Negative Qualitative Serologic Test for Infectious Mononucleosis

Photograph of a negative qualitative test for infectious mononucleosis showing no clumping of the horse erythrocytes.

No clumping of the horse erythrocytes containing Paul-Bunnel antigens in their cell membrane indicates the person's serum does not contains heterophile antibodies. The few clumps that are seen are red blood cells from the test reagent that did not separate during shaking of the reagent prior to placing it on the slide.
Creative Commons License
Microbiology Laboratory Manual by Gary E. Kaiser, PhD, Professor of Microbiology
is licensed under a Creative Commons Attribution 4.0 International License.
Last updated: September, 2017