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Influence of sodium chloride on growth of Neisseria meningitidis
Applied Microbiology
|July 1, 1972
Abstract:
Nasopharyngeal isolates of Neisseria meningitidis were tested for growth on nutrient agar with and without the addition of 0.8% sodium chloride. Of the 822 strains tested, 1.3% grew on the salt-free medium, and 74.1% grew on the medium supplemented with sodium chloride.
Insights
Most Neisseria meningitidis nasopharyngeal isolates require sodium chloride for growth. Only 1.3% of 822 strains grew without salt, while 74.1% grew with added sodium chloride.
Area of Science:
- Microbiology
- Bacteriology
Background:
- Neisseria meningitidis is a significant human pathogen.
- Understanding the nutritional requirements of N. meningitidis is crucial for its study and control.
Purpose of the Study:
- To investigate the salt tolerance of nasopharyngeal isolates of Neisseria meningitidis.
- To determine the necessity of sodium chloride for the growth of N. meningitidis.
Main Methods:
- Nasopharyngeal isolates of Neisseria meningitidis were cultured.
- Growth was assessed on nutrient agar with and without 0.8% sodium chloride.
Main Results:
- A small proportion (1.3%) of 822 tested strains exhibited growth on salt-free medium.
- A significant majority (74.1%) of strains demonstrated growth on medium supplemented with sodium chloride.
Conclusions:
- Sodium chloride is a critical component for the growth of most Neisseria meningitidis isolates.
- The findings highlight a key nutritional requirement for this bacterium.