval, Québec, Canada
| | | | - Charles M. Dozois
- Department of Microbiology, Biological Sciences Center, State University of Londrina (UEL), Londrina, Paraná, Brazil
| | - Wanderley Dias da Silveira
- Bacterial Molecular Biology Laboratory, Department of Genetics, Evolution, and Bioagents, Biology Institute, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
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Mobilon C, Augusto Szymanski de Toledo M, Laroza Paganelli F, Aparecido dos Santos C, de Pace F, Boldrin de Paiva J, Guedes Stehling E, Nakazato G, Gambaro Balieiro A, Pereira da Silva Airoldi F, de Assis Machado Reis F, Dias da Silveira W. Cloning and Purification of IpaC Antigen from Shigella flexneri: Proposal of a New Methodology. Protein Pept Lett 2012. [DOI: 10.2174/0929866511320020003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mobilon C, de Toledo MAS, Paganelli FL, dos Santos CA, de Pace F, de Paiva JB, Stehling EG, Nakazato G, Balieiro AG, Airoldi FPDS, Reis FDAM, da Silveira WD. Cloning and purification of IpaC antigen from Shigella flexneri: proposal of a new methodology. Protein Pept Lett 2012; 20:133-9. [PMID: 22894716 DOI: 10.2174/092986613804725316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 06/01/2012] [Accepted: 06/01/2012] [Indexed: 11/22/2022]
Abstract
Shigella flexneri is a Gram-negative bacillus that is responsible for a severe form of dysentery called Shigellosis, which mainly affects children and the elderly in both underdeveloped and developed countries. Pathogenic S. flexneri strains possess a large virulence plasmid that codes for effector proteins that are required for the entry and spread of the bacteria into colonocytes. Among these proteins is the translocator IpaC, which plays an important role in the invasion process; IpaC is implicated in pore formation in the host cell membrane and induces cytoskeletal rearrangements in macrophages and epithelial cells, thereby promoting bacterial entry. The ability of IpaC to insert onto the plasma membrane is due to a large nonpolar region of the protein structure. This characteristic also renders difficulties in recovery and purification when the protein is expressed in E. coli. Several works have considered different methodologies for the improved production and purification of IpaC. Herein, we propose an alternative method that is based on changes in the induction temperature and extraction buffer to facilitate the accumulation of high yields of soluble proteins for their further processing and ultimate use in biotechnological approaches.
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Affiliation(s)
- Cristiane Mobilon
- Department of Genetics, Evolution and Bioagents, State University of Campinas, Campinas, SP, Brazil
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Paiva JBD, Penha Filho RAC, Berchieri Junior A, Lemos MVF. Requirement for cobalamin by Salmonella enterica serovars Typhimurium, Pullorum, Gallinarum and Enteritidis during infection in chickens. Braz J Microbiol 2011. [DOI: 10.1590/s1517-83822011000400024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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de Pace F, Boldrin de Paiva J, Nakazato G, Lancellotti M, Sircili MP, Guedes Stehling E, Dias da Silveira W, Sperandio V. Characterization of IcmF of the type VI secretion system in an avian pathogenic Escherichia coli (APEC) strain. Microbiology (Reading) 2011. [PMID: 21778203 DOI: 10.1099/mic.0.050005–0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The intracellular multiplication factor (IcmF) protein is a component of the recently described type VI secretion system (T6SS). IcmF has been shown to be required for intra-macrophage replication and inhibition of phagosome-lysosome fusion in Legionella pneumophila. In Vibrio cholerae it is involved in motility, adherence and conjugation. Given that we previously reported that two T6SS genes (hcp and clpV) contribute to the pathogenesis of a septicaemic strain (SEPT362) of avian pathogenic Escherichia coli (APEC), we investigated the function of IcmF in this strain. Further elucidation of the virulence mechanisms of APEC is important because this pathogen is responsible for financial losses in the poultry industry, and is closely related to human extraintestinal pathogenic E. coli (ExPEC) strains, representing a potential zoonotic risk, as well as serving as a reservoir of virulence genes. Here we show that an APEC icmF mutant has decreased adherence to and invasion of epithelial cells, as well as decreased intra-macrophage survival. The icmF mutant is also defective for biofilm formation on abiotic surfaces. Additionally, expression of the flagella operon is decreased in the icmF mutant, leading to decreased motility. The combination of these phenotypes culminates in this mutant being altered for infection in chicks. These results suggest that IcmF in APEC may play a role in disease, and potentially also in the epidemiological spread of this pathogen through enhancement of biofilm formation.
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Affiliation(s)
- Fernanda de Pace
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | - Jacqueline Boldrin de Paiva
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | | | - Marcelo Lancellotti
- Department of Biochemistry, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | | | - Eliana Guedes Stehling
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | - Wanderley Dias da Silveira
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | - Vanessa Sperandio
- University of Texas Southwestern Medical Center, Dallas, TX 75390-9048, USA
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de Pace F, Boldrin de Paiva J, Nakazato G, Lancellotti M, Sircili MP, Guedes Stehling E, Dias da Silveira W, Sperandio V. Characterization of IcmF of the type VI secretion system in an avian pathogenic Escherichia coli (APEC) strain. Microbiology (Reading) 2011; 157:2954-2962. [PMID: 21778203 DOI: 10.1099/mic.0.050005-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The intracellular multiplication factor (IcmF) protein is a component of the recently described type VI secretion system (T6SS). IcmF has been shown to be required for intra-macrophage replication and inhibition of phagosome-lysosome fusion in Legionella pneumophila. In Vibrio cholerae it is involved in motility, adherence and conjugation. Given that we previously reported that two T6SS genes (hcp and clpV) contribute to the pathogenesis of a septicaemic strain (SEPT362) of avian pathogenic Escherichia coli (APEC), we investigated the function of IcmF in this strain. Further elucidation of the virulence mechanisms of APEC is important because this pathogen is responsible for financial losses in the poultry industry, and is closely related to human extraintestinal pathogenic E. coli (ExPEC) strains, representing a potential zoonotic risk, as well as serving as a reservoir of virulence genes. Here we show that an APEC icmF mutant has decreased adherence to and invasion of epithelial cells, as well as decreased intra-macrophage survival. The icmF mutant is also defective for biofilm formation on abiotic surfaces. Additionally, expression of the flagella operon is decreased in the icmF mutant, leading to decreased motility. The combination of these phenotypes culminates in this mutant being altered for infection in chicks. These results suggest that IcmF in APEC may play a role in disease, and potentially also in the epidemiological spread of this pathogen through enhancement of biofilm formation.
