OTTAWA -- A Quebec company has expanded the recall of its Antimicrobial Foaming Hand Soap to include 19 additional lots of the product, Health Canada said Thursday.

On Monday, Avmor Ltd., recalled one lot of the product because it was found to be contaminated with bacteria.

Health Canada said testing showed the soap contains the bacterium Pseudomonas aeruginosa, which can pose a serious health risk, particularly to people with weakened immune systems.

Avmor, which makes professional cleaning products for use in offices and hospitals, is also recalling 21 lots of X3 Clean Alcohol-Free Foaming Hand Sanitizer as a precautionary measure, Health Canada said.

Consumers should stop using the recalled products and are advised to speak to their health-care practitioner if they have any concerns about their health.

People with compromised immune systems, including those with cystic fibrosis, HIV-AIDS, cancer, burns, diabetes or severe lung disease, are most at risks of adverse health effects from exposure to bacteria that may have contaminated the product.

No adverse reactions involving use of the foaming hand soap have been reported to Health Canada, and Avmor also confirmed it has received no such reports.

The product's drug identification number (DIN) is 02319144. Recalled lot numbers of the soap in one-litre plastic containers are: F121392032; F122353169; F121722415; F121231911; F120901362; F120330626; F120200498; F120160346; F113539955; F113009259; F112778570; F111586878; F111386429; F110885459; F110254442; F103493933; F103053192

Lot numbers for four-litre refills are: F112788571; F111336183; F110354443