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Fernandes Santos F, Barcelos Valiatti T, Valêncio A, Cardoso da Silva Ribeiro Á, Streling AP, Tardelli Gomes TA, Cayô R, Gales AC. Unveiling novel threats: Urban river isolation of Aeromonas veronii with unusual VEB-28 extended-spectrum β-lactamase and distinct mcr variants. Chemosphere 2024; 357:141918. [PMID: 38614394 DOI: 10.1016/j.chemosphere.2024.141918] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/15/2024]
Abstract
Aeromonas spp. are frequently encountered in aquatic environments, with Aeromonas veronii emerging as an opportunistic pathogen causing a range of diseases in both humans and animals. Recent reports have raised public health concerns due to the emergence of multidrug-resistant Aeromonas spp. This is particularly noteworthy as these species have demonstrated the ability to acquire and transmit antimicrobial resistance genes (ARGs). In this study, we report the genomic and phenotypic characteristics of the A. veronii TR112 strain, which harbors a novel variant of the Vietnamese Extended-spectrum β-lactamase-encoding gene, blaVEB-28, and two mcr variants recovered from an urban river located in the Metropolitan Region of São Paulo, Brazil. A. veronii TR112 strain exhibited high minimum inhibitory concentrations (MICs) for ceftazidime (64 μg/mL), polymyxin (8 μg/mL), and ciprofloxacin (64 μg/mL). Furthermore, the TR112 strain demonstrated adherence to HeLa and Caco-2 cells within 3 h, cytotoxicity to HeLa cells after 24 h of interaction, and high mortality rates to the Galleria mellonella model. Genomic analysis showed that the TR112 strain belongs to ST257 and presented a range of ARGs conferring resistance to β-lactams (blaVEB-28, blaCphA3, blaOXA-912) and polymyxins (mcr-3 and mcr-3.6). Additionally, we identified a diversity of virulence factor-encoding genes, including those encoding mannose-sensitive hemagglutinin (Msh) pilus, polar flagella, type IV pili, type II secretion system (T2SS), aerolysin (AerA), cytotoxic enterotoxin (Act), hemolysin (HlyA), hemolysin III (HlyIII), thermostable hemolysin (TH), and capsular polysaccharide (CPS). In conclusion, our findings suggest that A. veronii may serve as an environmental reservoir for ARGs and virulence factors, highlighting its importance as a potential pathogen in public health.
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Affiliation(s)
- Fernanda Fernandes Santos
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil.
| | - Tiago Barcelos Valiatti
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - André Valêncio
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Ághata Cardoso da Silva Ribeiro
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Ana Paula Streling
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil; Houston Methodist Research Institute, Infectious Disease Fellowship Program, Houston, TX, United States
| | - Tânia A Tardelli Gomes
- Universidade Federal de São Paulo (UNIFESP), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Rodrigo Cayô
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil; Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, SP, Brazil
| | - Ana Cristina Gales
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine. Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
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Valiatti TB, Streling AP, Cayô R, Santos FF, Almeida MS, Tonini MAL, Gales AC. Genomic analysis of a Pseudomonas aeruginosa strain harboring bla KPC-2 and bla OXA-129 belonging to high-risk clone ST235 in Brazil. J Glob Antimicrob Resist 2024:S2213-7165(24)00041-9. [PMID: 38428456 DOI: 10.1016/j.jgar.2024.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/26/2024] [Accepted: 02/19/2024] [Indexed: 03/03/2024] Open
Affiliation(s)
- Tiago Barcelos Valiatti
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo - SP, Brazil.
| | - Ana Paula Streling
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo - SP, Brazil
| | - Rodrigo Cayô
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo - SP, Brazil; Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema - SP, Brazil
| | - Fernanda Fernandes Santos
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo - SP, Brazil
| | - Myriam Santos Almeida
- Serviço de Infectologia, Hospital Universitário Cassiano Antônio de Moraes, Universidade Federal do Espírito Santo (UFES), Vitória - ES, Brazil
| | - Marco André Loureiro Tonini
- Laboratório de Microbiologia, Hospital Universitário Cassiano Antônio de Moraes, Universidade Federal do Espírito Santo (UFES), Vitória - ES, Brazil
| | - Ana Cristina Gales
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo - SP, Brazil
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Valiatti TB, Bessa-Neto FO, Santos FF, Silva RGB, Veiga R, Cassu-Corsi D, Moura TCF, Lobato ARF, Pignatari ACC, Souza CO, Brasiliense DM, Cayô R, Gales AC. Clonal dissemination of highly virulent Serratia marcescens strains producing KPC-2 in food-producing animals. One Health 2023; 17:100591. [PMID: 37388190 PMCID: PMC10302155 DOI: 10.1016/j.onehlt.2023.100591] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 06/17/2023] [Accepted: 06/20/2023] [Indexed: 07/01/2023] Open
Abstract
Serratia marcescens is a Gram-negative bacterium presenting intrinsic resistance to polymyxins that has emerged as an important human pathogen. Although previous studies reported the occurrence of multidrug-resistance (MDR) S. marcescens isolates in the nosocomial settings, herein, we described isolates of this extensively drug-resistant (XDR) species recovered from stool samples of food-producing animals in the Brazilian Amazon region. Three carbapenem-resistant S. marcescens strains were recovered from stool samples of poultry and cattle. Genetic similarity analysis showed that these strains belonged to the same clone. Whole-genome sequencing of a representative strain (SMA412) revealed a resistome composed of genes encoding resistance to β-lactams [blaKPC-2, blaSRT-2], aminoglycosides [aac(6')-Ib3, aac(6')-Ic, aph(3')-VIa], quinolones [aac(6')-Ib-cr], sulfonamides [sul2], and tetracyclines [tet(41)]. In addition, the analysis of the virulome demonstrated the presence of important genes involved in the pathogenicity of this species (lipBCD, pigP, flhC, flhD, phlA, shlA, and shlB). Our data demonstrate that food-animal production can act as reservoirs for MDR and virulent strains of S. marcescens.
