When a person infected with the parasite urinates or defecates into the water of a pond, a lake, a stream, or a river, he releases parasite eggs — possibly up to a million eggs a day.
ये अंडे इतने छोटे होते हैं कि सूक्ष्मदर्शी की सहायता के बिना नहीं देखे जा सकते ।