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Autor Ruiz, Joaquim |
Documentos disponibles escritos por este autor (26)
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Gomes, Cláudia ; Ruiz-Roldan, Lidia ; Mateu, Judit ; Ochoa, Theresa J. ; Ruiz, Joaquim | Nature Research | 2019-07-04T16:59:21ZDespite azithromycin being used in some countries to treat infections caused by Gram-negative pathogens, no resistance breakpoint for Escherichia coli exists. The aim of this study was to analyse the levels and mechanisms of azithromycin resista[...]![]()
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Gomes, Cláudia ; Pons, Maria J. ; Del Valle Mendoza, Juana Mercedes ; Ruiz, Joaquim | BioMed Central Ltd. | 2017-11-08T22:20:47ZCarrion’s disease is a neglected tropical disease caused by Bartonella bacilliformis, a vector-borne pathogen restricted to the Andean valleys of Peru, Ecuador and Colombia. Carrion’s disease is a biphasic illness; in the acute phase the case-fa[...]![]()
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Horna, Gertrudis ; Velasquez, Jorge ; Fernandez, Nathaly ; Tamariz, Jesus ; Ruiz, Joaquim | Elsevier | 2019-01-25T16:59:36ZOBJECTIVES: The aim of this study was to characterise a KPC-carrying Klebsiella pneumoniae isolate from a Peruvian hospital setting. METHODS: The identity of the isolate was confirmed by amplification and sequencing of the 16S rRNA gene, and the[...]![]()
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Medina, Anicia M. ; Rivera, Fulton P. ; Pons, Maria J. ; Riveros, Maribel ; Gomes, Cláudia ; Bernal, Maria ; Meza, Rina ; Maves, Ryan C. ; Huicho, Luis ; Chea-Woo, Elsa ; Lanata, Claudio F. ; Gil, Ana I. ; Ochoa, Theresa J. ; Ruiz, Joaquim | Oxford University Press | 2019-02-06T14:57:42ZBACKGROUND: Antibiotic resistance is increasing worldwide, being of special concern in low- and middle-income countries. The aim of this study was to determine the antimicrobial susceptibility and mechanisms of resistance in 205 enterotoxigenic [...]![]()
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Martinez-Puchol, Sandra ; Gomes, Cláudia ; Pons, Maria J. ; Ruiz-Roldan, Lidia ; Torrents de la Pena, Alba ; Ochoa, Theresa J. ; Ruiz, Joaquim | Wiley | 2019-02-06T14:52:12ZFurazolidone-resistant mutants were obtained from four clinical isolates of diarrhoeagenic Escherichia coli. The stability of the resistance and the frequency of mutation were established. The minimal inhibitory concentration of furazolidone, ni[...]![]()
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Mosquito, Susan ; Pons, Maria J. ; Riveros, Maribel ; Ruiz, Joaquim ; Ochoa, Theresa J. | Hindawi Publishing Corporation | 2019-02-06T14:57:41ZConventionally, in Escherichia coli, phylogenetic groups A and B1 are associated with commensal strains while B2 and D are associated with extraintestinal strains. The aim of this study was to evaluate diarrheagenic (DEC) and commensal E. coli[...]![]()
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Pantenburg, Birte ; Ochoa, Theresa J. ; Ecker, Lucie ; Ruiz, Joaquim | American Society of Tropical Medicine and Hygiene | 2020-06-10T18:11:36ZChildhood diarrhea is an important cause of malnutrition, which can be worsened when caretakers limit nutritional support. We queried 390 caregivers and their children in a peri-urban community in Lima, Peru regarding general perceptions of feed[...]![]()
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Horna, Gertrudis ; Amaro, Catherine ; Palacios, Aida ; Guerra, Humberto ; Ruiz, Joaquim | Nature Research | 2019-08-08T15:23:48ZThe type III secretion system of Pseudomonas aeruginosa is an important virulence factor contributing to the cytotoxicity and the invasion process of this microorganism. The current study aimed to determine the presence of the exoU+/exoS+ genoty[...]![]()
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Pons, Maria J. ; Gomes, Cláudia ; Aguilar, Ruth ; Barrios, Diana ; Aguilar-Luis, Miguel Angel ; Ruiz, Joaquim ; Dobaño, Carlota ; Del Valle-Mendoza, Juana ; Moncunill, Gemma | Public Library of Science | 2017-10-09T17:11:19ZAnalysis of immune responses in Bartonella bacilliformis carriers are needed to understand acquisition of immunity to Carrion’s disease and may allow identifying biomarkers associated with bacterial infection and disease phases. Serum samples fr[...]![]()
