Spaceflight increases biofilm formation by <i>P. aeruginosa</i>.

<p>Wild-type <i>P. aeruginosa</i> was cultured under normal gravity (black bars) and spaceflight (grey bars) conditions in mAUM or mAUMg containing 5 or 50 mM phosphate. (<b>A</b>) The number of surface-associated viable cells per cellulose ester membrane. (<b>B</b>) Biofilm biomass and (<b>C</b>) mean biofilm thickness were quantified by analysis of CLSM images. Error bars, SD; N = 3. *<i>p≤0.05</i>, **<i>p</i>≤<i>0.01</i>.