0 10 Nonopsonic nonopsonic JJ 11 23 phagocytosis phagocytosis NN 24 26 of of IN 27 38 Pseudomonas Pseudomonas NNP 39 49 aeruginosa aeruginosa NN 50 52 by by IN 53 64 macrophages macrophage NNS 65 68 and and CC 69 86 polymorphonuclear polymorphonuclear JJ 87 97 leukocytes leukocyte NNS 98 106 requires require VBZ 107 110 the the DT 111 119 presence presence NN 120 122 of of IN 123 126 the the DT 127 136 bacterial bacterial JJ 137 146 flagellum flagellum NN 146 147 . . . 149 156 Whereas whereas IN 157 160 the the DT 161 170 mechanism mechanism NN 171 173 of of IN 174 184 nonopsonic nonopsonic JJ 185 197 phagocytosis phagocytosis NN 198 200 of of IN 201 212 Pseudomonas Pseudomonas NNP 213 223 aeruginosa aeruginosa NN 224 227 has have VBZ 228 232 been be VBN 233 242 described describe VBN 242 243 , , , 244 247 the the DT 248 257 bacterial bacterial JJ 258 265 ligands ligand NNS 266 274 required require VBN 275 278 are be VBP 279 285 poorly poorly RB 286 296 understood understand VBN 296 297 . . . 298 300 To to TO 301 309 identify identify VB 310 313 the the DT 314 323 requisite requisite JJ 324 333 bacterial bacterial JJ 334 341 ligands ligand NNS 341 342 , , , 343 350 studies study NNS 351 355 with with IN 356 364 isogenic isogenic JJ 365 372 mutants mutant NNS 373 375 of of IN 376 378 P. P. NNP 379 389 aeruginosa aeruginosa NNP 390 393 PAK PAK NNP 394 401 lacking lack VBG 402 406 pili pili NNS 406 407 , , , 408 416 flagella flagella NN 416 417 , , , 418 421 and and CC 422 425 the the DT 426 430 RpoN RpoN NNP 431 436 sigma sigma NN 437 443 factor factor NN 444 448 were be VBD 449 459 undertaken undertake VBN 459 460 . . . 461 464 The the DT 465 469 RpoN rpon NN 470 476 mutant mutant NN 476 477 , , , 478 485 lacking lack VBG 486 490 pili pili NNS 490 491 , , , 492 500 flagella flagella NN 500 501 , , , 502 505 and and CC 506 514 nonpilus nonpilus JJ 515 523 adhesins adhesin NNS 523 524 , , , 525 530 bound bind VBD 531 537 poorly poorly RB 538 541 and and CC 542 545 was be VBD 546 555 resistant resistant JJ 556 558 to to TO 559 568 ingestion ingestion NN 569 571 by by IN 572 576 both both CC 577 588 macrophages macrophage NNS 589 592 and and CC 593 604 neutrophils neutrophil NNS 604 605 . . . 606 610 Pili Pili NNP 611 615 were be VBD 616 619 not not RB 620 630 absolutely absolutely RB 631 639 required require VBN 640 643 for for IN 644 651 binding binding NN 652 654 or or CC 655 667 phagocytosis phagocytosis NN 668 670 of of IN 671 673 P. P. NNP 674 684 aeruginosa aeruginosa NNP 684 685 . . . 686 689 The the DT 690 698 presence presence NN 699 701 of of IN 702 703 a a DT 704 713 flagellum flagellum NN 714 717 was be VBD 718 721 not not RB 722 730 required require VBN 731 734 for for IN 735 742 binding binding NN 743 745 of of IN 746 748 P. P. NNP 749 759 aeruginosa aeruginosa NNP 760 762 to to TO 763 774 macrophages macrophage NNS 775 778 but but CC 779 782 was be VBD 783 791 critical critical JJ 792 795 for for IN 796 799 the the DT 800 810 subsequent subsequent JJ 811 826 internalization internalization NN 827 829 of of IN 830 833 the the DT 834 843 bacterium bacterium NN 843 844 , , , 845 855 suggesting suggest VBG 856 860 that that IN 861 865 this this DT 866 872 factor factor NN 873 875 or or CC 876 877 a a DT 878 885 surface surface NN 886 892 ligand ligand NN 893 903 associated associate VBN 904 908 with with IN 909 912 its its PRP$ 913 921 assembly assembly NN 922 925 was be VBD 926 937 responsible responsible JJ 938 941 for for IN 942 953 stimulation stimulation NN 954 956 of of IN 957 967 nonopsonic nonopsonic JJ 968 980 phagocytosis phagocytosis NN 980 981 . . .