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Affiliation(s)
- Tiago Barcelos Valiatti
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Francisco Ozório Bessa-Neto
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, SP, Brazil
| | - Fernanda Fernandes Santos
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Ramon Giovanni Brandão Silva
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, SP, Brazil
| | - Ruanita Veiga
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Dandara Cassu-Corsi
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Tuane Carolina Ferreira Moura
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Ciência, Tecnologia, Inovação e Insumos Estratégicos em Saúde (SCTIE), Ministério da Saúde, Ananindeua, PA, Brazil
| | - Amalia Raiana Fonseca Lobato
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Ciência, Tecnologia, Inovação e Insumos Estratégicos em Saúde (SCTIE), Ministério da Saúde, Ananindeua, PA, Brazil
| | - Antonio Carlos Campos Pignatari
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório Especial de Microbiologia Clínica (LEMC), Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
| | - Cintya Oliveira Souza
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Ciência, Tecnologia, Inovação e Insumos Estratégicos em Saúde (SCTIE), Ministério da Saúde, Ananindeua, PA, Brazil
| | - Danielle Murici Brasiliense
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Ciência, Tecnologia, Inovação e Insumos Estratégicos em Saúde (SCTIE), Ministério da Saúde, Ananindeua, PA, Brazil
| | - Rodrigo Cayô
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, SP, Brazil
| | - Ana Cristina Gales
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório Especial de Microbiologia Clínica (LEMC), Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, SP, Brazil
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Valencio A, da Silva MA, Santos FF, Polatto JM, Machado MMF, Piazza RMF, Gales AC. Capture ELISA for KPC Detection in Gram-Negative Bacilli: Development and Standardisation. Microorganisms 2023; 11:microorganisms11041052. [PMID: 37110475 PMCID: PMC10142090 DOI: 10.3390/microorganisms11041052] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 03/17/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
The detection of KPC-type carbapenemases is necessary for guiding appropriate antibiotic therapy and the implementation of antimicrobial stewardship and infection control measures. Currently, few tests are capable of differentiating carbapenemase types, restricting the lab reports to their presence or not. The aim of this work was to raise antibodies and develop an ELISA test to detect KPC-2 and its D179 mutants. The ELISA-KPC test was designed using rabbit and mouse polyclonal antibodies. Four different protocols were tested to select the bacterial inoculum with the highest sensitivity and specificity rates. The standardisation procedure was performed using 109 previously characterised clinical isolates, showing 100% of sensitivity and 89% of specificity. The ELISA-KPC detected all isolates producing carbapenemases, including KPC variants displaying the ESBL phenotype such as KPC-33 and -66.
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Affiliation(s)
- André Valencio
- Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
| | | | - Fernanda Fernandes Santos
- Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
| | | | - Marcelo Marcondes Ferreira Machado
- Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
| | | | - Ana Cristina Gales
- Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04039-032, Brazil
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Moses IB, Santos FF, Gales AC. Human Colonization and Infection by Staphylococcus pseudintermedius: An Emerging and Underestimated Zoonotic Pathogen. Microorganisms 2023; 11:microorganisms11030581. [PMID: 36985155 PMCID: PMC10057476 DOI: 10.3390/microorganisms11030581] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/19/2023] [Accepted: 02/21/2023] [Indexed: 03/03/2023] Open
Abstract
S. pseudintermedius is a known resident of the skin and mucous membranes and a constituent of the normal microbiota of dogs. It has also been recognized as an opportunistic and zoonotic pathogen that is able to colonize humans and cause severe diseases, especially in immunocompromised hosts. Most importantly, methicillin-resistant S. pseudintermedius (MRSP), which is intrinsically multidrug-resistant, has emerged with serious public health consequences. The epidemiological situation is further exacerbated with reports of its zoonotic transmission and human infections which have been mostly attributed to the increasing frequency of dog ownership and close contact between dogs and humans. Evidence on the zoonotic transmission of MRSP from pet dogs to humans (such as dog owners, small-animal veterinarians, and other people in close proximity to dogs) is limited, especially due to the misidentification of S. pseudintermedius as S. aureus. Despite this fact, reports on the increasing emergence and spread of MRSP in humans have been increasing steadily over the years since its first documented report in 2006 in Belgium. The emergence of MRSP strains has further compromised treatment outcomes in both veterinary and human medicine as these strains are resistant to beta-lactam antimicrobials usually prescribed as first line treatment. Frustratingly, the limited awareness and surveillance of the zoonotic transmission of S. pseudintermedius have underestimated their extent of transmission, prevalence, epidemiology, and public health significance. In order to fill this gap of information, this review focused on detailed reports on zoonotic transmission, human colonization, and infections by S. pseudintermedius, their pathogenic features, antimicrobial resistance profiles, epidemiology, risk factors, and treatment. In writing this review, we searched Web of Science, PubMed, and SCOPUS databases using the keyword “Staphylococcus pseudintermedius AND humans”. A phylogenetic tree to determine the genetic relatedness/diversity of publicly available genomes of S. pseudintermedius was also constructed.
