Two Bacillus species are considered medically significant: B. anthracis, which causes anthrax, and B. cereus, which causes food poisoning similar to that caused by Staphylococcus.[4] A third species, B. thuringiensis, is an important insect pathogen, and is sometimes used to control insect pests. The type species is B. subtilis, an important model organism. It is also a notable food spoiler, causing ropiness in bread and related food. Some environmental and commercial strains B. coagulans may play a role in food spoilage of highly acidic, tomato based products.
An easy way to isolate Bacillus is by placing nonsterile soil in a test tube with water, shaking, placing in melted mannitol salt agar, and incubating at room temperature for at least a day. Colonies are usually large, spreading and irregularly shaped. Under the microscope, the Bacillus cells appear as rods, and a substantial portion usually contain an oval endospore at one end, making it bulge.
Two Bacillus species are considered medically significant: B. anthracis, which causes anthrax, and B. cereus, which causes food poisoning similar to that caused by Staphylococcus.[4] A third species, B. thuringiensis, is an important insect pathogen, and is sometimes used to control insect pests. The type species is B. subtilis, an important model organism. It is also a notable food spoiler, causing ropiness in bread and related food. Some environmental and commercial strains B. coagulans may play a role in food spoilage of highly acidic, tomato based products.
An easy way to isolate Bacillus is by placing nonsterile soil in a test tube with water, shaking, placing in melted mannitol salt agar, and incubating at room temperature for at least a day. Colonies are usually large, spreading and irregularly shaped. Under the microscope, the Bacillus cells appear as rods, and a substantial portion usually contain an oval endospore at one end, making it bulge.
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