Question

question 1 (1 point)
there appears to be a well - developed natural immunity to meningococcus in most
populations, therefore the infection rate is low.
a) true
b) false
question 2 (1 point)
streptococcus pneumoniae (\the pneumococcus\)
a) causes petechiae in the extremities.
b) has no effective vaccine.
c) is the most frequent cause of community - acquired meningitis.
d) is a gram negative diplococcus.

Explanation:

Question 1

Natural immunity to meningococcus is not well - developed in most populations. Meningococcal infections can still occur, especially in certain age groups (e.g., young children and adolescents) and in settings like crowded living conditions.

• Option A: Petechiae in the extremities are more commonly associated with meningococcal infections rather than Streptococcus pneumoniae.
• Option B: There are effective vaccines against Streptococcus pneumoniae, such as the pneumococcal conjugate vaccine (PCV) and pneumococcal polysaccharide vaccine (PPV).
• Option C: Streptococcus pneumoniae is the most frequent cause of community - acquired meningitis.
• Option D: Streptococcus pneumoniae is a Gram - positive diplococcus.

Answer:

B) False

Question 2