Dr Luis Ricardo Castellanos


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Epidemiology, genomics and antimicrobial resistance of bacteria


My research interests include the evolution of bacteria and plasmids and the reduction of antimicrobial resistance (AMR). I have been involved in projects related to surveillance of AMR in bacteria from animals and food since 2009. I have been part of the initiative for a Colombian Integrated Program for AMR Surveillance (COIPARS).

My PhD project at the faculty of Veterinary Medicine of Utrecht University, provided an in-depth molecular characterisation of Salmonella enterica and Escherichia coli resistant to third generation cephalosporins in poultry. I joined Dr Alison Mather’s group at the Quadram Institute on a project to identify drivers and dynamics of S. enterica and AMR in pigs and chickens in Brazil.

Key publications

Phylogenomic Investigation of IncI1-Iγ Plasmids Harboring blaCMY-2 and blaSHV-12 in Salmonella enterica and Escherichia coli in Multiple Countries. Antimicrobial Agents and Chemotherapy, 2019. DOI: 10.1128/AAC.02546-18

Genomic Characterization of Extended-Spectrum Cephalosporin-Resistant Salmonella enterica in the Colombian Poultry Chain. Frontiers in Microbiology, 2018. DOI: 10.3389/fmicb.2018.02431

High Heterogeneity of Escherichia coli Sequence Types Harbouring ESBL/AmpC Genes on IncI1 Plasmids in the Colombian Poultry Chain. Plos One, 2017. DOI: 10.1371/journal.pone.0170777

The Establishment of the Colombian Integrated Program for Antimicrobial Resistance Surveillance (COIPARS): A Pilot Project on Poultry Farms, Slaughterhouses and Retail Market. Zoonoses and Public Health, 2015. DOI: 10.1111/zph.12192

Alikhan N, Moreno LZ, Castellanos R, Chattaway MA, McLauchlin J, Lodge M, O'Grady J, Zamudio R, Doughty E, Petrovska L, Cunha MPV, Knöb T, Moreno AM, Mather A. (2022)

Dynamics of Salmonella enterica and antimicrobial resistance in the Brazilian poultry industry and global impacts on public health

PLOS Genetics

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Castellanos LR,Van der Graaf-van Bloois L,Donado-Godoy P,Veldman K,Duarte F,Acuña MT,Jarquín C,Weill FX,Mevius DJ,Wagenaar JA,Hordijk J,Zomer AL. (2020)

Antimicrobial Resistance in Salmonella enterica Serovar Paratyphi B Variant Java in Poultry from Europe and Latin America.

Emerging infectious diseases

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