The occurrence of pili associated with a plasmid of the W compatibility group.
D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000378:metabolism; D005111:Extrachromosomal Inheritance; D005407:Flagella / Q000382:microbiology* / Q000648:ultrastructure; D005796:Genes; D008854:Microscopy, Electron; D010957:Plasmids; D011550:Pseudomonas aeruginosa / Q000378:metabolism; D012486:Salmonella typhimurium / Q000378:metabolism