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Autoclaved Sample

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.a. It could be seen that there was a difference in the patterns between the untreated, 70 degree treated, and autoclaved samples. In the untreated control area the colony is composed of several closely packed moderate sized colonies; they are white in colour, opaque, raised, circular, with the outer ridge of the mass of colonies being somewhat irregular in shape. For the 70 degree treated sample the findings were about the same; moderate sized colonies, white in colour, opaque, convex, circular, with the outer edge of the mass of colonies having an irregular shape. The biggest difference was seen the autoclaved sample, as this sample had little to no colonial growth. What can be observed are some small irregularly shaped colonies, which are …show more content…

A physical kind of antimicrobial treatment is the heating of milk for pasteurization, increasing the shelf life of milk by reducing its overall microbial load. This method is the best because it does not add anything to the milk. A strong chemical for antimicrobial treatment is the preservation of meat or other food through preservatives. The presence of nitrates or high sodium content can cause foods to keep much longer and kill off addition microbes which attempt to form on the product, this is beneficial to other methods as you do not need to physically alter the product with heat or other physical changes which causes changes in the composition of the product. Broad spectrum antimicrobial agents are good for things such as hand sanitizer, one would want to antimicrobial agent which affects as many different strains of bacteria as possible. Narrow spectrum antimicrobial agents would be good if a particular bacteria which was know to be effected by this agent was being experimented with, this is better for emergency situations such as some of the agents which can combat anthrax.

6. There are bacteria everywhere but we do not get sick from them all the time due to our immune systems. Our immune systems are constantly fighting intruders in the body that can be considered hostile. Once the bacteria is identified by the body special immune cells literally attack and eat the bacteria. By using the chemical markers which were present in that bacteria the immune cells which identify threats can then be prepared to identify them in case of for another

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