Autoaggregation of Xylella fastidiosa Cells Is Influenced by Type I and Type IV Pili

Abstract
Autoaggregation of widely dispersed Xylella fastidiosa cells into compact cell masses occurred over a period of hours following 7 to 11 days of growth in microfluidic chambers. Studies involving the use of mutants defective in polarly positioned type I ( fimA -negative), type IV ( pilB -negative), or both type I and IV ( fimA - and pilO -negative) pili revealed the importance and role of pili in the autoaggregation process.