Deformed Wing Virus (IMAGE) University of Veterinary Medicine -- Vienna Caption The Varroa mite and the deformed wing virus are main factors responsible for alarming bee mortality. Credit Kerstin Seitz/Vetmeduni Vienna Usage Restrictions None License Licensed content 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.