Rabbit Anti-Bacillus Spore antigen Polyclonal antibody for IF. Suitable for use in IFA. Each laboratory should determine an optimum working titer for use in its particular application. Other applications have not been tested but use in such assays should not necessarily be excluded.Bacillus is a genus of Gram-positive rod-shaped bacteria and a member of the division Firmicutes. Bacillus species can be obligate aerobes or facultative anaerobes, and test positive for the en-zyme catalase. Ubiquitous in nature, Bacillus in-cludes both free-living and pathogenic species. Un-der stressful environmental conditions, the cells pro-duce oval endospores that can stay dormant for ex-tended periods. These characteristics originally de-fined the genus, but not all such species are closely related, and many have been moved to other genera.