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Affiliation(s)
- Fernanda de Pace
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | - Jacqueline Boldrin de Paiva
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | | | - Marcelo Lancellotti
- Department of Biochemistry, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | | | - Eliana Guedes Stehling
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | - Wanderley Dias da Silveira
- Department of Genetics, Evolution and Bioagents, Institute of Biology, State University of Campinas - Unicamp, Campinas, SP CP6109, Brazil
| | - Vanessa Sperandio
- University of Texas Southwestern Medical Center, Dallas, TX 75390-9048, USA
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Penha Filho RAC, de Paiva JB, Arguello YMS, da Silva MD, Gardin Y, Resende F, Berchieri Junior AB, Sesti L. Efficacy of several vaccination programmes in commercial layer and broiler breeder hens against experimental challenge with Salmonella enterica serovar Enteritidis. Avian Pathol 2010; 38:367-75. [PMID: 19937524 DOI: 10.1080/03079450903183645] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Two experiments were performed to evaluate the protective effect of various vaccination combinations given at 5 and 9 weeks of age against experimental challenge with Salmonella enterica serovar Enteritidis (SE) phage type 4 at 12 weeks of age. In Experiment 1, groups of commercial layers were vaccinated by one of the following programmes: Group 1, two doses of a SE bacterin (Layermune SE); Group 2, one dose of a live Salmonella enterica serovar Gallinarum vaccine (Cevac SG9R) followed by one dose of the SE bacterin; Group 3, one dose of each of two different multivalent inactivated vaccines containing SE cells (Corymune 4K and Corymune 7K; and Group 4, unvaccinated, challenged controls. In Experiment 2, groups of broiler breeders were vaccinated by the same programmes as Groups 1 and 2 above while Group 3 was an unvaccinated, challenged control group. All vaccination programmes and the challenge induced significant (P < 0.05) seroconversion as measured by enzyme-linked immunosorbent assay. Overall, in both experiments, all vaccination schemes were significantly effective in reducing organ (spleen, liver and caeca) colonization by the challenge strain as well as reducing faecal excretion for at least 3 weeks. Vaccinated layers in Groups 1 and 2 and broiler breeders in Group 2 showed the greatest reduction in organ colonization and the least faecal excretion. In Experiment 1, layers vaccinated with multivalent inactivated vaccines containing a SE component (Group 3) were only moderately protected, indicating that such a vaccination programme may be useful in farms with good husbandry and housing conditions and low environmental infectious pressure by Salmonella.
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Paiva JBD, Penha Filho RAC, Arguello YMS, Berchieri Junior Â, Lemos MVF, Barrow PA. A defective mutant of Salmonella enterica Serovar Gallinarum in cobalamin biosynthesis is avirulent in chickens. Braz J Microbiol 2009. [DOI: 10.1590/s1517-83822009000300012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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de Paiva JB, Penha Filho RAC, Arguello YMS, Berchieri Junior A, Lemos MVF, Barrow PA. A defective mutant of Salmonella enterica Serovar Gallinarum in cobalamin biosynthesis is avirulent in chickens. Braz J Microbiol 2009; 40:495-504. [PMID: 24031393 PMCID: PMC3768534 DOI: 10.1590/s1517-838220090003000012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 02/11/2009] [Accepted: 05/03/2009] [Indexed: 11/21/2022] Open
Abstract
Salmonella enterica serovar Gallinarum (SG) is a fowl typhoid agent in chickens and is a severe disease with worldwide economic impact as its mortality may reach up to 80%. It is one of a small group of serovars that typically produces typhoid-like infections in a narrow range of host species and which therefore represents a good model for human typhoid. The survival mechanisms are not considered to be virulent mechanisms but are essential for the life of the bacterium. Mutants of Salmonella Gallinarum containing defective genes, related to cobalamin biosynthesis and which Salmonella spp. has to be produced to survive when it is in an anaerobic environment, were produced in this study. Salmonella Gallinarum is an intracellular parasite. Therefore, this study could provide information about whether vitamin B12 biosynthesis might be essential to its survival in the host. The results showed that the singular deletion in cbiA or cobS genes did not interfere in the life of Salmonella Gallinarum in the host, perhaps because single deletion is not enough to impede vitamin B12 biosynthesis. It was noticed that diluted SG mutants with single deletion produced higher mortality than the wild strain of SG. When double mutation was carried out, the Salmonella Gallinarum mutant was unable to provoke mortality in susceptible chickens. This work showed that B12 biosynthesis is a very important step in the metabolism of Salmonella Gallinarum during the infection of the chickens. Further research on bacterium physiology should be carried out to elucidate the events described in this research and to assess the mutant as a vaccine strain.
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