Darrell Jay Grimes, Ph.D.

Darrell Jay Grimes, Ph.D.

Professor Emeritus (retired) – Department of Coastal Sciences, Marine Microbial Ecology

Member – GCRL Marine Microbiology Group

Cell: 228.806.7700
Home: 228.497.2953


Marine Microbiology

Research in my Marine Microbial Ecology laboratory was focused on the Vibrios, before I retired at the end of December 2017. The genus Vibrio now includes over 139 species (http://www.bacterio.net/vibrio.html) and it is believed to comprise the dominant culturable bacterial taxon in the ocean. Much of my research has been focused on V. parahaemolyticus and V. vulnificus, although we have recently looked at the abundance and distribution of V. cholerae along the Northern Gulf of Mexico coastline. We have been especially interested in the ecology of these indigenous marine bacteria and the factors that allow them to survive in the environment and to cause disease in humans and other animals, especially fish. Current research covers viable but nonculturable Vibrios; V. vulnificus and necrotizing fasciitis; naturally occurring Vibrios and other bacteria in elasmobranch fishes; and understanding the role of Vibrios in biodegradation of wastes, including petroleum, in the ocean. Most recently, we have begun looking at antibiotic resistance in marine bacteria. We are sampling eastern shore waters of the Pascagoula River and we are finding antibiotic resistant Vibrios. Finally, because the GCRL has a large research and development program in marine fish aquaculture, we have worked with the GCRL marine aquaculture team to study and find cures for bacterial diseases, especially vibriosis.