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Chagas disease

An evidence-led atlas of transmission, acute and chronic disease, stage-specific diagnosis, antiparasitic therapy, and lifelong follow-up.

Chagas disease · American trypanosomiasis

MONDO:0001444Public QA completeSource-bound · 4

Disease at a glance

Start with the essentials, then explore the patient and research views.

Public revision · 30ab37f0eec9

Disease class
Chagas disease is an infection caused by the protozoan parasite Trypanosoma cruzi.
Core mechanism
A major route of transmission is contact of infected triatomine-bug feces with a bite wound or mucosa.
Genes or cause
Transmission can also occur congenitally, through transfusion or transplantation, contaminated food, or laboratory exposure.
Typical features
The acute phase may be asymptomatic or mild, but fever and swelling can occur.
Variability
Some untreated chronic infections lead to cardiac or digestive complications years later.
Diagnosis
Acute infection can be diagnosed by microscopic detection of circulating parasites in blood.
Management
Diagnosis of chronic infection uses two or more serologic tests based on different antigens.
Treatment and research
Benznidazole and nifurtimox are antiparasitic medicines that target the causative parasite.
Reading evidence
Antiparasitic treatment is most effective early and may become less effective as infection duration increases.
Key caution
Treatment decisions are individualized by age, infection phase, pregnancy, hepatic or renal status, and adverse-effect risk.

For patients and families

A structured guide for understanding the disease and preparing for clinical conversations.

At a glance

Chagas disease is an infection caused by the protozoan parasite Trypanosoma cruzi.

The acute phase may be asymptomatic or mild, but fever and swelling can occur.

How the disease works

A major route of transmission is contact of infected triatomine-bug feces with a bite wound or mucosa.

Transmission can also occur congenitally, through transfusion or transplantation, contaminated food, or laboratory exposure.

Why experiences vary

Some untreated chronic infections lead to cardiac or digestive complications years later.

Diagnosis and management

Acute infection can be diagnosed by microscopic detection of circulating parasites in blood.

Treatment status

Diagnosis of chronic infection uses two or more serologic tests based on different antigens.

Benznidazole and nifurtimox are antiparasitic medicines that target the causative parasite.

Reading clinical trials

Long-term follow-up is important to monitor clinical status and organ complications after infection.

Topics for a clinical visit

Clinical discussion should distinguish exposure risk, infection phase, test method, organ assessment, and treatment benefits and risks.

Medical notice

This material is for disease education and is not a personal diagnosis or treatment instruction.

Evidence and sources

A trial registry status does not establish efficacy or regulatory approval.