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Schistosoma mansoni eggs in urine
R C Ratard1, C N Ndamkou, L E Kouemeni
1Tulane University School of Public Health and Tropical Medicine, Department of Tropical Medicine, New Orleans, LA 70003.
The Journal of Tropical Medicine and Hygiene
|October 1, 1991
Summary
Schistosoma mansoni eggs usually appear in stools, but can be found in urine under specific conditions, especially when Schistosoma haematobium is highly prevalent. High S. mansoni infection intensity does not increase the likelihood of urinary egg detection.
Area of Science:
- Tropical Medicine
- Parasitology
- Epidemiology
Background:
- Schistosoma mansoni (S. mansoni) eggs are typically detected in stool samples.
- Urinary S. mansoni egg excretion is considered unusual.
- Factors influencing urinary S. mansoni localization remain understudied.
Purpose of the Study:
- To investigate the factors influencing S. mansoni egg localization in urine.
- To understand the epidemiological conditions under which urinary S. mansoni becomes prominent.
Main Methods:
- Data collected during a schistosomiasis survey in northern Cameroon.
- Longitudinal community-based survey in Douloumi.
- Analysis of S. mansoni and S. haematobium prevalence and intensity.
Main Results:
- Most individuals infected with S. mansoni excreted eggs in their stools.
- In areas with high S. haematobium and low S. mansoni prevalence, urinary S. mansoni localization was observed to be dominant.
- High intensity of S. mansoni infection did not correlate with a higher probability of urinary S. mansoni detection.
Conclusions:
- Urinary S. mansoni excretion can occur, particularly in specific epidemiological contexts.
- The phenomenon is not a simple 'spill over' from high-intensity infections.
- Further research is needed to elucidate the mechanisms behind urinary S. mansoni localization.