Infectious Diseases and the Immune System

Infectious diseases

Jerónimo Pachón Díaz
Jerónimo Pachón Díaz
Campus Hospital Universitario Virgen del Rocío
Avda. Manuel Siurot, s/n.
41013 · Sevilla
Laboratory: 208
María Elisa Cordero Matía
María Elisa Cordero Matía
Campus Hospital Universitario Virgen del Rocío
Avda. Manuel Siurot, s/n.
41013 · Sevilla
Laboratory: 208

Jerónimo Pachón Díaz

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  1. Group members
  2. Research areas
  3. Publications

Group: Infectious diseases

Group members Infectious diseases
  • Aguilar Guisado, Manuela.MD/Phd. Faculty Staff (HUVR).
  • Balsera Manzanero, María.Investigadora Predoctoral
  • Berastegui Cabrera, Judith.Lda. en Biología. Técnico.
  • Carretero Ledesma, Marta.Licenciada en Biología. Predoctoral
  • Cerrada Romero, Cristina.Investigadora en Formación
  • Cordero Matía, María Elisa.MD/PhD. Faculty Staff - Internal Medicine (HUVR).
  • Fontsere Recuenco, Sara.Lda. en Medicina. MIR.
  • Gálvez Benítez, Inmaculada.MIR HUVR
  • Herrera Espejo, Soraya.Lda. en Biología. Técnico.
  • López Verdugo, Macarena.Graduada en Enfermería
  • Pachón Díaz, Jerónimo.MD PhD./Professor of Medicine.
  • Rodríguez Hernández, Mª Jesús.Doctora en Medicina y Cirugía. FEA.
  • Rodríguez Villodrés, Ángel.Investigador Río Hortega
  • Salto Alejandre, Sonsoles.MIR HUVR
  • Sánchez Céspedes, Javier.PhD in Biology. Post-doctoral fellow (Sara Borrell).
  • Smani, Younes.PhD in Biology. Post-doctoral fellow.
  • Vila Domínguez, Andrea.Investigadora Predoctoral PFIS

Research areas

The scientific work carried out by our group focuses on several lines:


Therapeutic alternatives in infections by multiresistant bacteria.

Through this line, projects for the evaluation of new antimicrobial treatments caused by bacteria with different mechanisms of resistance, such as Acinetobacter baumannii, Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae, are carried out with different experimental models of infections, such as such as pneumonia, meningitis, peritoneal sepsis, foreign body and endocarditis, in which in vitro studies, pharmacokinetic / pharmacodynamic studies and efficacy in vivo studies are carried out, to evaluated different parameters.

Within this line, antimicrobials commonly used in human clinical are studied, to evaluate their activity on bacteria with prevalent resistance mechanisms, or their use in combination to other antimicrobial. Moreover, new molecules with antimicrobial activity are evaluated in a preclinical development phase. Different projects in this line are carried out as coordinated studies with other Spanish research groups, mostly from the Spanish Research Network in Infectious Pathology (REIPI, Instituto de Salud Carlos III).


Infections in immunosuppressed patients.

Infection studies are carried out in: i) recipients of solid organ transplants; ii) hematopoietic progenitors and iii) in cancer patients, using clinical epidemiology methods, on the incidence and risk factors, etiology, and clinical characteristics and prognosis in these groups of patients, as well as febrile neutropenia syndrome after chemotherapy.

The infections under study are bacteremia, pneumonia, infection of the surgical wound and urinary infection. Also infections by specific microorganisms such as cytomegalovirus, Aspergillus spp. and ESBL-producing Klebsiella pneumoniae. In this line, studies are carried out on specific aspects of fungal infections such as the empirical antifungal treatment in selected patients with neutropenia and persistent fever.

Infections in transplants and onco-hematological patients.

Viral infections such as viral respiratory infections are a cause of morbidity and mortality in immunosuppressed patients. In this line, studies are being carried out on the relationship between the specific immunity against viruses and the evolution of infection / disease caused by these viruses. In the studies of the disease caused by viruses after transplantation, we optimize molecular techniques for the detection of herpes virus, parainfluenza virus, adenovirus and respiratory syncytial virus, as well as other emerging or recently diagnosed viruses, of which it is not yet well known its epidemiology and prognosis.

Endovascular infections

Through this line, projects are carried out on epidemiological factors (nosocomial endocarditis, incidence in the elderly, evolution over time, etc.) in infectious endocarditis, relevant clinical aspects (development of ventricular failure, neurological disorders, etc.). ), microbiological aspects (Staphylococcus, Enterococcus faecalis, Coxiella burnetii) and the therapeutic management in its medical and surgical aspects.

