Related Experiment Videos
Bacterial meningitis in Swaziland: an 18 month prospective study of its impact
Study Objective:
To describe the epidemiology, clinical features, and outcome of bacterial meningitis in Swaziland.
Design:
Prospective study of patients diagnosed as having meningitis of nonviral aetiology during an 18 month period from February 1991 to July 1992.
Setting:
Four regional hospitals covering the population of the four districts in Swaziland.
Subjects:
All patients with non-viral meningitis admitted to hospital within the study period.
Main Results:
Altogether 85 patients were reported to have bacterial meningitis: 48.3% were aged under 1 year. Causative organisms were identified in 60% of cases, and Streptococcus pneumoniae was found to be the commonest (49% of cases). Overall, case fatality was 38.8% for all age groups, and 62.5% (15 of 25) for adults. Neurological sequelae occurred in 22.4%. Three of the adult cases were HIV seropositive. Seizures, but not duration of symptoms before admission, were associated with a poor prognosis. There was a significant rise in incidence related to a period of drought. Fifteen patients were reported with tuberculous meningitis, of whom five were known to be HIV seropositive; the case fatality was 73.3%.
Conclusions:
The aetiology and age distribution of cases of meningitis differs greatly from that in developed countries. Rising HIV infection may have an important impact on the future incidence of meningitis. The high case mortality found should encourage efforts towards earlier diagnosis and treatment, and strengthens the need to develop appropriate vaccines.
Insights
Bacterial meningitis in Swaziland disproportionately affects infants, with Streptococcus pneumoniae as the primary cause. High mortality rates and neurological sequelae highlight the urgent need for improved diagnostics, treatment, and vaccine development.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Bacterial meningitis presents a significant public health challenge, particularly in developing nations.
- Understanding the specific epidemiology and clinical outcomes is crucial for targeted interventions.
Purpose of the Study:
- To investigate the epidemiology, clinical features, and outcomes of bacterial meningitis in Swaziland.
- To identify common causative agents and risk factors associated with poor prognosis.
Main Methods:
- A prospective study was conducted over 18 months in four regional hospitals in Swaziland.
- Patients diagnosed with non-viral meningitis were included, with causative organisms identified in 60% of bacterial meningitis cases.
Main Results:
- Bacterial meningitis affected 85 patients, with 48.3% under one year old. Streptococcus pneumoniae was the most common pathogen.
- Overall case fatality was 38.8%, rising to 62.5% in adults. Neurological sequelae occurred in 22.4% of cases.
- Tuberculous meningitis had a high case fatality of 73.3%, with a notable proportion of HIV-seropositive individuals in both bacterial and tuberculous meningitis cases.
Conclusions:
- The epidemiology of meningitis in Swaziland differs significantly from developed countries, with a potential impact from rising HIV infection rates.
- High case mortality underscores the need for earlier diagnosis, prompt treatment, and the development of effective vaccines.
- The study highlights the critical need for enhanced meningitis surveillance and control strategies in the region.