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Affiliation(s)
- Ikechukwu Benjamin Moses
- Department of Internal Medicine, Division of Infectious Diseases, Escola Paulista de Medicina/Universidade Federal de São Paulo, Universidade Federal de São Paulo–UNIFESP, São Paulo 04039-032, Brazil
- Department of Applied Microbiology, Faculty of Sciences, Ebonyi State University, Abakaliki PMB 053, Nigeria
| | - Fernanda Fernandes Santos
- Department of Internal Medicine, Division of Infectious Diseases, Escola Paulista de Medicina/Universidade Federal de São Paulo, Universidade Federal de São Paulo–UNIFESP, São Paulo 04039-032, Brazil
| | - Ana Cristina Gales
- Department of Internal Medicine, Division of Infectious Diseases, Escola Paulista de Medicina/Universidade Federal de São Paulo, Universidade Federal de São Paulo–UNIFESP, São Paulo 04039-032, Brazil
- Correspondence:
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Ribeiro ACDS, Chikhani YCDSA, Valiatti TB, Valêncio A, Kurihara MNL, Santos FF, Minarini LADR, Gales AC. In Vitro and In Vivo Synergism of Fosfomycin in Combination with Meropenem or Polymyxin B against KPC-2-Producing Klebsiella pneumoniae Clinical Isolates. Antibiotics (Basel) 2023; 12:antibiotics12020237. [PMID: 36830148 PMCID: PMC9952190 DOI: 10.3390/antibiotics12020237] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/15/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Fosfomycin disodium is a potential therapeutic option to manage difficult-to-treat infections, especially when combined with other antimicrobials. In this study, we evaluated the activity of fosfomycin in combination with meropenem or polymyxin B against contemporaneous KPC-2-producing K. pneumoniae clinical isolates (KPC-KPN). Synergistic activity was assessed by checkerboard (CKA) and time-kill (TKA) assays. TKA was performed using serum peak and trough concentrations. The activity of these combinations was also assessed in the Galleria mellonella model. Biofilm disruption was assessed by the microtiter plate technique. CKA resulted in an 8- to 2048-fold decrease in meropenem MIC, restoring meropenem activity for 82.4% of the isolates when combined with fosfomycin. For the fosfomycin + polymyxin B combination, a 2- to 128-fold reduction in polymyxin B MIC was achieved, restoring polymyxin B activity for 47% of the isolates. TKA resulted in the synergism of fosfomycin + meropenem (3.0-6.7 log10 CFU/mL decrease) and fosfomycin + polymyxin B (6.0-6.2 log10 CFU/mL decrease) at peak concentrations. All larvae treated with fosfomycin + meropenem survived. Larvae survival rate was higher with fosfomycin monotherapy (95%) than that observed for fosfomycin + polymyxin B (75%) (p-value < 0.0001). Finally, a higher biofilm disruption was observed under exposure to fosfomycin + polymyxin B (2.4-3.4-fold reduction). In summary, we observed a synergistic effect of fosfomycin + meropenem and fosfomycin + polymyxin B combinations, in vitro and in vivo, against KPC-KPN, as well as biofilm disruption.
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Affiliation(s)
- Aghata Cardoso da Silva Ribeiro
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
- Correspondence:
| | - Yohanna Carvalho dos Santos Aoun Chikhani
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
| | - Tiago Barcelos Valiatti
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
| | - André Valêncio
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
| | - Mariana Neri Lucas Kurihara
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
| | - Fernanda Fernandes Santos
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
| | - Luciene Andrade da Rocha Minarini
- Laboratório Multidisciplinar em Saúde e Meio Ambiente, Departamento de Ciências Farmacêuticas, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
| | - Ana Cristina Gales
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo—UNIFESP, São Paulo 04039-032, Brazil
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Valiatti TB, Santos FF, Valêncio A, Cayô R, Gomes TAT, Gales AC. Genome sequencing of an XDR Klebsiella pneumoniae ST101 strain isolated from a Brazilian Amazon river. J Glob Antimicrob Resist 2022; 31:165-166. [PMID: 36064106 DOI: 10.1016/j.jgar.2022.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 08/10/2022] [Accepted: 08/27/2022] [Indexed: 01/02/2023] Open
Abstract
OBJECTIVE Herein, this study aimed to perform the genomic characterization of a blaKPC-2 positive Klebsiella pneumoniae (KP1.1JP) strain isolated from the surface water of river located the Brazilian Amazon region. METHODS Antimicrobial susceptibility testing was performed following BrCAST/EUCAST recommendations. Genomic DNA was extracted and sequenced using the Illumina® NextSeq platform and the assembly of the generated reads was performed using the SPAdes software. Research on the sequence type, resistance and virulence encoding genes, and plasmid replicon typing was carried out. RESULTS The KP1.1JP strain was resistant to all β-lactams, aminoglycosides, and fluoroquinolones tested. The genome size was 5 626 346 bp, distributed in 203 contigs and a guanine and cytosine content of 57.02%. The values of N50 and N75 were 285 583 bp and 173 927 bp, respectively. We verified that KP1.1JP belongs to ST101 and carries genes encoding resistance to β-lactams (blaCTX-M-15, blaTEM-1B, blaOXA-1, blaSVH-182, and blaKPC-2), aminoglycosides [aac(3')-IIa, aph(3')-Vla], fluoroquinolones [aac(6')-Ib-cr], phenicol (catA1, catA2, catB3), tetracycline [tet(D)], trimethoprim (dfrA14), and fosfomycin (fosA). Additionally, the following virulence encoding genes were also detected: mrkABCDFHIJ (Fimbria type 3); fimABCDRFGHIK (Fimbria type 1); entABCDEFS and fepABCDG (siderophores); iroN, irp1, and irp2 (salmochelins); fyuA and ybtAEPQSTUX (yersiniabactin); and iutA (aerobactin). CONCLUSIONS We report the occurrence of a K. pneumoniae ST101 strain carrying blaKPC-2 gene in an Amazon river in Brazil. The genomic characteristics of this strain will contribute to a better understanding of the spread of pathogens of clinical importance in the environment based on a One Health perspective.
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Affiliation(s)
- Tiago Barcelos Valiatti
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil.
| | - Fernanda Fernandes Santos
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - André Valêncio
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - Rodrigo Cayô
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil; Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmaciêuticas (ICAQF), Diadema, São Paulo, Brazil
| | - Tânia Aparecida Tardelli Gomes
- Universidade Federal de São Paulo (UNIFESP), Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), São Paulo 04023-062, Brazil
| | - Ana Cristina Gales
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil.
