We appreciate your visit to Which of the following explains why Streptococcus pneumoniae can infect an individual recurrently A The development of lasting immunity B Frequent mutations in the bacterial. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
Streptococcus pneumoniae can infect an individual recurrently due to its ability to alter its surface proteins (antigenic variation) and its production of a protective capsule that impairs immune cell attack.
Explanation:
The recurrent infection of an individual by Streptococcus pneumoniae can be explained by its use of a mechanism known as antigenic variation. This process involves the alteration of surface proteins, which allows the bacterium to avoid recognition by the host's immune system.
In addition, Streptococcus pneumoniae has a well-documented ability to produce a capsule, making it more difficult for phagocytic cells to engulf and kill. Antibodies created against previous variations of the bacterium often prove ineffective against new forms due to this antigenic variation.
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