True. A substantial percentage of individuals infected with Giardia lamblia—estimated to be as high as 50% or more—never develop any symptoms. They become asymptomatic cyst passers or carriers. The factors determining whether an infection becomes symptomatic are not fully understood but likely involve a combination of parasite factors (e.g., the specific assemblage or strain), host factors (e.g., age, nutritional status, immune response, prior exposure), and possibly the infectious dose. Asymptomatic carriers are crucial from a public health perspective because they can unknowingly shed cysts into the environment for weeks or months, serving as reservoirs for ongoing transmission.

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

Zambia

• Joseph Soko – 101 pts

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