Viridans Group a hemolysis 1. Main biological features a. Cell shape, arrangemen
ID: 147352 • Letter: V
Question
Viridans Group a hemolysis
1. Main biological features
a. Cell shape, arrangement, Gram stain, endospores, capsule, unusual features.
2. Clinical Manifestations
a. List the diseases that are produced by this microorganism.
3. Mechanism of Disease
a. List of how the microorganism induces disease: Toxin, proteolysis, pyogenic, immunological mechanism or multiple mechanisms.
4. Transmission
a. How the microorganism is transmitted and who is at risk of acquiring the infection.
5. Prevention
a. List the most common prevention methods
b. Is there a vaccine?
6. Treatment
a. Is antimicrobial intervention necessary?
b. Have resistant strains been detected?
c. List the common methods of treatment (you don’t need to list drug names).
d. Prognosis – Mortality associated with the disease
Explanation / Answer
1. The main biological features:
viridans are commensal group of gram positive bacteria. These are belonging to Streptococcus genus.
Being belonging to Streptococcus genus, they are spherical in shape and chain like arranged. Gram positive bacteria. It can't form endospores. It does not have capsule.
2.Clinical manifestations:
These bacteria cause bacteremia in neutropenic patients. When they are introduced into the bloodstream, they cause subacute valvular heart disease or endocarditis.
3. Mechanism of disease
In healthy persons, S.viridans does not cause any disease. But when the persons become immunocompromised or when the valves of the heart are damaged in condition or weak in condition, then S.viridans cause the disease.
4.Transmission
Streptococci are the commensals in human beings. Hence, at an opportunistic condition, they will cause the diseases, such as endocarditis, bacteremia.
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