Bacillus tropicus strain sb2-4 and use thereof

Abstract

A strain of Bacillus tropicalis SB2-4 has been developed to address the high mortality rate of shrimp commonly associated with high-density aquaculture. This strain, Bacillus tropicalis SB2-4, is housed at the Food Industry Research and Development Institute of the Republic of China (accession number BCRC 911290). It enhances the disease resistance of shrimp, thereby maintaining a certain survival rate even when the aquaculture environment deteriorates.

Claims

1. A strain of Bacillus tropicalis SB2-4, used to reduce the risk of death of freshwater long-armed shrimp due to infection with Streptococcus lactis, is deposited at the Food Industry Development Research Institute of the Republic of China, with the deposit number BCRC 911290.

2. The use of a strain of Bacillus tropicalis SB2-4 for the preparation of a drug to reduce the risk of death of freshwater long-armed shrimp due to infection with Streptococcus lactis. The strain of Bacillus tropicalis SB2-4 is deposited at the Food Industry Research and Development Institute of the Republic of China, with the accession number BCRC 911290. The strain of Bacillus tropicalis SB2-4 is administered to a shrimp to improve the survival rate of the shrimp.

3. The intended use of Bacillus tropicalis strain SB2-4 as requested in item 2, wherein, The tropical Bacillus SB2-4 strain was administered to the shrimp via oral feeding.

4. The intended use of Bacillus tropicalis strain SB2-4 as requested in item 3, wherein, The tropical Bacillus SB2-4 strain was mixed with a feed to form a mixture, which was then fed to the shrimp along with the feed.

5. The intended use of the Bacillus tropicalis strain SB2-4 as described in any of requests 2-4, wherein, The tropical Bacillus SB2-4 strain was administered to the shrimp at a dose of 500–10,000 CFU per gram of shrimp body weight per day for 56 consecutive days.

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