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DOES FEEDING TICKS ON IMMUNE ANIMALS INFLUENCE RICKETTSIA SIBIRICA,
NAVAL MEDICAL RESEARCH UNIT NO 3 CAIRO (EGYPT) DEPT OF MEDICAL ZOOLOGY
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It was shown experimentally that H. asiaticum ticks feeding on infected guineapigs pick up R. sibirica and can preserve them for two years. Ticks H. asiaticum infected with rickettsia do not get rid of R. sibirica by a single and complete engorgement on immune animals or by intermittent bloodsucking on an immune and then on a healthy animal. Infected H. asiaticum ticks sucking immune blood retain the capacity for transphasal and transovarial transmission of R. sibirica to their progeny. Author
APPROVED FOR PUBLIC RELEASE