Streptococci Organism in Upper Respiratory Tract
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Explain why organisms in the upper respiratory tract might change when the normal flora is replaced with transient flora.
Explain why it is important not to touch any other area of the mouth except the pharyngeal membranes when taking a throat culture.
One test for the identification of group A streptococci is the latex agglutination test. Describe how the test identifies group A streptococci?
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Solution Summary
Streptococci is analyzed in this posting. An explanation of why this organism in the upper respiratory tract might change when the normal flora is replaced with transient flora.
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Explain why organisms in the upper respiratory tract might change when the normal flora is replaced with transient flora:
The resident flora consists of relatively fixed types of microorganisms that are regularly found in a given area at any given age. If these are disturbed, the resident flora readily will re-establish itself. The transient flora consists of non-pathogenic or potentially pathogenic microorganisms that may take up residence in an area for hours, days, or weeks. This flora originates from the environment, does not produce disease, and does not establish permanent residency on the surface. Transient flora area usually of little significance as long as the normal resident flora remains intact. However, if the resident flora is disturbed, overtaken by transient flora, then these transient microorganisms may colonize, proliferate, and cause disease. The resident floras that are constantly present and continually flourish are subject to factors such as temperature, moisture, and the presences of certain nutrients and inhibitory substances. They act to also prevent disease via "bacterial interference", the mechanism of bacterial interference may involve competition for receptors or binding sites on host cells or nutrients, or a variety of other mechanisms. If suppression of the resident flora takes place, a partial localized void is created that tends to be filled by organisms from the environment or from ...
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