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Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery
Published on: November 5, 2019
A REPORT ON ANTIMENINGITIS VACCINATION AND OBSERVATIONS ON AGGLUTININS IN THE BLOOD OF CHRONIC MENINGOCOCCUS CARRIERS
1Base Hospital, Fort Riley, Kansas, and The Rockefeller Institute for Medical Research, New York.
Abstract:
1. A meningococcus vaccine suspended in salt solution has been given subcutaneously as a prophylactic to about 3,700 volunteers in three injections of 2,000 million, 4,000 million, and 4,000 or 8,000 million cocci at weekly intervals. 2. These doses rarely caused more than the mildest local and general reactions. Exceptionally a more severe reaction emphasized the presence of an unusual individual susceptibility to the vaccine. In such instances the symptoms were in part those of meningeal irritation and sometimes simulated the onset of meningitis. 3. Specific meningococcus agglutinins have been demonstrated in the blood serum of vaccinated men as compared with normal controls. 4. Moreover, agglutinins have been demonstrated in the blood serum of chronic carriers of the meningococcus. Evidence is thus brought forward that the relative immunity of chronic carriers to epidemic meningitis may be due to the presence of specific antibodies in the blood stream.
Insights
A meningococcus vaccine was administered to volunteers, demonstrating the presence of specific antibodies in vaccinated individuals and chronic carriers. This suggests antibodies may confer immunity against epidemic meningitis.
Area of Science:
- Immunology
- Vaccinology
- Epidemiology
Background:
- Meningococcal infections pose a significant public health threat.
- Understanding the immune response to meningococcus is crucial for developing effective prevention strategies.
Purpose of the Study:
- To evaluate the safety and immunogenicity of a meningococcus vaccine.
- To investigate the presence of specific antibodies in vaccinated individuals and chronic carriers.
Main Methods:
- Subcutaneous administration of a meningococcus vaccine to approximately 3,700 volunteers over three weekly intervals.
- Monitoring for local and general reactions post-vaccination.
- Serological analysis to detect specific meningococcus agglutinins in blood serum.
Main Results:
- Vaccination with meningococcus vaccine generally resulted in mild reactions.
- Specific meningococcus agglutinins were detected in the blood serum of vaccinated individuals.
- Agglutinins were also identified in the blood serum of chronic meningococcus carriers.
Conclusions:
- The meningococcus vaccine is generally well-tolerated.
- Vaccination induces a specific immune response, evidenced by agglutinin production.
- The presence of specific antibodies in chronic carriers may explain their relative immunity to epidemic meningitis.
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