Certified Neuroscience Registered Nurse (CNRN) Practice Exam

Which pathogen is most commonly responsible for causing bacterial meningitis in adolescents and young adults?

1. Streptococcus pneumoniae

2. Escherichia coli

3. Neisseria meningitides

4. Staphylococcus aureus

The correct answer is: Neisseria meningitides

The pathogen most commonly responsible for causing bacterial meningitis in adolescents and young adults is Neisseria meningitidis. This bacterium is a leading cause of meningococcal meningitis, particularly in this age group. Adolescents and young adults are at a higher risk due to behaviors that increase exposure, such as close living situations in dormitories or communal settings, which facilitate the transmission of the bacterium. Neisseria meningitidis is notable for its ability to cause outbreaks, especially in college campuses, and can lead to severe cases rapidly. Vaccination against this pathogen has become a critical part of public health strategies aimed at reducing the incidence of meningitis in this demographic. While other pathogens mentioned can cause meningitis, they are less commonly associated with this age group. Streptococcus pneumoniae is more prevalent in younger children and older adults, Escherichia coli is primarily a concern in neonates, and Staphylococcus aureus is not a leading cause of bacterial meningitis compared to Neisseria meningitidis. Therefore, the recognition of Neisseria meningitidis as the main pathogen in adolescents and young adults is supported by epidemiological data and clinical observations.