Cat Dander
                Cat dander tends to be more elongated than human skin
                  flakes but not so much as dog dander.
                  The particles are more like angular ellipsoids, elongated parallelograms, or
                  elongated pentagrams.
              
              
                Transmitted Phase Contrast Illumination
                
Definition/Function:
                Significance in the Environment:
                Cat dander is common in homes with a pet cat but is also common in office and school
                environments from the clothing of cat owners.
                Characteristic Features:
                Cat dander tends to be more elongated than human skin flakes but not so much as dog
                dander.
                The particles are more like angular ellipsoids, elongated parallelograms, or elongated
                pentagrams.
                Associated Particles:
                References: