λcI857 lytic infections and host lysogenization following induction of lysogens embedded within Escherichia coli biofilms with either WT curli production (curli+) or no curli production (curli−). Host biofilms were inoculated with λcI857 lysogens and uninfected host cells at a 1:10 ratio and cultured for 72 h prior to λcI857 phage induction. The image shows a time series of biofilms inoculated with lysogens and uninfected E. coli hosts that either produce (top row) or do not produce (bottom row) curli extracellular matrix. The first image in each row was taken just after heat was applied to induce some biofilm-embedded lysogens to switch to the lytic infection cycle.
How do #bacteriophage life history strategies influence host invasion & inter- #phage competition in #biofilms? This study shows that spatial structure shapes invasion success, favoring temperate phages over lytic ones when diffusion is limited @plosbiology.org 🧪 plos.io/47Aripq