Application method of a biological preparation prepared by Lactobacillus acidophilus xd13r in reducing the proportion of drug-resistant bacteria in pets
A technology of Lactobacillus acidophilus and biological preparations, applied in the direction of bacteria, applications, animal feed, etc., can solve the problems of pet health impact, low health index, high poisoning index, etc., to eliminate sub-health status, improve health index, and reduce poisoning index effect
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Embodiment 1
[0024] Domestication and screening of Lactobacillus acidophilus strain XD13R: 4 strains of Bacillus (XD05B-XD08B), 3 strains of lactic acid bacteria (XD05R-XD07R), and 1 strain of yeast (XD05J) were purchased from the Culture Collection Center of Guangdong Institute of Microbiology. Guangzhou Baijia Supermarket purchased 2 strains of yeast (XD06J-XD07J), and then isolated and screened 8 strains of lactic acid bacteria (XD08-RXD15R) that were different from the above-mentioned strains in plaque shape and cell shape from nature, and collected a total of 4 strains Bacillus (XD05B-XD08B), 11 strains of lactic acid bacteria (XD05R-XD15R), and 3 strains of yeast (XD05J-XD07J), and then they were subjected to 10 generations of mutagenesis culture in pig manure environment with high proportion of drug-resistant bacteria, and finally selected A bacterial strain that can adapt to the above-mentioned pig manure water environment and can reduce the proportion of drug-resistant bacteria is ...
Embodiment 2
[0028] (1) Preparation of Lactobacillus acidophilus XD13R bacterial liquid: inoculate fresh culture of Lactobacillus acidophilus XD13R into 10~20 500ml Erlenmeyer flasks filled with MRS medium, and cultivate in an incubator at 30°C After 48 hours, the XD13R bacterial liquid was obtained.
[0029] (2) Preparation of medium: with sucrose, peptone, yeast extract, KH 2 PO 4 , tomato juice and water are the main raw material preparation medium, and their weight percentages are:
[0030] Sucrose 4%, peptone 2.5%, yeast extract 1%, KH 2 PO 4 1%, tomato juice 4%, water balance.
[0031] (3) Take the above-mentioned Lactobacillus acidophilus XD13R bacterial liquid and inoculate it into the above-mentioned culture medium sterilized by high temperature, adjust the initial pH to 5~6.5, carry out anaerobic fermentation in the fermenter for 15 days, until the final pH is 3~6.5 4. Obtain the biological preparation prepared by the Lactobacillus acidophilus.
Embodiment 3
[0033] (1) Preparation of Lactobacillus acidophilus XD13R bacterial liquid: Inoculate fresh culture of Lactobacillus acidophilus XD13R into 10~20 500ml Erlenmeyer flasks filled with MRS medium, and cultivate in an incubator at 38°C After 40 hours, the XD13R bacterial liquid was obtained.
[0034] (2) Preparation of medium: with sucrose, peptone, yeast extract, KH 2 PO 4 , tomato juice and water are the main raw material preparation medium, and their weight percentages are:
[0035] Sucrose 4%, peptone 2.5%, yeast extract 1%, KH 2 PO 4 1%, tomato juice 4%, water balance.
[0036] (3) Take the above-mentioned Lactobacillus acidophilus XD13R bacterial liquid and inoculate it into the above-mentioned culture medium that has been sterilized at high temperature, adjust the initial pH to 5~6.5, and carry out anaerobic fermentation in the fermenter for 4 days, until the final pH is 3~6.5. 4. Obtain the biological preparation prepared by the Lactobacillus acidophilus.
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