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In Vitro Drug Screening Against All Life Cycle Stages of Trypanosoma cruzi Using Parasites Expressing β-galactosidase
Published on: November 5, 2021
Acute and congenital Chagas disease
Caryn Bern1, Diana L Martin, Robert H Gilman
1Parasitic Diseases Branch, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Advances in Parasitology
|August 9, 2011
Summary
A sensitive screening test for congenital Chagas disease in newborns is crucial. Current methods miss many infections, highlighting the need for improved diagnostic tools for early detection and intervention.
Area of Science:
- Infectious Diseases
- Parasitology
- Public Health
Background:
- Chagas disease, caused by Trypanosoma cruzi, presents an acute phase with mild symptoms in most, but severe outcomes in <1%.
- Congenital Trypanosoma cruzi infection affects 1-10% of infants, often asymptomatic, yet carries a significant lifetime risk of cardiac and gastrointestinal disease.
- Current screening protocols in Latin America, involving prenatal serology and cord blood microscopy, have low completion rates (<20%) and limitations in sensitivity.
Purpose of the Study:
- To highlight the limitations of current congenital Chagas disease screening methods.
- To emphasize the need for a sensitive, specific, and practical newborn screening test for Chagas disease.
- To advocate for the integration of Chagas disease into existing newborn screening programs.
Main Methods:
- Review of current diagnostic techniques for congenital Chagas disease, including microscopy, serology, and polymerase chain reaction (PCR).
- Analysis of the effectiveness and limitations of existing screening algorithms in Latin American control programs.
- Evaluation of the sensitivity and early detection capabilities of PCR compared to conventional methods.
Main Results:
- Polymerase chain reaction (PCR) demonstrates higher sensitivity and earlier detection of congenital infections than traditional methods.
- Existing screening programs show suboptimal adherence, with less than 20% of at-risk infants completing all recommended steps.
- A significant proportion of congenital Chagas disease cases may be missed by current screening strategies, leading to delayed diagnosis and potential long-term complications.
Conclusions:
- A critical need exists for a highly sensitive and specific screening test for newborns to effectively diagnose congenital Chagas disease.
- Improved diagnostic tools are essential for integrating Chagas disease into universal newborn screening initiatives.
- Early detection and intervention through effective newborn screening can mitigate the long-term health consequences of Chagas disease.
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