The U.S. Food and Drug Administration (FDA) is warning parents about apple-flavored Baby's Bliss Gripe Water, a liquid herbal supplement marketed as a remedy for colic and teething pain, after several bottles tested positive for a parasite that can cause diarrhea and intestinal infection.

The FDA says the product has Cryptosporidium, a parasite that is believed to have sickened a 6-week-old infant in Minnesota. It is sold in four-ounce bottles and has an expiration date of Oct. 2008.

According to the Santa Cruz County Health Services Agency, the supplement's distributor, MOM Enterprises of San Rafael, California has recalled about 17,600 bottles of the product with a code of 26952V.

The bottles being recalled were sold through the Internet between November 2006 and September 2007 at retail stores nationwide.

The most common symptom of Cryptosporidium infection is watery diarrhea. Other symptoms include dehydration, weight loss, stomach cramps or pain, fever, nausea and vomiting.

Symptoms generally begin two to 10 days after becoming infected and usually last no more than two weeks. The infection could be serious or life-threatening for infants and children, who are susceptible to dehydration resulting from the diarrhea, according tot health officials.