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PCR detection of Ehrlichia spp. infection in EDTA-blood samples from three representative dogs, obtained by using species-specific E. canis, E. chaffeensis, or E. ewingii primers. Controls include uninfected EDTA-dog blood and culture-grown E. canis, E. chaffeensis, and E. ewingii DNA from a naturally infected dog with numerous granulocytic inclusions. Numbers to the left of the gel are molecular sizes (in base pairs).
