Posted on August 8, 2018August 13, 2018 by admin Microbiology: Lab 11, isolating endospores. Bacillus subtilis at 1000x Shaeffer-Fulton Method, infrared contrast filtered. Primary malachite green; secondary safranin. Reference Cappuccino, J. G., & Welsh, C. (2018). Microbiology: A laboratory manual. Post navigationPrevious post: Microbiology: Lab 1, Serratia marcescens.Next post: Microbiology: Lab 13, differential, selective, and enriched media.