Fungus-Infected Fly (image) University of California - Davis Caption A Drosophila fly was infected with a fungus. UC Davis experiments with flies raised on the Space Shuttle, on Earth and under high gravity in a centrifuge show that gravity affects the Toll receptor pathway responsible for fighting this infection. Toll receptors are also important for immunity in mammals including humans. Credit Deborah Kimbrell/UC Davis Usage Restrictions May be used with acknowledgement of the source. 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.