Trichomoniasis

Disease Description (Causes and Symptoms)

• Cause: Caused by infection with the flagellate protozoan Trypanosoma cruzi (the Chagas parasite), with the main vector being triatomine bugs of the Reduviidae family (kissing bugs). It can also be transmitted through blood transfusion, organ transplantation, congenitally (through the placenta), and ingestion of contaminated food.
• Pathophysiology: During the acute phase, local inflammation develops in the blood and tissues due to parasite activity. The disease then transitions to the chronic phase, during which chronic inflammation and fibrosis mainly progress in the myocardium, causing cardiomyopathy and conduction abnormalities (arrhythmias). Involvement of the gastrointestinal autonomic ganglia can cause megaesophagus and megacolon.
• Main symptoms:
  • Acute phase: Usually asymptomatic or associated with low-grade fever, localized lymph node enlargement, and localized swelling at the site of the bite (periorbital swelling, Romaña sign, etc.). Only a minority of cases have clearly apparent symptoms.
  • Chronic phase: Cardiac symptoms (arrhythmias, heart failure, cardiomegaly and cardiomyopathy), gastrointestinal symptoms (difficulty swallowing, chronic constipation/constipation and intestinal dilation), etc. Some patients develop disease decades after infection.

Treatment Methods

• Antiparasitic treatment (causal treatment)
  • Standard medications: benznidazole, nifurtimox.
  • Dosage according to the provided information (for reference):
    • Nifurtimox: 8–10 mg/kg/day orally for adults, for 90–120 days (15–20 mg/kg/day for children).
    • Benznidazole: 5 mg/kg/day orally for 60 days.
  • Treatment is more effective during the acute phase and in congenital infection, while its effectiveness may be limited in adults in the chronic phase. Clinical and laboratory monitoring is necessary before and during treatment.
• Treatment of chronic complications
  • Cardiomyopathy: Management of arrhythmias (antiarrhythmic drugs), standard heart failure treatment for tachycardia and cardiomyopathy (ACE inhibitors/ARBs, beta-blockers, diuretics, etc.), insertion of a pacemaker or implantable cardioverter-defibrillator (ICD) when necessary, and consideration of heart transplantation in severe cases.
  • Gastrointestinal complications: Medical and surgical treatment for esophageal and colonic dysfunction (e.g., esophageal dilation, surgery, etc.).
• Lifestyle management and precautions
  • Monitor for adverse effects of antiparasitic drugs (rash, gastrointestinal disturbances, peripheral neuropathy, hematotoxicity, etc.). Blood cell counts and liver function tests before treatment and regular testing during treatment are recommended.
  • Because the risks and benefits of using antiparasitic drugs during pregnancy must be considered comprehensively, consultation with an obstetrician-gynecologist and an infectious disease specialist is necessary.
  • Patients with chronic heart disease need regular cardiac examinations (ECG, echocardiography, etc.).
• Risk of complications: Chronic cardiomyopathy, fatal arrhythmias, heart failure, thromboembolism, megaesophagus, megacolon, etc.

Outpatient Visit Checklist (Items to Bring and Example Questions)

• Items to bring
  • A list of currently taken medications (including prescription drugs, OTC drugs, and supplements)
  • Past medical history (especially heart disease, pregnancy, liver disease, and blood disorders) and surgical history
  • Copies or summaries of previous test results (ECG, echocardiography, blood test results, serum antibody tests/PCR results, etc.)
  • Travel and residence history (whether and when you visited endemic areas such as Latin America)
  • A symptom diary (recording the timing and frequency of fever, palpitations, fainting, shortness of breath, digestive symptoms, etc.)
• Key information to report to the doctor during the outpatient visit
  • When symptoms began and how they have progressed (whether there were acute symptoms, chronic fatigue, shortness of breath, swelling, etc.)
  • Family and pregnancy plans (important because of the possibility of congenital transmission)
  • Any recent history of blood transfusion or organ transplantation, or ingestion of contaminated food

General Example Questions to Ask the Doctor

• What are the expected side effects of this medication (benznidazole or nifurtimox), and how should they be managed?
• What is the short-term and long-term prognosis of this disease? What changes can be expected with treatment?
• Which tests will be used to monitor treatment effectiveness and side effects during treatment (test intervals and items)?
• If there is a risk of cardiac complications, which tests should I undergo and when?
• If I am pregnant or breastfeeding, how should infection testing and treatment be managed?

Examples of Disease-Specific Questions

• My current ECG (or Holter monitoring) shows signs of an arrhythmia. What is the risk of complications from this, and is additional treatment (medication or device implantation) necessary?
• I am planning a pregnancy. What are the recommendations for preventing congenital transmission and for testing and treatment during pregnancy?

(Medical decisions should be made in consultation with the treating healthcare professionals and tailored to the individual’s condition.)