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266 Evaluation of IR Biotyper for long-term surveillance of carbapenemase-producing Klebsiella pneumoniae clinical isolates

Ana Constança Mendes Serviço de Microbiologia, Centro Hospitalar Universitário do Porto, Portugal anaconstancamendes@chporto.min-saude.pt Tânia Silva1, Júlio Teixeira1, Maria Helena Ramos1, Ângela Novais2, Luísa Peixe2 Serviço de Microbiologia, Centro Hospitalar Universitário do Porto, Porto, Portugal1; UCIBIO/REQUIMTE and Associate Laboratory i4HB - Institute for Health and Bioeconomy. Laboratory of Microbiology, Faculty of Pharmacy, Porto University, Porto, Portugal2;

263 Evaluation of minimum inhibitory concentrations of plants extracts against several bacterial pathogens

Marta Isabel Pimenta de Carvalho Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal marta_carvalho1992@hotmail.com Adma Melo1, Tiago Afonso1, Joana Barbosa1,Tânia Ribeiro1, Freni Tavaria1, Márcio Carocho2, Lilian Barros2, Manuela Pintado1 and Paula Teixeira1 1Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal, 2Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal

259 Detoxification of toxic intermediates produced by oxygen reduction in human pathogens

Raquel Pereira Portela 1- Microbial Stress Lab, UCIBIO, NOVA School of Science and Technology, NOVA University Lisbon, Portugal, 2- Associate Laboratory i4HB -Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, Portugal. rp.portela@fct.unl.pt Ricardo Oliveira1,2, Alicia Tostão1,2, Bárbara Vitorino Gonçalves2,3, Rita Gonçalves Sobral2,3, Sofia Rocha Pauleta1,2 1- Microbial Stress Lab, UCIBIO, NOVA School of Science and Technology, NOVA University Lisbon, Portugal, 2- Associate Laboratory i4HB -Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, Portugal, 3-Molecular Microbiology of Bacterial Pathogens Lab, UCIBIO, NOVA School of Science and Technology, NOVA University Lisbon, Portugal.

250 Co-carriage of clinically important antimicrobial resistance genes by healthy companion animals and their human household members

Juliana Menezes University of Lisbon, CIISA - Centre of Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, Lisbon, Portugal julianamenezes@fmv.ulisboa.pt Joana Moreira da Silva, Andreia Amaral, Constança Pomba University of Lisbon, CIISA - Centre of Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, Lisbon, Portugal

249 Virulence traits of Staphylococcus aureus associated with skin and soft tissue infections in humans and animals

Ketlyn Oliveira Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, UNL, Portugal; kaat_oliveira@hotmail.com Patrícia Abrantes1, Carolina Ferreira1, Rute Ribeiro1, Maria Serrano1, Constança Pomba2,3, Isabel Couto1, and Sofia Santos Costa1 1 Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, UNL, Lisbon, Portugal, 2 CIISA, Centre of Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal, 3 GeneVet, Laboratório de Diagnóstico Molecular Veterinário, Carnaxide, Portugal

245 Conjugation of imidazolium-based ionic liquids to antimicrobial peptides: effects on antimicrobial activity and cytotoxicity

Ana Rita Teixeira Ferreira LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto up200607078@edu.fc.up.pt Lucinda Janete Bessa2, Ana Gomes1, Luísa Aguiar1, Cátia Teixeira1, Paula Gameiro1, Paula Gomes1 LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto1, Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz - Cooperativa de Ensino Superior, CRL2

244 Screening of stress effect on the survival of clinical and environmental antibiotic resistant Escherichia coli and Klebsiella pneumoniae isolates

Joana Abreu-Silva Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal jpsilva@ucp.pt Sara Ribeirinho-Soares2*, Catarina Ferreira1, Jaqueline Rocha1, Olga C. Nunes2 and Célia M. Manaia1 1Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; 2LEPABE – Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal *These authors contributed equally

243 Assessing the role of phenotypic heterogeneity on Staphylococcus aureus tolerance to beta-lactams

Pedro Baptista Fernandes Laboratory of Bacterial Cell Biology, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa pedro.fernandes@itqb.unl.pt Vincent De Bakker and Mariana Gomes de Pinho Laboratory of Bacterial Cell Biology, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa

242 The pig production chain in Portugal is a key reservoir of antibiotic-resistant and pathogenic Enterobacteriaceae

Maria Miragaia 1Laboratory of Bacterial Evolution and Molecular Epidemiology, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal miragaia@itqb.unl.pt Mariana Araújo1, Nuno A. Faria1, Mariana Camoez1, Ons Bouchami1, Helena Fernandes2, Maria João Franqueza2, Maria Miragaia1 1Laboratory of Bacterial Evolution and Molecular Epidemiology Instituto de Tecnologia Química e Biológica António Xavier Universidade Nova de Lisboa, 2CIISA Portugal Faculdade de Medicina Veterinária Universidade de Lisboa

237 Are quaternary ammonium surfactants a good prophylactic option against Streptococcus agalactiae vertical transmission?

Rita Calado National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal ritadiogoalmeida@gmail.com Rita Calado, João C. Rodrigues, Otília Vieira, Winchill Vaz, João P. Gomes, Alexandra Nunes NOVA Medical School, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal, CBIOS-Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal, Faculty of Veterinary Medicine, Lusófona University, Lisboa, Portugal