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Ribeiro ÁCDS, Santos FF, Moses IB, Minarini LADR, Gales AC. Sequencing of fosA: A Rapid and Inexpensive Method for Discriminating Klebsiella pneumoniae CC258 from Other Clones. Microb Drug Resist 2022; 28:1037-1042. [DOI: 10.1089/mdr.2022.0081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Ághata Cardoso da Silva Ribeiro
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Fernanda Fernandes Santos
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Ikechukwu Benjamin Moses
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
- Department of Applied Microbiology, Faculty of Science, Ebonyi State University, Abakaliki, Nigeria
| | - Luciene Andrade da Rocha Minarini
- Laboratório Multidisciplinar em Saúde e Meio Ambiente, Departamento de Ciências Farmacêuticas, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Diadema, São Paulo, Brazil
| | - Ana Cristina Gales
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
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de Carvalho FM, Valiatti TB, Santos FF, Silveira ACDO, Guimarães APC, Gerber AL, Souza CDO, Cassu Corsi D, Brasiliense DM, Castelo-Branco DDSCM, Anzai EK, Bessa-Neto FO, Guedes GMDM, de Souza GHDA, Lemos LN, Ferraz LFC, Bahia MDNM, Vaz MSM, da Silva RGB, Veiga R, Simionatto S, Monteiro WAP, Lima WADO, Kiffer CRV, Campos Pignatari AC, Cayô R, de Vasconcelos ATR, Gales AC. Exploring the Bacteriome and Resistome of Humans and Food-Producing Animals in Brazil. Microbiol Spectr 2022; 10:e0056522. [PMID: 35993730 PMCID: PMC9602611 DOI: 10.1128/spectrum.00565-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 07/03/2022] [Indexed: 12/30/2022] Open
Abstract
The epidemiology of antimicrobial resistance (AMR) is complex, with multiple interfaces (human-animal-environment). In this context, One Health surveillance is essential for understanding the distribution of microorganisms and antimicrobial resistance genes (ARGs). This report describes a multicentric study undertaken to evaluate the bacterial communities and resistomes of food-producing animals (cattle, poultry, and swine) and healthy humans sampled simultaneously from five Brazilian regions. Metagenomic analysis showed that a total of 21,029 unique species were identified in 107 rectal swabs collected from distinct hosts, the highest numbers of which belonged to the domain Bacteria, mainly Ruminiclostridium spp. and Bacteroides spp., and the order Enterobacterales. We detected 405 ARGs for 12 distinct antimicrobial classes. Genes encoding antibiotic-modifying enzymes were the most frequent, followed by genes related to target alteration and efflux systems. Interestingly, carbapenemase-encoding genes such as blaAIM-1, blaCAM-1, blaGIM-2, and blaHMB-1 were identified in distinct hosts. Our results revealed that, in general, the bacterial communities from humans were present in isolated clusters, except for the Northeastern region, where an overlap of the bacterial species from humans and food-producing animals was observed. Additionally, a large resistome was observed among all analyzed hosts, with emphasis on the presence of carbapenemase-encoding genes not previously reported in Latin America. IMPORTANCE Humans and food production animals have been reported to be important reservoirs of antimicrobial resistance (AMR) genes (ARGs). The frequency of these multidrug-resistant (MDR) bacteria tends to be higher in low- and middle-income countries (LMICs), due mainly to a lack of public health policies. Although studies on AMR in humans or animals have been carried out in Brazil, this is the first multicenter study that simultaneously collected rectal swabs from humans and food-producing animals for metagenomics. Our results indicate high microbial diversity among all analyzed hosts, and several ARGs for different antimicrobial classes were also found. As far as we know, we have detected for the first time ARGs encoding carbapenemases, such as blaAIM-1, blaCAM-1, blaGIM-2, and blaHMB-1, in Latin America. Thus, our results support the importance of metagenomics as a tool to track the colonization of food-producing animals and humans by antimicrobial-resistant bacteria. In addition, a network surveillance system called GUARANI, created for this study, is ready to be expanded and to collect additional data.
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Affiliation(s)
- Fabíola Marques de Carvalho
- Bioinformatics Laboratory, National Laboratory of Scientific Computing (LNCC), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tiago Barcelos Valiatti
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - Fernanda Fernandes Santos
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | | | - Ana Paula C. Guimarães
- Bioinformatics Laboratory, National Laboratory of Scientific Computing (LNCC), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Alexandra Lehmkuhl Gerber
- Bioinformatics Laboratory, National Laboratory of Scientific Computing (LNCC), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cintya de Oliveira Souza
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Vigilância em Saúde (SVS), Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Dandara Cassu Corsi
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - Danielle Murici Brasiliense
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Vigilância em Saúde (SVS), Ministério da Saúde, Ananindeua, Pará, Brazil
| | | | | | - Francisco Ozório Bessa-Neto
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, São Paulo, Brazil
| | - Glaucia Morgana de Melo Guedes
- Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | | | - Leandro Nascimento Lemos
- Bioinformatics Laboratory, National Laboratory of Scientific Computing (LNCC), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Lúcio Fábio Caldas Ferraz
- Laboratory of Molecular Biology of Microorganisms, University São Francisco (USF), Bragança Paulista, São Paulo, Brazil
| | - Márcia de Nazaré Miranda Bahia
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Vigilância em Saúde (SVS), Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Márcia Soares Mattos Vaz
- Universidade Federal da Grande Dourados (UFGD), Laboratório de Pesquisa em Ciências da Saúde, Dourados, Mato Grosso do Sul, Brazil
| | - Ramon Giovani Brandão da Silva
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, São Paulo, Brazil
| | - Ruanita Veiga
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - Simone Simionatto
- Universidade Federal da Grande Dourados (UFGD), Laboratório de Pesquisa em Ciências da Saúde, Dourados, Mato Grosso do Sul, Brazil
| | | | - William Alencar de Oliveira Lima
- Seção de Bacteriologia e Micologia, Instituto Evandro Chagas (IEC), Secretaria de Vigilância em Saúde (SVS), Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Carlos Roberto Veiga Kiffer
- Universidade Federal de São Paulo (UNIFESP), Laboratório Especial de Microbiologia Clínica (LEMC), Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - Antonio Carlos Campos Pignatari
- Universidade Federal de São Paulo (UNIFESP), Laboratório Especial de Microbiologia Clínica (LEMC), Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
| | - Rodrigo Cayô
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Bacteriologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, São Paulo, Brazil
| | | | - Ana Cristina Gales
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
- Universidade Federal de São Paulo (UNIFESP), Laboratório Especial de Microbiologia Clínica (LEMC), Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, São Paulo, Brazil
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Moses IB, Esimone CO, Iroha IR, Rubin JE, Sniatynsky MK, Ribeiro ÁCDS, Santos FF, Cayo da Silva R, Gales AC. Antibiotypes and high frequency of toxin genes in methicillin-resistant Staphylococcus pseudintermedius from nares of dogs and dog guardians in Nigeria. Comp Immunol Microbiol Infect Dis 2022; 89:101870. [PMID: 36088796 DOI: 10.1016/j.cimid.2022.101870] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 04/08/2022] [Revised: 08/31/2022] [Accepted: 09/02/2022] [Indexed: 10/14/2022]
Abstract
To determine the antibiotypes and frequency of toxin genes in methicillin-resistant Staphylococcus pseudintermedius (MRSP), 281 nasal swab samples were collected from dogs and dog guardians in Abakaliki, Southeastern Nigeria. Antimicrobial susceptibility testing was determined by disc diffusion technique while detection of toxin genes was carried out by PCR. Exactly 41 (28.7 %) and 6 (4.3 %) MRSP were obtained from dogs and dog guardians respectively. Isolates exhibited resistance (100-16.7 %) to amoxicillin-clavulanic acid, cephalosporins, fluoroquinolones, and carbapenems. Seccanine, lukD, siet, and exi toxin genes were harboured by 42 (89.4 %), 47 (100 %), 37 (78.7 %), and 2 (4.3 %) MRSP isolates respectively. This study has shown that dogs and dog guardians in Abakaliki, Southeastern Nigeria are colonized by multiple drug-resistant MRSP which harbour toxin genes. This represents a significant public health problem in veterinary and human medicine.
