The Associated Press

TORONTO - New York Yankees slugger Jason Giambi will receive test results today that might explain why he has been feeling so weak for months.

Giambi, sidelined earlier this season because of an intestinal parasite, played down a report Monday that he was being checked for a parasite that can cause a potentially fatal condition.

"We're not in a third-world country, so we have medication," Giambi said.

Giambi's trainer, Bob Alejo, told the Newark Star-Ledger that the All-Star first baseman is being tested for a dangerous parasite called entamoeba histolytica.

Giambi expects to learn more about his status today, when he is scheduled to meet with Dr. Scott Hammer, an infectious disease specialist at Columbia-Presbyterian Medical Center in New York.

"I want to see what this guy says before we make any decisions," Giambi said Monday before the Yankees played Toronto. "All these tests have been run and he's going to look them over."

The 33-year-old Giambi missed four of New York's previous five games. He is hitting just .221 with 11 homers and 36 RBI. The 2000 AL MVP, who did not start in eight straight games from June 26 to July 4 because of the parasite, is in an 0-for-21 slump.

"When I was playing I was thinking I was just going to gut it out, but I'm obviously not going in that direction," Giambi said. "I feel a little bit better than when I first got diagnosed with it, but it's just not close to the level I want to be at and the team needs me to be at."

Teammate Kevin Brown has been sidelined since June 9 with a lower back spasm and an intestinal parasite, but could return Friday if a bullpen session goes well on Wednesday.

"We're just fighting to get back," Giambi said.

Tony Clark started at first base in place of Giambi again on Monday night.

New York manager Joe Torre said the team was just waiting to learn more about Giambi's condition.

"We still don't know anything more than we did two days ago," Torre said. "We'll be getting more of the tests back tomorrow and then we'll leave it to the medical people."