Bacteria produce chemicals that extend the life-span of bubbles they inhabit meaning more microbes are spread when it bursts
Floating up to the surface of seas, volcanoes, soup and hot chocolate - is there a more joyful sight than a popping bubble? Yet some are filled with bacteria like Escherichia coli (E.coli) and a pop launches microbes in all directions, potentially spreading infection. Zooming in on bubbles with a high-powered microscope reveals the bacteria-laden lower bubble has tell-tale bright spots. Each is a plucky microbe, climbing up the dome-like 'cap' as it readies to explode. Researchers found that E.coli produce surfactant chemicals that thin the surface of the bubble, extending its life from seconds to minutes as the bacterial payload gathers – ensuring that when it does burst, the microorganisms spread far and wide. These may be important insights for scientists trying to contain the spread of infection or learning more about airborne disease transmission.
Written by John Ankers
BPoD stands for Biomedical Picture of the Day. Managed by the MRC London Institute of Medical Sciences the website aims to engage everyone, young and old, in the wonders of biomedicine. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.
BPoD is also available in Catalan at www.bpod.cat with translations by the University of Valencia.