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Durand, David ; Alvarez, Daniela ; Diaz, David ; Mercado, Erik ; Ruiz, Joaquim ; Ochoa, Theresa J. | Elsevier Doyma | 2020-07-14T00:01:08ZINTRODUCTION: We evaluated the presence of sIgA in saliva, versus Escherichia coli secreted proteins (Esp) related to the type III secretion system (T3SS), and its semi-quantitative concentration in children under 2 years-old (no longer breastfe[...]![]()
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Horna, Gertrudis ; López, María ; Guerra, Humberto ; Saenz, Yolanda ; Ruiz, Joaquim | Nature Research | 2018-11-30T17:17:14ZMexAB-OprM and MexEF-OprN are Pseudomonas aeruginosa efflux pumps involved in the development of antibiotic resistance. Several studies developed with laboratory strains or using a few clinical isolates have reported that the regulation system o[...]![]()
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Gomes, Cláudia ; Martinez-Puchol, Sandra ; Palma, Noemi ; Horna, Gertrudis ; Ruiz-Roldan, Lidia ; Pons, Maria J. ; Ruiz, Joaquim | Taylor & Francis | 2019-01-25T17:00:26ZFrom its introduction in 1952 onwards, the clinical use of macrolides has been steadily increasing, both in human and veterinary medicine. Although initially designed to the treatment of Gram-positive microorganisms, this antimicrobial family ha[...]![]()
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Riveros, Maribel ; Garcia, Wilfredo ; García, Coralith ; Durand, David ; Mercado, Erik ; Ruiz, Joaquim ; Ochoa, Theresa J. | American Society of Tropical Medicine and Hygiene | 2019-01-25T15:28:06ZEscherichia coli is an important cause of Gram-negative bacteremia. The aim of this study was to characterize at the molecular and phenotypic levels E. coli strains belonging to different diarrheagenic pathotypes [diarrheagenic E. coli (DEC)] is[...]![]()
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Ulloa, Gabriela M. ; Vásquez-Achaya, Fernando ; Gomes, Cláudia ; Del Valle, Luis J. ; Ruiz, Joaquim ; Pons, Maria J. ; Del Valle Mendoza, Juana | American Society of Tropical Medicine and Hygiene | 2018-11-30T17:17:16ZCarrion's disease is a neglected, vector-borne illness that affects Colombia, Ecuador, and especially Peru. The phlebotomine sand flies Lutzomyia verrucarum and Lutzomyia peruensis are the main illness vectors described, although other species m[...]![]()
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Mercado, Erik-H. ; Piscoche, Cristian ; Contreras, Carmen ; Durand, David ; Riveros, Maribel ; Ruiz, Joaquim ; Ochoa, Theresa-J. | Elsevier | 2019-02-06T14:45:55ZEPEC is an attaching and effacing diarrheal pathogen that carries a large pathogenicity island, locus for enterocyte effacement (LEE). Recently, the pathogenicity island PAI O-122 was described among non-LEE effectors and found to be associated [...]![]()
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Durand, David ; Contreras, Carmen A. ; Mosquito, Susan ; Ruiz, Joaquim ; Cleary, Thomas G. ; Ochoa, Theresa J. | Taylor & Francis | 2019-02-22T14:54:28ZEnteroaggregative Escherichia coli (EAEC) causes acute and persistent diarrhea among children, HIV-infected patients, and travelers to developing countries. We have searched for 18 genes-encoding virulence factors associated with aggregative adh[...]![]()
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Ruiz Roldán, Lidia ; Martínez Puchol, Sandra ; Gomes, Cláudia ; Palma, Noemi ; Riveros, Maribel ; Ocampo, Karen ; Durand, David ; Ochoa, Theresa J. ; Ruiz, Joaquim ; Pons, Maria J. | Instituto Nacional de Salud | 2019-03-05T15:24:21ZObjetivos. El objetivo del presente estudio fue describir la presencia de Enterobacteriaceae en muestras de carne recolectadas en mercados tradicionales de Lima y establecer los niveles de resistencia a antimicrobianos y la presencia de betalact[...]![]()
