Skip to main content
Email Print Share

All Images


Press Release 06-141

"Killer" B Cells Provide New Link in the Evolution of Immunity

Immune cells play different roles in fish and mammals

Back to article | Note about images

The trout cell in the lower left is in the process of engulfing tiny latex beads (arrow).

In the adaptive immune system in mammals, B cells produce antibodies to fight infection. In the more-primitive innate immunity in fish, scientists found that B cells take part in a process known as phagocytosis, by which immune system cells ingest foreign particles and microbes. The round cell in the lower left is B-cell ike from a trout. It is in the process of engulfing three latex beads, each (arrow) about 1 micron in diameter.

Image for use only with news articles about the research.

Credit: J. Oriol Sunyer, School of Veterinary Medicine, University of Pennsylvania; image taken with the assistance of R. Meade, Biomedical Imaging Core Laboratory of the School of Medicine, University of Pennsylvania.


Download the high-resolution JPG version of the image. (39 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.