Trichomonas vaginalis is a direct cytopathogen, meaning it causes damage directly to host cells. Its pathogenesis involves multiple mechanisms: 1) Contact-dependent lysis: The parasite adheres to vaginal/urethral epithelial cells via surface proteins, leading to direct mechanical damage and cell death. 2) Phagocytosis: It can ingest host epithelial cells and red blood cells. 3) Cytotoxic factors: It releases enzymes like cysteine proteases and phospholipase A that degrade cell membranes and extracellular matrix. 4) Inflammatory response: The damage and parasite products provoke a robust inflammatory response, leading to the characteristic symptoms of itching, discharge, and inflammation. It does not produce classic exotoxins (A), nor does it typically invade deep tissues (C). While it can alter vaginal flora (D), that is a consequence, not the primary mechanism of pathogenesis.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• loveness Phiri – 1084 pts

• Visual Pathway Lesions
• Positive and Negative Symptoms
• Hallucinations and Delusions
• Antipsychotic Medications
• Emergency: Environmental Emergencies