Abaxis, Inc. ( ABAX ), a manufacturer of point-of-care blood analysis systems for medical and veterinary markets, recently expanded its rapid diagnostics product line with the inclusion of a feline heartworm rapid test. Also, the United States Department of Agriculture (USDA) approved the company's VetScan Canine Heartworm Antigen Test for use in feline applications. Abaxis is expected to ship the new product in January 2012.