Discuss the origin, common characteristics, common tests/results, treatments, and use of the following:
1. Bacillus subtilis
2. Staphylococcus aureus
3. Rhodospirillum rubrum
4. Serratia marcescens
5. Bacillus thuringiensis
6. Escherichia coli
7. Mycobacterium smegmatis
8. Proteus vulgaris
9. Streptococcus agalactiae
10. Enterobacter aerogenes
11. Pseudomonas aeruginosa
12. Clostridium butyricum
Please provide a conclusion that discusses how these microorganisms respond in various staining, biochemical, and classification testings as well as how these microorganisms relate to the health or medical field.
Bacilius subtilis - a spheical Gram + bacterium that can form very tough endospores. Rarely pathogenic, but when it manages to overpopulate the human GI, can cause food poisoning via release of too much endotoxins. It typically doesn't affect normal individuals, but immunocompromised patients may be at risk. Treatment would be that of cephalosporins for Gram + bacteria. This bacterium is a fairly stable organism when subjected to genetic modification, and is thus used as extensively as E. coli in labs as a model organism.
Staph aureus - Gram + coccal bacterium that is a facultative anaerobe (can use cellular respiration if oxygen present). One of the most implicated pathogens for food poisoining, it does so via the release of endotoxins and enzymes like hyraluronidase, which degrades tissues locally. Since it's Gram +, typical antibiotics for this class are effective, including cephalosporins. Antibiotic resistant strains do exist, specifically MRSA is the key organism that has been the focus of intensive study for potential treatment, and a worry for many immunocompromised patients as it currently doesn't respond to the strongest antibiotic.
Rhodospirillum rubrum - Gram negative facultative anaerobe. Not pathogenic, but used extensively in biotechnology because it is one of the first bacteria to have been identified as a nitrogen fixer. It can take nitrogen from the environment, express an enzyme called nitrogenase and catalyse the ...
The expert discusses the origin, common characteristics, common tests/results, treatments and the uses of organisms are determined.