WASHINGTON -- The maker of Listerine is recalling one of its rinses after tests showed it was contaminated with microorganisms.

A Johnson & Johnson spokeswoman said a company unit is recalling 4 million bottles of the recently launched Listerine Agent Cool Blue plaque-detecting rinse, marketed primarily for use by children.

The recall affects the Glacier Mint and Bubble Blast flavors.

The company said tests showed contamination, despite the use of preservatives. However, the company said there have be no reports of health problems from the contamination.

The affected rinses have been sold in supermarkets, drug stores, mass merchants and other retail outlets, and it's sold to dental professionals' offices nationwide. Johnson & Johnson is contacting dental professionals and retailers directly as part of their recall notification process.

Consumers are advised to stop using the product and throw it away. Consumers can get full refund by calling the company at 1-888-222-0249 and mailing in the back label, including the UPC code.

• More Details: Recall Q&A