Files in this Data Supplement:

• Supplemental file 1 - Time-lapse video showing autoaggregation of wild-type X. fastidiosa cells grown in a microfluidic channel. (Movie S1).
  Zipped AVI file, 11.5MB.
• Supplemental file 2 - Time-lapse video showing aggregation of wild-type X. fastidiosa cells grown in a microfluidic channel (Movie S2).
  Zipped AVI file, 6.5.MB.
• Supplemental file 3 - Time-lapse video depicting a large cell aggregate being displaced downstream by medium flow and in the process disrupting smaller aggregates into dispersed cells that quickly reaggregated (Movie S3).
  Zipped AVI file, 7MB.
• Supplemental file 4 - Time-lapse video of a fimA type I pilus-defective X. fastidiosa mutant grown in a microfluidic channel (Movie S4).
  Zipped AVI file, 4MB.
• Supplemental file 5 - Time-lapse video of a pilB type IV pilus-defective X. fastidiosa mutant grown in a microfluidic channel (Movie S5).
  Zipped AVI file, 4MB.
• Supplemental file 6 - Time-lapse video of a double X. fastidiosa mutant, fimA pilO, defective for both type I and type IV pili grown in a microfluidic channel (Movie S6).
  Zipped AVI file, 3MB.