# Multidrug-resistant Klebsiella pneumoniae ST70 harboring blaNDM in a migratory Penguin

**Authors:** Sandryelle Merces Freire, Annelise Kyllar, Marina Côrtes, Thiago P. G. Chagas, Felipe Pinheiro, Renata F. A. Pereira, Fabio Aguiar-Alves, Bruno Penna

PMC · DOI: 10.1038/s41598-025-97816-4 · 2025-07-01

## TL;DR

A penguin rescued in Brazil was found to carry a multidrug-resistant bacteria strain, highlighting the role of migratory animals in spreading antibiotic resistance.

## Contribution

Identifies a migratory penguin as a carrier of a multidrug-resistant Klebsiella pneumoniae ST70 strain with blaNDM.

## Key findings

- The penguin was infected with Klebsiella pneumoniae ST70, a strain linked to human hospital infections.
- The bacteria carried resistance genes for carbapenems, beta-lactams, and quinolones.
- The study suggests migratory penguins may spread antimicrobial-resistant bacteria across regions.

## Abstract

The growing prevalence of antimicrobial resistance poses a global threat to human and animal health. In this study, we investigated the occurrence and genetic basis of antimicrobial resistance in a Magellanic Penguin (Spheniscus magellanicus) rescued off the coast of Rio de Janeiro, Brazil. The penguin presented a bacterial infection, identified as Klebsiella pneumoniae. Molecular analysis revealed the presence of several resistance genes, including those that confer resistance to carbapenems, beta-lactams, quinolones, and other classes of antibiotics. The bacterial strain belonged to Sequence Type 70 (ST70), a clone previously associated with human nosocomial infections. This study highlights the potential of migratory penguins as vectors of antimicrobial-resistant microorganisms, emphasizing the need for a One Health approach to address the complex interaction between environmental factors, animal health, and human well-being. The findings underscore the urgency of implementing strategies to mitigate the spread of multidrug-resistant bacteria in natural and urban environments.

## Linked entities

- **Species:** Spheniscus magellanicus (taxon 37081), Klebsiella pneumoniae (taxon 573)

## Full-text entities

- **Diseases:** Klebsiella pneumoniae (MESH:D007710), bacterial infection (MESH:D001424), nosocomial infections (MESH:D003428)
- **Chemicals:** beta-lactams (MESH:D047090), quinolones (MESH:D015363), carbapenems (MESH:D015780)
- **Species:** Klebsiella pneumoniae (species) [taxon 573], Homo sapiens (human, species) [taxon 9606], Spheniscus magellanicus (Magellanic penguin, species) [taxon 37081]

## Figures

4 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12216447/full.md

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Source: https://tomesphere.com/paper/PMC12216447