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Affiliation(s)
- Ikechukwu Benjamin Moses
- Department of Applied Microbiology, Faculty of Sciences, Ebonyi State University, P.M.B. 053, Abakaliki, Nigeria; Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil.
| | - Charles Okechukwu Esimone
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmaceutical Sciences, Nnamdi Azikiwe University, Awka, Nigeria
| | - Ifeanyichukwu Romanus Iroha
- Department of Applied Microbiology, Faculty of Sciences, Ebonyi State University, P.M.B. 053, Abakaliki, Nigeria
| | - J E Rubin
- Department of Veterinary Microbiology, Western College of Veterinary Medicine (WCVM), University of Saskatchewan, Canada
| | - M K Sniatynsky
- Department of Veterinary Microbiology, Western College of Veterinary Medicine (WCVM), University of Saskatchewan, Canada
| | - Ághata Cardoso da Silva Ribeiro
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| | - Fernanda Fernandes Santos
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| | - Rodrigo Cayo da Silva
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| | - Ana Cristina Gales
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
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Ribeiro ÁCS, Santos FF, Valiatti TB, Lenzi MH, Meneses JP, Sessa RGGD, Salles MJ, Gales AC. AVALIAÇÃO DA ATIVIDADE ANTIMICROBIANA DE DELAFLOXACINO CONTRA PATÓGENOS DE IMPORTÂNCIA CLÍNICA CAUSADORES DE INFECÇÕES DE PELES E PARTES MOLES COMPLICADAS E OSTEOMIELITE. Braz J Infect Dis 2022. [DOI: 10.1016/j.bjid.2022.102428] [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: 11/26/2022] Open
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Santos INM, Kurihara MNL, Santos FF, Valiatti TB, da Silva JTP, Pignatari ACC, Salles MJ. Comparative Phenotypic and Genomic Features of Staphylococci from Sonication Fluid of Orthopedic Implant-Associated Infections with Poor Outcome. Microorganisms 2022; 10:microorganisms10061149. [PMID: 35744667 PMCID: PMC9230661 DOI: 10.3390/microorganisms10061149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/25/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus spp. remain the leading biofilm-forming agents causing orthopedic implant-associated infections (OIAI). This is a descriptive study of phenotypic and genomic features identified in clinical isolates of S. aureus and coagulase-negative Staphylococcus (CoNS) recovered from OIAIs patients that progressed to treatment failure. Ten isolates were identified by matrix-time-of-flight laser-assisted desorption mass spectrometry (MALDI-TOF-MS) and tested for antibiotic susceptibility and biofilm formation. Genotypic characteristics, including, MLST (Multi Locus Sequence Typing), SCCmec typing, virulence and resistance genes were assessed by whole-genome sequencing (WGS). All S. aureus harbored mecA, blaZ, and multiple resistance genes for aminoglycosides and quinolones. All MRSA were strong biofilm producers harboring the complete icaADBC and icaR operon. Seven CoNS isolates comprising five species (S. epidermidis, S. haemolyticus, S. sciuri, S. capitis and S. lugdunensis) were analyzed, with mecA gene detected in five isolates. S. haemolitycus (isolate 95), and S. lugdunensis were unable to form biofilm and did not harbor the complete icaADBCR operon. High variability of adhesion genes was detected, with atl, ebp, icaADBC operon, and IS256 being the most common. In conclusion, MRSA and CoNS isolates carrying genes for biofilm production, and resistance to β-lactam and aminoglycosides are associated with treatment failure in OIAIs.
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Affiliation(s)
- Ingrid Nayara Marcelino Santos
- Laboratório Especial de Microbiologia (LEMC), Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04025-010, Brazil; (I.N.M.S.); (M.N.L.K.); (A.C.C.P.)
| | - Mariana Neri Lucas Kurihara
- Laboratório Especial de Microbiologia (LEMC), Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04025-010, Brazil; (I.N.M.S.); (M.N.L.K.); (A.C.C.P.)
| | - Fernanda Fernandes Santos
- Laboratório Alerta, Disciplina de Infectologia, Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil; (F.F.S.); (T.B.V.); (J.T.P.d.S.)
| | - Tiago Barcelos Valiatti
- Laboratório Alerta, Disciplina de Infectologia, Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil; (F.F.S.); (T.B.V.); (J.T.P.d.S.)
| | - Juliana Thalita Paulino da Silva
- Laboratório Alerta, Disciplina de Infectologia, Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil; (F.F.S.); (T.B.V.); (J.T.P.d.S.)
| | - Antônio Carlos Campos Pignatari
- Laboratório Especial de Microbiologia (LEMC), Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04025-010, Brazil; (I.N.M.S.); (M.N.L.K.); (A.C.C.P.)
| | - Mauro José Salles
- Laboratório Especial de Microbiologia (LEMC), Departamento de Medicina, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo 04025-010, Brazil; (I.N.M.S.); (M.N.L.K.); (A.C.C.P.)
