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[Clinical features of meningococcal infection in subjects with deficient terminal components of complement]
Aim:
To evaluate clinical characteristics of meningococcal disease (MD) in individuals with terminal complement component deficiency (TCCD) who are thousands times more susceptible to MD than complement-sufficient persons.
Materials And Methods:
61 cases of MD in TCCD patients and 200 randomly selected cases of MD in complement-sufficient patients were analyzed.
Results:
Meningitis without meningococcemia accounted for 17% of the MD episodes in the control group of complement-sufficient patients but none in individuals with TCCD who had meningococcemia (10%) or meningococcemia with meningitis (90%). Moderate disease predominated in patients with TCCD (70%) and no episodes of fatal disease were noted, whereas severe disease was more common in the control group which had an 8% case fatality rate and frequent complications such as endotoxic shock (15% of episodes) and brain edema (26%). The severity of the disease in TCCD patients did not differ between the first and subsequent episodes, between males and females, between episodes caused by serogroup A and B meningococci, etc.
Conclusion:
In comparison to complement-sufficient persons, the course of the disease in patients with TCCD is statistically less severe.
Insights
Individuals with terminal complement component deficiency (TCCD) experience less severe meningococcal disease (MD) compared to complement-sufficient individuals. This study found TCCD patients had fewer severe outcomes and no fatalities from MD.
Area of Science:
- Immunology
- Infectious Diseases
- Genetics
Background:
- Terminal complement component deficiency (TCCD) significantly increases susceptibility to meningococcal disease (MD).
- Understanding the clinical presentation of MD in TCCD patients is crucial for risk stratification and management.
Purpose of the Study:
- To compare the clinical characteristics and severity of meningococcal disease (MD) in individuals with terminal complement component deficiency (TCCD) versus complement-sufficient individuals.
Main Methods:
- A retrospective analysis of 61 MD cases in TCCD patients.
- Comparison with 200 randomly selected MD cases in complement-sufficient patients.
Main Results:
- Meningococcal disease in TCCD patients predominantly presented as meningococcemia (10%) or meningococcemia with meningitis (90%), unlike complement-sufficient individuals where meningitis without meningococcemia occurred (17%).
- Moderate disease was more common in TCCD patients (70%), with no fatal outcomes, whereas complement-sufficient patients experienced severe disease (8% case fatality rate) and complications like endotoxic shock and brain edema.
Conclusions:
- Meningococcal disease in individuals with TCCD is statistically less severe than in complement-sufficient persons.
- TCCD patients demonstrate a different clinical spectrum of MD, characterized by a lower incidence of severe disease and mortality.