We also investigate infections in cardiac electrical stimulation devices. Different projects in this line are carried out as studies with other Spanish research groups, mostly from the Spanish Research Network in Infectious Pathology (REIPI, Instituto de Salud Carlos III).


International Journals
Parra-Millán R, Vila-Farrés X, Ayerbe-Algaba R, Varese M, Sánchez-Encinales V, Bayó N, Pachón-Ibáñez ME, Teixidó M, Vila J, Pachón J, Giralt E, Smani Y.
Synergistic activity of an OmpA inhibitor and colistin against colistin-resistant Acinetobacter baumannii: mechanistic analysis and in vivo efficacy.
J Antimicrob Chemother
Gil-Marqués ML, Moreno-Martínez P, Costas C, Pachón J, Blázquez J, McConnell MJ.
Peptidoglycan recycling contributes to intrinsic resistance to fosfomycin in Acinetobacter baumannii.
J Antimicrob Chemother
3. Gil-Marqués ML, Pachón-Ibáñez ME, Pachón J, Smani Y.
Effect of hypoxia on the pathogenesis of Acinetobacter baumannii and Pseudomonas aeruginosa in vitro and in murine experimental models of infections.
Infect Immun.
Ghashghaei O, Caputo S, Sintes M, Revés M, Kielland N, Estarellas C, Luque FJ, Aviñó A, Eritja R, Serna-Gallego A, Marrugal-Lorenzo JA, Pachón J, Sánchez-Céspedes J, Treadwell R, de Moliner F, Vendrell M, Lavilla R.
Multiple Multicomponent Reactions: Unexplored Substrates, Selective Processes, and Versatile Chemotypes in Biomedicine.
Pulido MR, García-Quintanilla M, Pachón J, McConnell MJ.
Immunization with lipopolysaccharide-free outer membrane complexes protects against Acinetobacter baumannii infection.
Pachón-Ibáñez ME, Labrador-Herrera G, Cebrero-Cangueiro T, Díaz C, Smani Y, Del Palacio JP, Rodríguez-Baño J, Pascual A, Pachón J, Conejo MC.
Efficacy of Colistin and Its Combination With Rifampin in Vitro and in Experimental Models of Infection Caused by Carbapenemase-Producing Clinical Isolates of Klebsiella pneumoniae.
Front Microbiol
Carretero-Ledesma M, García-Quintanilla M, Martín-Peña R, Pulido MR, Pachón J, McConnell MJ.
Phenotypic changes associated with Colistin resistance due to Lipopolysaccharide loss in Acinetobacter baumannii.
Parra-Millán R, Guerrero-Gómez D, Ayerbe-Algaba R, Pachón-Ibáñez ME, Miranda-Vizuete A, Pachón J, Smani Y.
Intracellular Trafficking and Persistence of Acinetobacter baumannii Requires Transcription Factor EB.
Vila-Farrés X, Parra-Millán R, Sánchez-Encinales V, Varese M, Ayerbe-Algaba R, Bayó N, Guardiola S, Pachón-Ibáñez ME, Kotev M, García J, Teixidó M, Vila J, Pachón J, Giralt E, Smani Y.
Combating virulence of Gram-negative bacilli by OmpA inhibition.
Sci Rep
Martínez-Florensa M, Consuegra-Fernández M, Aranda F, Armiger-Borràs N, Di Scala M, Carrasco E, Pachón J, Vila J, González-Aseguinolaza G, Lozano F. Erratum for Martínez-Florensa et al.
Protective Effects of Human and Mouse Soluble Scavenger-Like CD6 Lymphocyte Receptor in a Lethal Model of Polymicrobial Sepsis
Antimicrob Agents Chemother
Rodríguez-Villodres Á, Ortiz de la Rosa JM, Álvarez-Marín R, Pachón J, Aznar J, Lepe JA, Smani Y.
Heteroresistance to Piperacillin-Tazobactam in Clinical Isolates of Escherichia coli Sequence Type 131.
Antimicrob Agents Chemother
Pachón-Ibáñez ME, Smani Y, Pachón J, Sánchez-Céspedes J.
Perspectives for clinical use of engineered human host defense antimicrobial peptides.
FEMS Microbiol Rev
Sánchez-Encinales V, Álvarez-Marín R, Pachón-Ibáñez ME, Fernández-Cuenca F, Pascual A, Garnacho-Montero J, Martínez-Martínez L, Vila J, Tomás MM, Cisneros JM, Bou G, Rodríguez-Baño J, Pachón J, Smani Y.