- Faculdade de Ciências Médicas Santa Casa de São Paulo, São Paulo 01224-001, Brazil
- Hospital São Paulo, Universidade Federal de São Paulo (UNIFESP), São Paulo 04024-002, Brazil
- Correspondence: ; Tel.: +55-11-98536-0055
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Valiatti TB, Santos FF, Nunes PHS, Streling AP, Veiga R, Cayô R, Gales AC, Gomes TAT. Decreased susceptibility to imipenem and ceftazidime in early virulent Raoultella spp. strains retrieved from human intestinal infections. Braz J Microbiol 2022; 53:785-789. [PMID: 35138632 PMCID: PMC9151967 DOI: 10.1007/s42770-022-00699-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 02/01/2022] [Indexed: 02/01/2023] Open
Abstract
The genus Raoultella spp. is comprised of four species, namely, R. electrica, R. ornithinolytica, R. planticola, and R. terrigena, which are rarely reported to cause infections in humans. This study aimed to characterize six strains of Raoultella spp. isolated from stool samples from patients with diarrhea. The strains included in the study were previously identified by biochemical methods as K. pneumoniae, during a surveillance study conducted in 1987. In the present study, the strains were re-identified by MALDI TOF and 16S rRNA sequencing and subsequently subjected to virulence gene screening by PCR, hemolytic activity, biofilm formation, hypermucoviscosity phenotype, capacity to interact with Caco-2 cells, and antimicrobial susceptibility test. Our results revealed that, among the six strains, three were identified as R. ornithinolytica and three as R. planticola. The genes related to iron uptake systems (aero1, aero2, iutA, entB, and ybtS) and adhesin (mrkD) were found in all strains. Furthermore, all strains demonstrated the ability to interact in vitro with Caco-2 cells and form biofilms. In general, the strains studied were sensitive to the antimicrobials tested; however, it was possible to observe high MICs for imipenem compared to ertapenem and meropenem and high minimal inhibitory concentrations (MICs) for ceftazidime, except for one strain. Our results show the occurrence of virulent strains of Raoultella spp. with high MICs for imipenem and ceftazidime causing diarrhea. We hope that our findings can contribute to the understanding of the evolution of this species since, as far as we know, these are the oldest isolates reported so far.
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Affiliation(s)
- Tiago Barcelos Valiatti
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil. .,Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
| | - Fernanda Fernandes Santos
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil ,Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Pedro Henrique Soares Nunes
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Ana Paula Streling
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Ruanita Veiga
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Rodrigo Cayô
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil ,Laboratório de Imunologia e Microbiologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais Químicas e Farmacêuticas (ICAQF), Universidade Federal de São Paulo (UNIFESP), Diadema, SP Brazil
| | - Ana Cristina Gales
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Tânia Aparecida Tardelli Gomes
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
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Valiatti TB, Santos FF, Nunes PHS, Cayô R, Gales AC, Gomes TAT. Characterization of virulent Klebsiella variicola recovered from inpatients with intestinal and extraintestinal infections between 1987 and 1999. Diagn Microbiol Infect Dis 2021; 101:115482. [PMID: 34333212 DOI: 10.1016/j.diagmicrobio.2021.115482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 06/01/2021] [Accepted: 07/02/2021] [Indexed: 10/20/2022]
Affiliation(s)
- Tiago Barcelos Valiatti
- Universidade Federal de São Paulo (UNIFESP), Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), São Paulo, Brazil; Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, Brazil.
| | - Fernanda Fernandes Santos
- Universidade Federal de São Paulo (UNIFESP), Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), São Paulo, Brazil; Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, Brazil
| | - Pedro Henrique Soares Nunes
- Universidade Federal de São Paulo (UNIFESP), Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), São Paulo, Brazil
| | - Rodrigo Cayô
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, Brazil; Universidade Federal de São Paulo (UNIFESP), Laboratório de Imunologia e Microbiologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Diadema, São Paulo, Brazil
| | - Ana Cristina Gales
- Universidade Federal de São Paulo (UNIFESP), Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), São Paulo, Brazil
| | - Tânia Aparecida Tardelli Gomes
- Universidade Federal de São Paulo (UNIFESP), Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), São Paulo, Brazil
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Santos ACDM, Santos FF, Silva RM, Gomes TAT. Diversity of Hybrid- and Hetero-Pathogenic Escherichia coli and Their Potential Implication in More Severe Diseases. Front Cell Infect Microbiol 2020; 10:339. [PMID: 32766163 PMCID: PMC7381148 DOI: 10.3389/fcimb.2020.00339] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 06/04/2020] [Indexed: 12/17/2022] Open
Abstract
Although extraintestinal pathogenic Escherichia coli (ExPEC) are designated by their isolation site and grouped based on the type of host and the disease they cause, most diarrheagenic E. coli (DEC) are subdivided into several pathotypes based on the presence of specific virulence traits directly related to disease development. This scenario of a well-categorized E. coli collapsed after the German outbreak of 2011, caused by one strain bearing the virulence factors of two different DEC pathotypes (enteroaggregative E. coli and Shiga toxin-producing E. coli). Since the outbreak, many studies have shown that this phenomenon is more frequent than previously realized. Therefore, the terms hybrid- and hetero-pathogenic E. coli have been coined to describe new combinations of virulence factors among the classic E. coli pathotypes. In this review, we provide an overview of these classifications and highlight the E. coli genomic plasticity that results in some mixed E. coli pathotypes displaying novel pathogenic strategies, which lead to a new symptomatology related to E. coli diseases. In addition, as the capacity for genome interrogation has grown in the last few years, it is clear that genes encoding some virulence factors, such as Shiga toxin, are found among different E. coli pathotypes to which they have not traditionally been associated, perhaps foreshowing their emergence in new and severe outbreaks caused by such hybrid strains. Therefore, further studies regarding hetero-pathogenic and hybrid-pathogenic E. coli isolates are necessary to better understand and control the spread of these pathogens.
