David and Goliath

Título: David and Goliath

Autor: Víctor Jiménez Cid

Dpto. Microbiología II, Facultad de Farmacia. Universidad Complutense de Madrid. 28040-Madrid, Spain

Descripción: The spread of a large bacterial colony is arrested by a smaller colony, displaying and antibiotic effect similar to the one that led Alexander Fleming to the discovery of penicillin. Macrophotography of bacterial colonies on TSA 10% agar from a randomly spread soil sample taken at an urban park. The picture was shot after one week of incubation at room temperature.