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Description
Keith Weller image of microbiologist Thomas Stabel and technician Ruth Willson check immune cell populations from stressed and nonstressed Salmonella-infected pigs with the aid of a flow cytometer.

Keywords
agriculture, ars, caucasian, caucasians, computer, computers, department of agriculture, flow cytometer, immune cell populations, microbiologist, microbiologists, multi gender, research, ruth willson, salmonella, technician, thomas stabel, two people, us department of agriculture, usda, agricultural research,  free photography,  free photo,  free photos,  free picture,  free pictures,  free image,  free images

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