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Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery
Published on: November 5, 2019
Abstract:
Neisseria meningitidis is an encapsulated Gram-negative diplococcus which colonises the upper respiratory tract without causing symptoms in up to 25% of the population. At least 13 different serogroups cause invasive meningococcal disease (IND). In the UK serogroup B causes more than 80% of cases of invasive disease. More than 75% of cases occur in the under 5s, reflecting the lack of ability of the immature immune system to mount an effective response to the polysaccharide capsule of the organism. There is also a peak around adolescence. Meningococcal disease can present with features of septicaemia, fever, purpura, and rapidly progressive shock, or with meningitis which can occur without a rash. Many cases have a mixed picture. Young infants with meningitis may not display the classical signs, but appear unwell, lethargic and floppy Petechiae which start to spread, become purpuric, occur in association with signs of shock or meningitis, or in any child who appears ill should always be treated as IMD until proven otherwise. Any child with symptoms and signs suggestive of IMD and a non-blanching rash should be transferred to hospital as an emergency immediately. IM (or IV) benzylpenicillin (or ceftriaxone) should be given at the earliest opportunity, but treatment should not delay transfer. if the child does not have features suggestive of IMD at the time of initial assessment it is important to give parents advice regarding symptoms and signs which may suggest deterioration.
Insights
Neisseria meningitidis, a common bacterium, can cause severe invasive meningococcal disease (IMD), particularly in young children and adolescents. Prompt recognition and emergency treatment are crucial for improving outcomes in suspected IMD cases.
Area of Science:
- Microbiology
- Infectious Diseases
- Pediatrics
Background:
- Neisseria meningitidis colonizes the upper respiratory tract asymptomatically in up to 25% of individuals.
- Invasive meningococcal disease (IMD) is caused by at least 13 serogroups, with serogroup B predominant in the UK.
- IMD predominantly affects children under 5 and adolescents due to immature or developing immune responses.
Purpose of the Study:
- To highlight the clinical presentation and management of invasive meningococcal disease.
- To emphasize the importance of early recognition and treatment in pediatric IMD.
- To provide guidance on identifying and managing suspected IMD cases in children.
Main Methods:
- Review of clinical presentations of meningococcal disease, including septicaemia and meningitis.
- Discussion of diagnostic challenges in young infants.
- Emphasis on clinical signs suggestive of IMD, such as non-blanching rashes and shock.
Main Results:
- Meningococcal disease presents with septicaemia, meningitis, or a mixed picture, often without a rash in infants.
- Petechiae progressing to purpura, especially with shock or meningitis signs, warrants immediate IMD treatment.
- Early administration of antibiotics like benzylpenicillin or ceftriaxone is critical.
Conclusions:
- Prompt medical evaluation and emergency transfer are vital for children with suspected IMD and a non-blanching rash.
- Antibiotic treatment should be initiated as soon as possible, without delaying transfer.
- Parental education on recognizing worsening symptoms is essential for timely intervention.
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