María Gloria Domínguez-Bello (born December 3, 1959)[1] is a Venezuelan-American microbial ecologist that has worked on adaptations of gut fermentation organs in animals, gastric colonization by bacteria, assembly of the microbiota in early life, effect of practices that reduce microbiota transmission and colonization in humans, and effect of urbanization.

Her lab at collaborates in multidisciplinary science, integrating microbiology, immunology, pediatrics, nutrition, anthropology, environmental engineering and architecture/urban studies, and microbial ecology.

"[3] She held two postdoctoral training positions, the first at INRA-Theix in France and the second at Centro de Biología Molecular Severo Ochoa at the Universidad Autonoma of Madrid, Spain.

Domínguez-Bello first proposed the idea of restoring the microbiota in C-section born neonates -void of the natural maternal birth canal microbes.

In 2015 she received the Arturo L. Carrión Muñoz|Arturo Carrion Award from the Puerto Rico Society of Microbiology and became member of the Academy of Sciences of Latin America (ACAL).