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Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery
Published on: November 5, 2019
[Vaccines against meningococcal disease]
1Centro de Vigilância Epidemiológica, Secretaria Estadual de Saúde, São Paulo.
Abstract:
The meningococcal disease has been a source of preoccupation all over the world. Epidemics have been registered periodically in developed or developing countries. The most frequent meningococci are those concerned with serogroups A, B and C. Researches to develop effective vaccines against the disease have been taking place since the 40's. Presently, only vaccines against the meningococci from the serogroups A, C, Y and W-135 are available. These vaccines have important limitations both due to the age range that they protect and the period of time that the protection lasts. They are not routinely used in vaccination programs and are indicated only in risky situations. This demands a strict epidemiological surveillance of the disease. There are no vaccines against the serogroup B meningococci with recognized effectiveness, although, in the last decades, many have been tested. There are perspectives of important advances in this area, mainly with the development of conjugated vaccines, like the Haemophilus influenzae type B vaccine. Until the present, the chemoprophylaxis of the intimate communicants of a case is the best way to avoid secondary cases.
Insights
Meningococcal disease outbreaks are a global concern. Current vaccines protect against serogroups A, C, Y, and W-135 but have limitations, with no effective vaccines available for serogroup B.
Area of Science:
- Microbiology
- Epidemiology
- Vaccinology
Context:
- Meningococcal disease poses a significant global health threat, with periodic epidemics reported worldwide.
- Neisseria meningitidis serogroups A, B, and C are the most prevalent and concerning.
- Existing vaccines target serogroups A, C, Y, and W-135 but have limitations in age range and duration of protection.
Purpose:
- To review the current landscape of meningococcal vaccines and chemoprophylaxis strategies.
- To highlight the challenges in developing effective vaccines, particularly against serogroup B.
- To discuss future perspectives in meningococcal disease prevention.
Summary:
- Vaccines against meningococcal serogroups A, C, Y, and W-135 are available but not routinely used due to limitations.
- No consistently effective vaccines exist for serogroup B meningococci, necessitating ongoing research.
- Chemoprophylaxis for close contacts remains the primary method to prevent secondary cases.
Impact:
- Emphasizes the need for improved meningococcal vaccines, especially for serogroup B.
- Underscores the importance of continued epidemiological surveillance for meningococcal disease.
- Suggests that conjugated vaccine technologies may offer future breakthroughs in prevention.
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