Opisthorchis noverca, a parasite of canine hosts and man, has been recovered from pigs on several occasions. One cow, of a total of 1012 slaughtered cattle, examined in Shillong, India, was found infected with this fluke along with a heavy infection of Fasciola gigantica. A comparative SEM study on the surface topography of the flukes originating from pigs and cattle revealed differences in the shape of the tegumental spines. Opisthorchis infection hitherto has not been reported from bovine hosts.