Which pathogen is known to cause meningitis in adolescents and young adults?

Neisseria meningitidis is the pathogen most commonly associated with causing meningitis in adolescents and young adults. It is a gram-negative bacterium known for its association with outbreaks of meningococcal disease, particularly in crowded settings such as dormitories or military barracks. This pathogen can rapidly cause serious infections, leading to meningitis and sepsis.

The reason Neisseria meningitidis is particularly prevalent in this age group is due to several factors, including lifestyle choices that can increase exposure and transmission. Additionally, certain serogroups of N. meningitidis, especially serogroup B, are more common among adolescents and young adults. Vaccination against this bacterium is therefore a key public health strategy to protect this demographic from meningococcal disease.

While other pathogens mentioned can also cause meningitis, their prevalence varies by age group and specific circumstances. For example, Streptococcus pneumoniae is a leading cause in younger children and older adults but also impacts other age groups. Escherichia coli is generally associated with neonatal meningitis. Haemophilus influenzae type b, although historically significant in causing meningitis in children, has seen a decline due to the effectiveness of vaccination. This makes Neisseria meningitidis