Scientists Sequence Genome of Intestinal Parasite that Afflicts Hikers and Kids in Daycare – September 27, 2007

Giardia lamblia is a strange-looking parasite that swims in the
gut, spreads through stool, persists in contaminated water, and
is responsible for more than 20,000 reported infections a year
in the United States. Now it has finally spilled its genetic secrets.