The surface finish for Rockwell testing must be smooth and uniform to obtain an accurate measurement. If you recognize the fact that one Rockwell point is equal to 0.002 millimeter (0.000080 inch), it is easy to understand why certain aspects of the test are important. Rockwell results typically are reported to 0.1 Rockwell point (0.000040 in.).
Pinworm inhabits the colon and rectum, feeding on Escherichia coli (E. coli) bacteria in the stool. Late at night when children are asleep, the female pinworm, which measures about the length of a staple (0.5 inch or 13 millimeters), emerges from the anus and lays her eggs on the surrounding skin.
Another way to tell if your cat has come across a worm infestation is to monitor their feces. Certain types of worms will remain visible in the feces; other types may not be visible, but will cause bleeding in the stool. Consistent dark tarry stools or diarrhea may also be signs of worms in the intestines.