Arieh Zaritsky is a bacterial physiologist, professor emeritus at Ben-Gurion University of the Negev, Israel. His research focuses on the coupling of chromosome replication and segregation with cell growth, division and dimensions. He discovered a tight coupling of cell Width to Nucleoid Complexity, and the still-elusive Inter-Initiations Eclipse, the mechanisms of both are challenges for the near future. During the last decade of the 20th century, he was involved in environmental studies, biologically controlling mosquitos and other insect pests by Bacillus thuringiensis.