Wild Mice Have Natural Protection against Lyme borreliosis (image) University of Zurich Share Print E-Mail Caption Ticks suck blood. Through the saliva of infected ticks, Borrelia get into the blood stream of mice. Credit Picture: UZH Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.