Overproduction of Outer Membrane Protein A by Acinetobacter baumannii as a Risk Factor for Nosocomial Pneumonia, Bacteremia, and Mortality Rate Increase.
J Infect Dis.
Harding CM, Pulido MR, Di Venanzio G, Kinsella RL, Webb AI, Scott NE, Pachón J, Feldman MF.
Pathogenic Acinetobacter species have a functional type I secretion system and contact-dependent inhibition systems.
J Biol Chem
Domínguez-Herrera J, López-Rojas R, Smani Y, Labrador-Herrera G, Pachón J.
Efficacy of ceftaroline versus vancomycin in an experimental foreign-body and systemic infection model caused by biofilm-producing methicillin-resistant Staphylococcus epidermidis.
Int J Antimicrob Agents.
Álvarez-Marín R, López-Rojas R, Márquez JA, Gómez MJ, Molina J, Cisneros JM, Ortiz-Leyba C, Aznar J, Garnacho-Montero J, Pachón J.
Colistin Dosage without Loading Dose Is Efficacious when Treating Carbapenem-Resistant Acinetobacter baumannii Ventilator-Associated Pneumonia Caused by Strains with High Susceptibility to Colistin
PLoS One.
Martínez-Florensa M, Consuegra-Fernández M, Aranda F, Armiger-Borràs N, Di Scala M, Carrasco E, Pachón J, Vila J, González-Aseguinolaza G, Lozano F.
Protective Effects of Human and Mouse Soluble Scavenger-Like CD6 Lymphocyte Receptor in a Lethal Model of Polymicrobial Sepsis.
Antimicrob Agents Chemother.
López M, Rueda A, Florido JP, Blasco L, Gato E, Fernández-García L, Martínez-Martínez L, Fernández-Cuenca F, Pachón J, Cisneros JM, Garnacho-Montero J, Vila J, Rodríguez-Baño J, Pascual A, Bou G, Tomás M.
Genomic Evolution of Two Acinetobacter baumannii Clinical Strains from ST-2 Clones Isolated in 2000 and 2010 (ST-2_clon_2000 and ST-2_clon_2010)
Genome Announc.
García-Quintanilla M, Caro-Vega JM, Pulido MR, Moreno-Martínez P, Pachón J, McConnell MJ.
Inhibition of LpxC Increases Antibiotic Susceptibility in Acinetobacter baumannii.
Antimicrob Agents Chemother.
Sánchez-Céspedes J, Martínez-Aguado P, Vega-Holm M, Serna-Gallego A, Candela JI, Marrugal-Lorenzo JA, Pachón J, Iglesias-Guerra F, Vega-Pérez JM.
New 4-Acyl-1-phenylaminocarbonyl-2-phenylpiperazine Derivatives as Potential Inhibitors of Adenovirus Infection. Synthesis, Biological Evaluation, and Structure-activity Relationships.
J Med Chem.
López-Rojas R, García-Quintanilla M, Labrador-Herrera G, Pachón J, McConnell MJ.
Impaired growth under iron-limiting conditions associated with the acquisition of colistin resistance in Acinetobacter baumannii.
Int J Antimicrob Agents.
Parra Millán R, Jiménez Mejías ME, Sánchez Encinales V, Ayerbe Algaba R, Gutiérrez Valencia A, Pachón Ibáñez ME, Díaz C, Pérez Del Palacio J, López Cortés LF, Pachón J, Smani Y.
Efficacy of Lysophosphatidylcholine in Combination with Antimicrobial Agents against Acinetobacter baumannii in Experimental Murine Peritoneal Sepsis and Pneumonia Models.
Antimicrob Agents Chemother.
Smani Y, Pachón-Ibáñez ME, Pachón J.
New molecules and adjuvants in the treatment of infections by Acinetobacter baumannii.
Expert Opin Pharmacother.
Labrador-Herrera G, Álvarez R, López-Rojas R, Smani Y, Cebrero-Cangueiro T, Rueda A, Pérez Florido J, Pachón J, Pachón-Ibáñez ME.
Draft Genome Sequences of Seven Multidrug-Resistant Acinetobacter baumannii Strains, Isolated from Respiratory Samples in Spain.
Genome Announc.
Álvarez R, López Cortés LE, Molina J, Cisneros JM, Pachón J.
Optimizing the Clinical Use of Vancomycin.
Antimicrob Agents Chemother.
Pachón-Ibáñez ME, Smani Y, Pachón J.
Use of adjuvants in the treatment of Acinetobacter baumannii.
Expert Rev Anti Infect Ther.