Question

Which statement among A-E is incorrect concerning Streptococcus pneumoniae?

A. it produces toxins that destroy ciliated cells in the trachea B. it causes a lower respiratory tract infection C. if untreated, it may lead to meningitis D. it is a Gram-positive coccus, typically in pairs E. it exhibits alpha-hemolysis on blood agar and a vaccine is available for it F. A-E are all correct

Answer 1

The correct answer is : F = A-E all are correct.

Pneumococcal meningitis can occur when theStreptococcus pneumonia bacteria invade the bloodstream, cross the blood-brain barrier and multiply within the fluid surrounding the spine and brain.

Causative agents of lower respiratory infections are viral or bacterial.Viruses cause most cases of bronchitis and bronchiolitis. In community-acquired pneumonias, the most common bacterial agent is Streptococcus pneumoniae.

Streptococcus pneumoniae is a gram-positive coccus.When cultured on blood agar they demonstrate alpha hemolysis.

Steplococcus pneumoniae destroy cilia.The effects included localized loss of cilia, a decrease of the overall ependymal ciliary beat frequency, and damage to the ependymal ultrastructure during meningitis.

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