Work

Multidrug and vancomycin-resistant Enterococcus isolates in different productive stages of a poultry farm

Year: 2025

Type: article

Abstract: • VRE was found at different poultry farm stages. • MDR and VRE were isolates from carcasses and chickens. • Healthy chickens may be MDR–VRE reservoirs, requiring further surveillance. The poultry industry represents an important economic sector in Argentina. In this study we recovered 26 vancomycin-resistant Enterococcus (VRE) isolates from different productive stages of a poultry farm located in Tandil, Argentina. Ten isolates were Enterococcus faecium and seven, Enterococcus faecalis . Total resistance to vancomycin (96.2%), erythromycin (80.8%), levofloxacin (57.7%), chloramphenicol (26.7%), penicillin (23.1%), ampicillin (7.7%) was detected and 20 isolates (76.9%) were identified as multidrug-resistant (MDR). With respect to the distribution of glycopeptide resistance genes, 57.7% of the isolates harbored the vanC-1 gene, and 11.5%, carried the vanC-2/C-3 gene. The vanA and vanB variants were not detected. This study provides evidence that healthy chickens from the studied region can be a reservoir of MDR–VRE. Further surveillance should be conducted to control their dissemination through the food chain. La industria avícola representa un sector económico importante en Argentina. En el presente estudio se obtuvieron 26 aislamientos de Enterococcus resistentes a vancomicina (ERV) en diferentes etapas productivas de una granja avícola ubicada en Tandil, Argentina. De los aislamientos obtenidos, 10 correspondieron a Enterococcus faecium y 7 a Enterococcus faecalis . Se detectó resistencia a vancomicina (96,2%), eritromicina (80,8%), levofloxacina (57,7%), cloranfenicol (26,7%), penicilina (23,1%) y ampicilina (7,7%). Veinte aislamientos (76,9%) fueron multirresistentes (MDR). En cuanto a la distribución de los genes de resistencia a glicopéptidos, el 57,7% de los aislamientos presentó el gen vanC-1 y el 11,5% presentó vanC-2/C-3 . No se detectaron las variantes vanA ni vanB . Este estudio aporta evidencia de que los pollos sanos de la región estudiada pueden ser reservorios de ERV MDR y destaca la necesidad de continuar con la vigilancia para controlar su diseminación a través de la cadena alimentaria.

Source: Revista Argentina de Microbiología

DOI: 10.1016/j.ram.2025.10.001

Authors: Juliana González, Constanza Pifano García, Juliana Cantón, María José Izaguirre, María Soledad Ríos, Andrea Mariel Sanso

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, Centro Científico Tecnológico - Tandil

Language: English

Topic: Antibiotic Resistance in Bacteria

Subfield: Molecular Medicine

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDGs: Zero hunger, Good health and well-being

Open Access status: gold

Estimated APC paid: $1,200