Salmonella BacteriaBrevibacterium linens Thermophilic Bacteria
                          By: Jacob Fischer



An organism that Brevibacterium linens interacts with is Geotrichum candidum during the cheese making process. These interactions are affected by pH and salt concentrations. When it came to pH levels, Brevibacterium linens stimulated the growth of G. candidum. The preferred pH levels for growth of these organisms were at 5.0 and 7.0. When 1.5% salt was added to the growth medium, the growth of these organisms was the greatest. However, as you added more than that amount of salt, the growth was inhibited.

On top of this, another interaction that B. linens has is with human skin. This is a commensal relationship because B. linens gains a better position; however, the human is not harmed or helped by this symbiotic relationship. Symbiotic relationships are relationships in which two organisms "live together". The main types of symbiotic relationships are mutualism, commensalism, and parasitic.
In a mutualistic relationship, both organisms benefit from the others presence.
In a commensalistic relationship, one organism benefits while the other is neither harmed nor benefited.
In a parasitic relationship, one organism benefits; however, the other organism is harmed in some way.


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