Dr. Doaa H. Assar graduated from the Faculty of Veterinary Medicine, Tanta University, in 2000, earning a degree of the Bachelor of Veterinary Medical Sciences with a rank of very good. He served as a Demonstrator at the Faculty of Veterinary Medicine, Tanta University, from 2000 to 2005 and was an Assistant Lecturer at the Faculty of Veterinary Medicine, Tanta University, from 2000 to 2011. From 2008 to 2010, he was enrolled as a Research Student at the Faculty of Applied Biological Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan. Dr. Doaa H. Assar served as a Lecturer at the Faculty of Veterinary Medicine, Kafrelsheikh University, in 2011–2018. In 2016–2017, he returned as a Visiting Researcher to the Faculty of Applied Biological Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan. In 2018–2019, Dr. Doaa H. Assar served as an Associate Professor at the Faculty of Veterinary Medicine in Kafrelsheikh University.