79. Assessment of the acute and subacute toxicity of Bacillus spp. on experimental animals

Pham Thi Ngoc Diep, Bui Thi Viet Ha, Nguyen Van Do, Nguyen Khanh Hoa, Nguyen Thi Thanh Huong

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Abstract

The study was performed to evaluate the acute and subacute toxicity tests on animals of the Bacillus spp. (B. subtilis, B. coagulans, B. clausii with concentration 1x109 CFU/mL). Acute toxicity study on Swiss mice by oral administration using the fixed dose method. A subacute toxicity study was conducted on Albino rabbits. The results of acute toxicity study showed that probiotics administered orally at a single dose up to 5000 mg/kg/day (2x1010 CFU/kg/day) did not cause toxicity, the lethal dose LD50 has not been determined. In the sub-chronic toxicity study, mild liver degeneration appeared in both the group of 1 g/kg/day and 5 g/kg/day compared to the control group. However, blood test results showed that liver function indexes (AST, ALT, GGT) and kidney function (Creatinine, Urea) were similar between the groups using the product and the control group. The difference was not statistically significant (p > 0.05). Thus, Bacillus sp. VN does not cause acute toxicity when administered orally at doses up to 5000 mg/kg. Using two dose levels of 1 and 5 g/kg/day is relatively safe in subacute toxicity.

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References

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