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Infection with Trypanosoma cruzi during pregnancy in rats and a decrease in chronic myocardial lesions in their
H O Davila1, S S Revelli, H S Moreno
1Division Inmunologia, Facultad de Ciencias Medicas, Universidad Nacional de Rosario, Argentina.
The American Journal of Tropical Medicine and Hygiene
|April 1, 1994
Summary
Maternal infection with Trypanosoma cruzi (Chagas disease) in rats did not harm mothers but decreased offspring survival due to neonatal transmission. However, chronic myocarditis was less common in offspring born to infected mothers.
Area of Science:
- Parasitology
- Immunology
- Maternal-fetal transmission
Background:
- Trypanosoma cruzi infection, the causative agent of Chagas disease, poses risks to pregnant individuals and their offspring.
- Understanding the impact of maternal infection on the developing fetus and neonate is crucial for disease management.
Purpose of the Study:
- To investigate the influence of maternal Trypanosoma cruzi infection on the course of parasitic infection in offspring.
- To evaluate the effects of maternal infection on offspring survival, development, and susceptibility to chronic Chagas disease.
Main Methods:
- Two groups of female rats were used: one infected with T. cruzi during pregnancy, and a control group.
- Offspring were nursed, then separated into infected and uninfected groups for further study.
- Parameters assessed included maternal health, reproductive capacity, offspring survival, weight, and incidence of myocarditis.
Main Results:
- Maternal T. cruzi infection did not cause severe disease or affect reproductive capacity.
- Offspring survival coefficient decreased in the maternal infection group, likely due to neonatal transmission.
- Neonatally infected offspring from infected mothers showed reduced prevalence of chronic focal myocarditis compared to offspring from uninfected mothers.
Conclusions:
- Maternal T. cruzi infection can lead to neonatal transmission and reduced offspring survival.
- Despite acute infection susceptibility, maternal infection may offer some protection against chronic myocarditis in offspring.
- Further research is needed to elucidate the mechanisms behind this protective effect.