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Henriquez-Camacho, Cesar ; Ventosilla, Palmira ; Minnick, Michael F. ; Ruiz, Joaquim ; Maguina, Ciro | Hindawi Publishing Corporation | 2019-02-06T14:59:06ZBartonella bacilliformis is the etiologic agent of Carrion's disease or Oroya fever. B. bacilliformis infection represents an interesting model of human host specificity. The notable differences in clinical presentations of Carrion's disease sug[...]![]()
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Palma, Noemi ; Pons, Maria J. ; Gomes, Cláudia ; Mateu, Judit ; Riveros, Maribel ; Garcia, Wilfredo ; Jacobs, Jan ; García, Coralith ; Ochoa, Theresa J. ; Ruiz, Joaquim | Elsevier | 2019-01-25T17:00:30ZOBJECTIVES: To characterise the ?-lactam, quinolone and macrolide resistance levels and mechanisms in 62 Escherichia coli isolates causing bacteraemia in Peruvian children. METHODS: Minimum inhibitory concentrations (MICs) of ciprofloxacin, nali[...]![]()
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Palma, Noemi ; Pons, Maria J. ; Gomes, Cláudia ; Mateu, Judit ; Riveros, Maribel ; Garcia, Wilfredo ; Jacobs, Jan ; García, Coralith ; Ochoa, Theresa J. ; Ruiz, Joaquim | Elsevier Ltd | 2017-10-20T20:07:53ZEl texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. Objectives To characterise the ?-lactam, quinolone and macrolide resistance levels and mechanism[...]![]()
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Martinez-Puchol, Sandra ; Pons, Maria J. ; Ruiz-Roldan, Lidia ; Laureano-Adame, Laura ; Corujo, Alfredo ; Ochoa, Theresa J. ; Ruiz, Joaquim | Instituto Nacional de Salud | 2020-07-14T00:02:33ZThe mechanisms of resistance to nitrofurans from 18 meat samples with Salmonella enterica (chicken: 15; beef: 2; pork: 1) collected in Lima (Peru) were analyzed. The isolates were serotyped and the susceptibility levels to furazolidone and nitro[...]![]()
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Durand, David ; Alvarez, Daniela ; Diaz, David ; Mercado, Erik ; Ruiz, Joaquim ; Ochoa, Theresa J. | Elsevier Doyma | 2019-12-06T21:04:45ZINTRODUCTION: We evaluated the presence of sIgA in saliva, versus Escherichia coli secreted proteins (Esp) related to the type III secretion system (T3SS), and its semi-quantitative concentration in children under 2 years-old (no longer breastfe[...]![]()
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Horna, Gertrudis ; Quezada, Karina ; Ramos, Susan ; Mosqueda, Noraida ; Rubio, Mercedes ; Guerra, Humberto ; Ruiz, Joaquim | Hemeroteca Científica Catalana | 2019-07-04T17:01:20ZThe relationships between specific type IV pili (TFP) groups and antibiotic resistance, biofilm formation, and bacterial motility were determined in 190 Pseudomonas aeruginosa clinical isolates. While motility and biofilm formation were determin[...]![]()
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Lluque, Angela ; Riveros, Maribel ; Prada, Ana ; Ochoa, Theresa J. ; Ruiz, Joaquim | Hindawi Publishing Corporation | 2019-01-25T16:20:56ZThe presence of virulence factors (VFs) and mechanisms of quinolones and macrolide resistance was analyzed in Campylobacter spp. from a pediatric cohort study in Lima. In 149 isolates (39 Campylobacter jejuni and 24 Campylobacter coli from diarr[...]![]()
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Lluque, Angela ; Mosquito, Susan ; Gomes, Cláudia ; Riveros, Maribel ; Durand, David ; Tilley, Drake H. ; Bernal, Maria ; Prada, Ana ; Ochoa, Theresa J. ; Ruiz, Joaquim | Elsevier | 2019-02-06T14:52:37ZThe study was aimed to describe the serotype, mechanisms of antimicrobial resistance, and virulence determinants in Shigella spp. isolated from Peruvian children. Eighty three Shigella spp. were serogrouped and serotyped being established the an[...]![]()
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Palma, Noemi ; Gomes, Cláudia ; Riveros, Maribel ; Garcia, Wilfredo ; Martinez-Puchol, Sandra ; Ruiz-Roldan, Lidia ; Mateu, Judit ; García, Coralith ; Jacobs, Jan ; Ochoa, Theresa-J. ; Ruiz, Joaquim | Elsevier | 2019-02-06T14:45:57ZThe presence of 25 virulence genes (VGs), genetic phylogroups, quinolone-resistance and Extended Spectrum beta-lactamase (ESBL)-production was assessed in 65 Escherichia coli isolates from blood cultures in children