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Atypical enteropathogenetic Escherichia coli (atypical EPEC)


The term atypical EPEC is used to define the EPEC strains that does not have the EAF plasmid. This EPEC category has been found in association with diarrhea in several countries, including Brazil. At present they are the most common bacterial agent in child endemic diarrhea in Brazil. Atypical EPEC strains may belong to serotypes of the classical EPEC. The serogroups (classical serotypes) or to serotypes in other the serogroups (non classical serotypes). The classical atypical EPEC serotypes have been identified in several studies but the non-classical ones are less known. The classical serotypes are genetically related to E. coli O157:H7 and like this serotype have been isolated from bovines and other animal species. The most common virulence factors identified so far in atypical EPEC strains are the toxins EAST and Hly but recent studies suggest that there are many others factors. The objectives of this project may be divided in two groups: one group is aimed at determining the virulence mechanisms of these organisms and includes studies on their toxins, adhesins, genetic of these virulence factors, interaction mechanisms with the host cell, cell response and proteomics. The other group of objectives includes the characterization of the serotypes and clonal groups of atypical EPEC, genetic relationships of the human and animal strains an development of animal models. More details about these objectives may be found in the text of the project. (AU)

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Scientific publications (12)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
NARA, J. M.; CIANCIARULLO, A. M.; CULLER, H. F.; BUERIS, V.; HORTON, D. S. P. Q.; MENEZES, M. A.; FRANZOLIN, M. R.; ELIAS, W. P.; PIAZZA, R. M. F.. Differentiation of typical and atypical enteropathogenic Escherichia coli using colony immunoblot for detection of bundle-forming pilus expression. Journal of Applied Microbiology, v. 109, n. 1, p. 35-43, . (04/12136-5)
MENEZES, M. A.; ROCHA, L. B.; KOGA, P. C. M.; FERNANDES, I.; NARA, J. M.; MAGALHAES, C. A.; ABE, C. M.; AYALA, C. O.; BURGOS, Y. K.; ELIAS, W. P.; et al. Identification of enteropathogenic and enterohaemorrhagic Escherichia coli strains by immunoserological detection of intimin. Journal of Applied Microbiology, v. 108, n. 3, p. 878-887, . (04/12136-5)
BANDO, SILVIA Y.; ANDRADE, FERNANDA B.; GUTH, BEATRIZ E. C.; ELIAS, WALDIR P.; MOREIRA-FILHO, CARLOS A.; PESTANA DE CASTRO, ANTONIO F.. Atypical enteropathogenic Escherichia coli genomic background allows the acquisition of non-EPEC virulence factors. FEMS Microbiology Letters, v. 299, n. 1, p. 22-30, . (04/12136-5)
CULLER, HEBERT F.; MOTA, CRISTIANE M.; ABE, CECILIA M.; ELIAS, WALDIR P.; SIRCILI, MARCELO P.; FRANZOLIN, MARCIA R.. Atypical Enteropathogenic Escherichia coli Strains form Biofilm on Abiotic Surfaces Regardless of Their Adherence Pattern on Cultured Epithelial Cells. BIOMED RESEARCH INTERNATIONAL, . (04/12136-5)
MAGALHAES, CAROLINE A.; ROSSATO, SARITA S.; BARBOSA, ANGELA S.; DOS SANTOS, THIAGO O.; ELIAS, WALDIR P.; SIRCILI, MARCELO P.; PIAZZA, ROXANE M. F.. The ability of haemolysins expressed by atypical enteropathogenic Escherichia coli to bind to extracellular matrix components. Memórias do Instituto Oswaldo Cruz, v. 106, n. 2, p. 146-152, . (04/12136-5, 06/07145-0)
MENDES-LEDESMA, MEIRE R. B.; ROCHA, LETICIA B.; BUERIS, VANESSA; KRAUSE, GLADYS; BEUTIN, LOTHAR; FRANZOLIN, MARCIA R.; TRABULSI, LUIZ R.; ELIAS, WALDIR P.; PIAZZA, ROXANE M. F.. Production and characterization of rabbit polyclonal sera against Shiga toxins Stx1 and Stx2 for detection of Shiga toxin-producing Escherichia coli. MICROBIOLOGY AND IMMUNOLOGY, v. 52, n. 10, p. 484-491, . (04/12136-5)
MUNHOZ, DANIELLE D.; NARA, JULIA M.; FREITAS, NATALIA C.; MORAES, CLAUDIA T. P.; NUNES, KAMILA O.; YAMAMOTO, BRUNO B.; VASCONCELLOS, FRANCIELLI M.; MARTINEZ-LAGUNA, YGNACIO; GIRON, JORGE A.; MARTINS, FERNANDO H.; et al. Distribution of Major Pilin Subunit Genes Among Atypical Enteropathogenic Escherichia coli and Influence of Growth Media on Expression of the ecp Operon. FRONTIERS IN MICROBIOLOGY, v. 9, . (13/06589-6, 09/14845-7, 04/12136-5)
MORAES, CLAUDIA T. P.; POLATTO, JULIANA M.; ROSSATO, SARITA S.; IZQUIERDO, MARIANA; MUNHOZ, DANIELLE D.; MARTINS, FERNANDO H.; PIMENTA, DANIEL C.; FARFAN, MAURICIO J.; ELIAS, WALDIR P.; BARBOSA, ANGELA S.; et al. Flagellin and GroEL mediates in vitro binding of an atypical enteropathogenic Escherichia coli to cellular fibronectin. BMC Microbiology, v. 15, . (04/12136-5)
BUERIS, VANESSA; HUERTA-CANTILLO, JAZMN; NAVARRO-GARCIA, FERNANDO; RUIZ, RENATO M.; CIANCIARULLO, AURORA M.; ELIAS, WALDIR P.. Late Establishment of the Attaching and Effacing Lesion Caused by Atypical Enteropathogenic Escherichia coli Depends on Protein Expression Regulated by Per. Infection and Immunity, v. 83, n. 1, p. 379-388, . (04/12136-5)
MOURA, RODRIGO A.; SIRCILI, MARCELO P.; LEOMIL, LUCIANA; MATTE, MARIA HELENA; TRABULSI, LUIZ R.; ELIAS, WALDIR P.; IRINO, KINUE; PESTANA DE CASTRO, ANTONIO F.. Clonal Relationship among Atypical Enteropathogenic Escherichia coli Strains Isolated from Different Animal Species and Humans. Applied and Environmental Microbiology, v. 75, n. 23, p. 7399-7408, . (04/12136-5)
BARROS, SAMAR F.; ABE, CECILIA M.; ROCHA, SERGIO P. D.; RUIZ, RENATO M.; BEUTIN, LOTHAR; TRABULSI, LUIZ R.; ELIAS, WALDIR P.. Escherichia coli O125ac:H6 Encompasses Atypical Enteropathogenic E-coli Strains That Display the Aggregative Adherence Pattern. Journal of Clinical Microbiology, v. 46, n. 12, p. 4052-4055, . (04/12136-5)
ROCHA, L. B.; PIAZZA, R. M. F.. Production of Shiga toxin by Shiga toxin-expressing Escherichia coli (STEC) in broth media: from divergence to definition. Letters in Applied Microbiology, v. 45, n. 4, p. 411-417, . (04/12136-5)

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