DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Color enhanced Transmission Electron Micrograph (TEM) of salivary gland of the tick species Rhipicephalus appendiculatus showing sporozoites of Theileria parva, the parasitic protozoan that causes East Coast fever in cattle. R. appendiculatus is the main vector for the disease. Magnification unknown.
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