Midwife Toad (image) Helmholtz Centre for Environmental Research - UFZ Caption The midwife toad (Alytes obstetricans) in the Pyrenees. Some populations of this species did resist Bd infection and the pattern of the resistances was a first indication for the researchers that interactions between Bd zoospores and microorganisms are worth investigating more deeply. Credit Dirk S. Schmeller/UFZ Usage Restrictions With credit. 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.