# Characterization of antimicrobial resistance and genome of a Salmonella enterica serovar Rissen (FARPER-637) isolated from swine in Peru

**Authors:** Angela Montalván-Avalos, Luis Tataje-Lavanda, Doris Villanueva-Pérez, Dora Rios-Matos, Diego Paredes-Inofuente, Suly Montoya-Ortiz, Manuel Albetis-Apolaya, Ronnie Gavilan-Chavez, Manolo Fernández-Sánchez, Manolo Fernández-Díaz

PMC · DOI: 10.1128/mra.01314-25 · 2026-01-14

## TL;DR

This paper characterizes a Salmonella strain from Peruvian swine, analyzing its antibiotic resistance and genome.

## Contribution

The study provides new genomic and antimicrobial resistance data for a Salmonella Rissen strain from Peru.

## Key findings

- The strain FARPER-637 carries resistance genes blaTEM-1B, tet(A), and qnrB19.
- Phenotype-genotype agreement was observed except for colistin resistance.
- No plasmid-mediated resistance genes were found for colistin resistance.

## Abstract

We report the antimicrobial susceptibility profile and genomic features of the Salmonella enterica serovar Rissen strain FARPER-637 isolated from Peruvian swine in 2025. Nanopore sequencing revealed blaTEM-1B, tet(A), and qnrB19. Phenotype–genotype concordance was observed except for colistin, which lacked known plasmid-mediated resistance determinants.

## Linked entities

- **Genes:** tet(A) (tetracycline efflux MFS transporter Tet(A)) [NCBI Gene 33941499]

## Full-text entities

- **Species:** Sus scrofa (pig, species) [taxon 9823]

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Source: https://tomesphere.com/paper/PMC12896275