Friday, 25 December 2015

MDS entrance preparations | Test used to differentiate streptococcus pneumonia from other alpha haemolytic streptococcus


Test used to differentiate streptococcus pneumonia from other alpha haemolytic streptococcus are 

a. CAMP reaction 
b. Biken test 
c. Optochin sensitivity 
d. Bacitracin susceptibility


Correct Ans C

Pneumococcal endocarditis is associated with rapid destruction fo heart valves

Streptococcus pneumonia is a capsulated gram positive diplococcic sensitive to optochin and soluble in bile. Colonies and Blood agar shows alphahaemolysis with draughtsman colonies, Strep pneumonia causes middle ear infections, sinusitis, bronchitis, peritonela infection, eye infections. Pneumococcal pneumonia occurs in extremes of age. Inapparent pneumococcal focus can prove fatal in splenectomised patients. Septic arthritis, purulent pericarditis occurs. Endocarditis causes rapid destruction of valves. 

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