The document contains up-to-date chemical information, including a summary of the Agency's regulatory position and rationale, on a specific pesticide, Bacillus thuringiensis. A Fact Sheet is issued after one of the following actions has occurred: Issuance or reissuance of a registration standard; Issuance of each special review document; Registration of a significantly changed use pattern; Registration of a new chemical; An immediate need for information to resolve controversial issues relating to a specific chemical or use pattern.