Enterococcus faecium resistant to chromium (vi) and isolation method and application thereof

By screening and isolating chromium-resistant (VI) Enterococcus faecium CREN0318, the problem of insufficient tolerance and adsorption capacity of existing Enterococcus faecium to high concentrations of chromium was solved, achieving efficient remediation of chromium-contaminated matrix and protection of poultry health.

CN122168457APending Publication Date: 2026-06-09JIANGSU INST OF POULTRY SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU INST OF POULTRY SCI
Filing Date
2026-01-27
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing Enterococcus faecalis has limited tolerance and adsorption capacity to high concentrations of hexavalent chromium, making it difficult to effectively apply to the remediation of chromium-contaminated substrates. Furthermore, there are no specific antidotes to control chromium poisoning in poultry.

Method used

Chromium-resistant (VI) Enterococcus faecalis strain CREN0318 (CGMCC NO.36330) was screened and obtained. It was isolated in a high-chromium environment using a specific isolation method and applied to chromium-contaminated substrates, exhibiting high chromium adsorption capacity and antibacterial properties.

Benefits of technology

Chromium-resistant (VI) Enterococcus faecalis survives at chromium (VI) concentrations up to 800 mg/L. It exhibits a high adsorption rate of 97.5% to 98.5% for 5 mg/L chromium (VI) solution within a pH range of 4 to 6, reducing chromium residues in feed and inhibiting the growth of Staphylococcus aureus and Salmonella.

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Abstract

This invention discloses a chromium (VI)-resistant Enterococcus faecium, its isolation method, and its applications in the field of microbial technology. This chromium (VI)-resistant Enterococcus faecium, classified and named Enterococcus faecium, was deposited on October 24, 2025, at the China General Microbiological Culture Collection Center (CGMCC), with accession number CGMCC NO.36330. The chromium (VI)-resistant Enterococcus faecium isolated by this invention can survive in high-concentration chromium (VI) environments and has a strong adsorption effect on hexavalent chromium, reducing the residue and bioaccumulation of hexavalent chromium in feed, thereby mitigating its toxicity to poultry.
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