Uricolytic Bacillus from medicinal-edible plants ameliorates hyperuricemia in geese

Humans and poultry are both susceptible to hyperuricemia, due to mutations in the uric acid oxidase gene. Chinese medicinal-edible plants have been extensively utilized in the management of hyperuricemia. Extracts of medicinal-edible plants have been extensively studied in the treatment of hyperuricemia. However, the endophytic bacteria in these medicinal-edible plants have been rarely studied. In the present study, four strains of Bacillus with uricolytic activity were isolated and identified from four medicinal-edible plants. The strain with the highest uricolytic activity comes from sunflowers and is a novel species named XRK-1. The 16 S rRNA sequence of XRK-1 shares 96.3% homology with the most similar Ornithinibacillus salinisoli LCB256 (14-AUG-2023). After evaluating the safety and the tolerance of acid and choline in vitro, XRK-1 with 10⁷ CFU/kg was added to goose feed daily for 3 weeks. The results of the preliminary animal trials showed that the serum uric acid levels of 1-day-old and 21-day-old geese fed with XRK-1 decreased by 32.5% and 15.0% respectively compared to the control group. These findings suggest that endophytes with uricolytic activity in medicinal-edible plants play a certain role in the management of hyperuricemia in plant dietary therapy.