SEM image of brown dog tick (IMAGE) Experimental Biology Caption Scanning electron microscopy image of the mouth parts of a brown dog tick. Credit John VandenBrooks, Midwestern University Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.