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Unformatted text preview: GRAM-POSITIVE BACTERIA a. Bacillus these are rods that produce endospores. Most are nonpathogenic but there are exceptions: 1) Bacillus anthracis causes anthrax. Although this is primarily a disease of cattle, sheep and horses, it can be transmitted to humans. This organism is a large gram-positive rod, nonmotile and facultatively anaerobic. Endospores are centrally located. Since endospores are highly resistant to drying and anthrax endospores are infectious by inhalation, this organism has great potential as an agent of biological warfare. 2) Bacillus thuringiensis is a microbial insect pathogen. Endospores or crystallized toxins of this organism are used as a spray on plants. When ingested by an insect, the toxin causes paralysis of the gut and the insect dies. In some insects the endospores germinate and bacteria contribute to the insects death. Bacteria normally found associated with plant roots have been genetically the insects death....
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.
- Fall '09