Complaints of glass in jars of Gerber baby food appear to be isolated cases, and evidence does not justify a recall even though dozens of stores have pulled some jars from shelves, company and federal officials said yesterday.

One Food and Drug Administration official urged shoppers to use extra care in buying packaged food.

Customers in Maryland, Georgia and Florida this week and in New York last week said they found pieces of glass in jars of Gerber products, including juice, peas, and strained peaches, carrots and bananas.

"These are isolated cases," said Emil Corwin, an FDA spokesman. "On the basis of current information, there have been no recalls. We are looking and still investigating."

Maryland Health Department spokeswoman Lynn Doyle said a woman from Elkton and a woman from Middle River yesterday reported finding glass in two jars of Gerber strained peaches. Doyle said the lot numbers on the jars were not immediately available.

In Georgia, X-rays disclosed an unidentified object in the stomach of a 9-month-old Swainsboro girl who had eaten Gerber baby food, but she apparently suffered no harm, said Emanuel County Sheriff Tyson Stephens.

A deputy sent to the house found as many as 10 pieces of glass in two jars, and a neighbor found glass in another, he said. The jars were sent to an FDA lab in Atlanta for tests.

In Miami, Vicky Marton said her husband, Dennis, found glass Monday in juice he was about to serve their 5-month-old son.

Gerber is one of the world's largest makers of baby food, producing more than 1 billion jars a year. The company is working closely with federal officials and is obtaining samples for analysis in each case, a spokesman said.

"Pending these analyses, it is impossible to speculate on the validity of any complaint," said L. James Lovejoy, spokesman at Gerber Products Co. headquarters in Fremont, Mich. "Gerber has not received any reports involving injury to any child or adult," he said.