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Affiliation(s)
- Ana Carolina de Mello Santos
- Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Fernanda Fernandes Santos
- Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Rosa Maria Silva
- Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Tânia Aparecida Tardelli Gomes
- Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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Lima MP, Yamamoto D, Santos ACDM, Ooka T, Hernandes RT, Vieira MAM, Santos FF, Silva RM, Hayashi T, Gomes TAT. Phenotypic characterization and virulence-related properties of Escherichia albertii strains isolated from children with diarrhea in Brazil. Pathog Dis 2020; 77:5379300. [PMID: 30865776 DOI: 10.1093/femspd/ftz014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 10/30/2018] [Accepted: 03/12/2019] [Indexed: 11/14/2022] Open
Abstract
Escherichia albertii are emerging enteropathogens, whose identification is difficult, as they share biochemical characteristics and some virulence-related genes with diarrheagenic Escherichia coli (DEC). Studies on phylogeny, phenotypic characteristics and potential virulence factors of human E. albertii strains are scarce. In this study, we identified by multiplex PCR five E. albertii among 106 strains isolated from diarrheic children in São Paulo, Brazil, which were previously classified as atypical enteropathogenic E. coli. All strains were investigated regarding their phylogeny, biochemical properties, virulence-related properties, antimicrobial resistance and presence of putative virulence-related genes. All strains belonged to different E. albertii lineages and adhered to and produced attaching and effacing lesions on HeLa cells. Three strains invaded Caco-2 cells, but did not persist intracellularly, and three formed biofilms on polystyrene surfaces. All strains were resistant to few antibiotics and only one carried a self-transmissible resistance plasmid. Finally, among 38 DEC and 18 extraintestinal pathogenic E. coli (ExPEC) virulence-related genes searched, six and three were detected, respectively, with paa and cdtB being found in all strains. Despite the limited number of strains, this study provided additional knowledge on human E. albertii virulence potential, showing that they share important virulence factors with DEC and ExPEC.
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Affiliation(s)
- Mauricio P Lima
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil
| | - Denise Yamamoto
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil.,Rua Prof. Enéas de Siqueira Neto, Universidade Santo Amaro (UNISA), 340 CEP 04829-300-São Paulo, SP, Brazil
| | - Ana Carolina de Mello Santos
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil
| | - Tadasuke Ooka
- Department of Microbiology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Rodrigo T Hernandes
- Departamento de Microbiologia e Imunologia, Instituto de Biociências, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Distrito de Rubião Jr. CEP 18618-691, Botucatu, SP, Brazil
| | - Mônica A M Vieira
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil
| | - Fernanda Fernandes Santos
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil
| | - Rosa Maria Silva
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil
| | - Tetsuya Hayashi
- Department of Bacteriology, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maedashi, Higashi-ku, Fukuoka City, Fukuoka Prefecture 812-8582, Japan
| | - Tânia A T Gomes
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (UNIFESP-EPM), Universidade Federal de São Paulo, Rua Botucatu, 862, 3° andar, CEP 04023-062, São Paulo, SP, Brazil
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Santos FF, Li J, Brandão MDM, Machado LS, Soares NM, Nascimento ER, Khan MI, Pereira VLA. Characterization and Differentiation of Chicken Mycoplasma Isolates Using 16S-23S Intergenic Spacer Region Sequencing. Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2018-0834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- FF Santos
- Instituto Federal de Educacao Ciencia e Tecnologia do Amazonas, Brazil
| | - J Li
- University of Connecticut, USA
| | - MDM Brandão
- Instituto Federal de Educacao Ciencia e Tecnologia do Amazonas, Brazil
| | | | | | | | - MI Khan
- University of Connecticut, USA
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Sartoretto SM, Santos FF, Costa BP, Ceravolo GS, Santos-Eichler R, Carvalho MHC, Fortes ZB, Akamine EH. Involvement of inducible nitric oxide synthase and estrogen receptor ESR2 (ERβ) in the vascular dysfunction in female type 1 diabetic rats. Life Sci 2018; 216:279-286. [PMID: 30447304 DOI: 10.1016/j.lfs.2018.11.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 08/16/2018] [Revised: 10/31/2018] [Accepted: 11/13/2018] [Indexed: 11/25/2022]
Abstract
AIMS Inflammation is involved in diabetes-related vascular dysfunction. Estrogen receptor ESR2/ERβ induces the expression of inducible nitric oxide (NO) synthase (iNOS) and inflammation. The present study investigated the effect of alloxan-induced type 1 diabetes on the iNOS and ESR2 expression and the effect of the chronic iNOS inhibition on the vascular smooth muscle dysfunction in diabetic female rats. In addition, we evaluated the involvement of ESR2 in iNOS expression. MAIN METHODS Alloxan-induced diabetic female rats were treated or not with iNOS inhibitor (L-NIL). iNOS and ESR2 immunostaining, S-nitrosylated proteins and IL-1β protein expression in aorta and plasmatic NO levels were analyzed. Contractile response to noradrenaline was analyzed in endothelium-denuded aorta. iNOS mRNA expression was analyzed in isolated aortic smooth muscle cells (ASMCs) of female rats, incubated with 22 mM glucose and an ESR2 antagonist. KEY FINDINGS Aortic iNOS and ESR2 immunostaining, S-nitrosylated proteins, IL-1β protein expression and plasmatic NO levels were all increased, whereas noradrenaline-induced contraction was reduced in aorta of diabetic female rats. With the exception of iNOS and ESR2 immunostaining, all these parameters were corrected by L-NIL treatment. High glucose increased iNOS mRNA expression in ASMCs, which was reduced by an ESR2 antagonist. SIGNIFICANCE We demonstrated that increased iNOS-NO contributed to the impairment of the contractile response of aortic smooth muscle cells in female type 1 diabetic rats and that increased expression of iNOS may involve the participation of ESR2/ERβ.
