4 doctors weighed in:
Is giardiasis caused by a parasite?
4 doctors weighed in

Dr. James Ferguson
Pediatrics
2 doctors agree
In brief: Yes
The infective form (cyst) of the parasite is expelled in the waste of the carrier human or animal & makes it into water. It is microscopic and often present in wadeing pools, ponds, on diaper changing tables, etc.
A contaminated hand or drink may then carry it into the mouth where it begin its life cycle again, traveling to the intestines to live & reproduce.

In brief: Yes
The infective form (cyst) of the parasite is expelled in the waste of the carrier human or animal & makes it into water. It is microscopic and often present in wadeing pools, ponds, on diaper changing tables, etc.
A contaminated hand or drink may then carry it into the mouth where it begin its life cycle again, traveling to the intestines to live & reproduce.
Dr. James Ferguson
Dr. James Ferguson
Thank
Dr. Diane Minich
Family Medicine
In brief: Yes
Usually from contaminated water.

In brief: Yes
Usually from contaminated water.
Dr. Diane Minich
Dr. Diane Minich
Thank
Read more answers from doctors