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Affiliation(s)
- Simone Marcieli Sartoretto
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Fernanda Fernandes Santos
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Beatriz Pereira Costa
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Graziela Scalianti Ceravolo
- Department of Physiological Sciences, Biological Sciences Center, State University of Londrina, Paraná, Brazil
| | - Rosângela Santos-Eichler
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Zuleica Bruno Fortes
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Eliana Hiromi Akamine
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.
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Abreu DLC, Santos FF, José DS, Tortelly R, Nascimento ER, Pereira VLA. Pathological Aspects of a Subclinical Marek's Disease Case in Free-Range Chickens. Rev Bras Cienc Avic 2016. [DOI: 10.1590/18069061-2015-0001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- DLC Abreu
- Universidade Federal Fluminense, Brazil
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Giovanni DNS, Landulfo GA, Duarte LL, Santos FF, Ho PL, Mendonça RZ, Carvalho E, Junqueira-de-Azevedo ILM, Proença LAB, Barros-Battesti DM. Preliminary analysis of the transcriptome of salivary glands of Ornithodoros brasiliensis (Acari: Argasidae). BMC Proc 2014. [PMCID: PMC4211084 DOI: 10.1186/1753-6561-8-s4-p145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Brandão MDM, Santos FF, Machado LS, Verinaud MS, Oliveira JM, Soares NM, Nascimento ER, Pereira VLA. The effect of eggshell apex abnormalities on table egg quality during storage in 2 seasons of the year. Poult Sci 2014; 93:2657-62. [PMID: 25085932 DOI: 10.3382/ps.2014-03991] [Citation(s) in RCA: 8] [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] [Indexed: 11/20/2022] Open
Abstract
Mycoplasma synoviae infection of hens has been associated with problems of eggshell quality called eggshell apex abnormalities (EAA). Little is known about the quality of EAA eggs from a commercial point of view, especially during their storage. The study aimed to examine the differences between EAA and normal eggs during storage under controlled conditions in 2 seasons, summer and winter, by comparing internal and external quality parameters. In a conventional egg production farm with white laying hens of varying ages in the city of Bastos, state of São Paulo, Brazil, 232 eggs were used in the summer season and 400 eggs in the winter season. Half of the eggs had EAA, and the other half were considered normal eggs for each season. The eggs were analyzed at 2, 7, 14, 21, and 28 d after being laid and stored from 24.6 to 25.8°C in summer and from 24 to 25°C in winter. There was no difference (P > 0.05) in the average egg weight between EAA and normal eggs at any studied time point, but in both seasons, the weight loss in EAA eggs was higher than in normal eggs. The losses in Haugh unit scores from the first to the last measurements were approximately 40% regardless of egg type or season of production. In comparing eggshell thickness, only the apices of the EAA eggs were thinner (P < 0.0001) than normal eggs in the summer, but in the winter, the EAA egg apices (P < 0.0001) and sides (P = 0.03) were both thinner. The presence of EAA did not affect the eggshell weight (P > 0.05) or eggshell percentage (P > 0.05). The eggshell strength of the EAA eggs was lower (P < 0.0001) than normal eggs in both the summer (16.57%) and winter (19.86%). The presence of EAA did not affect the internal quality of the egg, but was related to a greater loss of external quality and weight during storage.
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Affiliation(s)
- M D M Brandão
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
| | - F F Santos
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
| | - L S Machado
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
| | - M S Verinaud
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
| | - J M Oliveira
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
| | - N M Soares
- Unidade de Pesquisa e Desenvolvimento de Bastos, Instituto Biológico, Bastos, 17690-000, Brazil
| | - E R Nascimento
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
| | - V L A Pereira
- Departamento de Saúde Coletiva Veterinária e Saúde Pública, Universidade Federal Fluminense, Niterói, 24230-340, Brazil
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Santos FF, de Turco EB, Gordon WC, Peyman GA, Bazan NG. Alterations in rabbit retina lipid metabolism induced by detachment. Decreased incorporation of [3H]DHA into phospholipids. Int Ophthalmol 1995; 19:149-59. [PMID: 8926126 DOI: 10.1007/bf00133731] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Docosahexaenoic acid (22:6n-3, DHA) is found in high concentration in phospholipids from retinal membranes, and is essential for their function. This study investigated the effect of in vivo retinal detachment on in vitro lipid metabolism using [3H]DHA. METHODS Rabbit retina was detached from the retinal pigment epithelium by injecting physiological saline into the subretinal space of the eye. Retinal samples from control (non-operated) and sham (operated, no detachment) animals, and from attached and detached retinal areas from the same eye, were incubated in vitro with [3H]DHA for 4 hours, and then prepared for biochemical and autoradiographic analysis. RESULTS In control and sham retinas, [3H]DHA was preferentially esterified into phospholipids (82%) with low labeling of free fatty acids (FFA) (5%). In samples from detached areas of the retina, a higher proportion of [3H]DHA was recovered in the FFA pool (up to 30%) and its esterification was shunted into triacylglycerol, thereby reducing the formation of [3H]DHA-phospholipids. Changes were sustained through 48 hours of postdetachment. High labeling of inner segments and synaptic terminals was observed autoradiographically in control retinas, while in detached retinas, clusters of labeling were detected in the neural retina, and eventually within the photoreceptor layer. CONCLUSION Retinal detachment induces longlasting changes in lipid metabolism which are reflected in lower labeling of [3H]DHA-phospholipids. Metabolic changes, sustained through 48 hours, may lead to inadequate synthesis/turnover of phospholipids, among them, those containing DHA, possibly resulting in defective disc membrane assembly with subsequent deterioration of visual cells.
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Affiliation(s)
- F F Santos
- LSU Eye Center, Louisiana State University Medical Center School of Medicine, New Orleans 70112-2234, USA
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