studies

More documents

Recommendations

Info

988A AASLD ABSTRACTS HEPATOLOGY, October, 2015 D. At baseline, serum levels of HBV DNA, HBsAg and HBV RNA did not differ in patients with and without subsequent HBeAg SC. On treatment, HBV DNA and HBsAg levels did not differ between patients with and without HBeAg SC (Table). However, HBeAg positive patients achieving HBeAg SC had rapid HBV RNA declines by week 12 with most below LLOD by week 24. In contrast, HBeAg positive patients without SC had significantly higher levels of HBV RNA at all time points tested during treatment (p
HEPATOLOGY, VOLUME 62, NUMBER 1 (SUPPL) AASLD ABSTRACTS 989A tive samples. Out of which 280 (48.4%) samples were found to be HBV DNA positive and genotyping was done for 228 samples. The frequency distribution of genotypes were genotype D=214 (93.8%), genotype C=12 ( 5.2%), Genotype I=2(0.8%). Genotype D (93.8%) was found to be predominant genotype followed by C (5.2%) in the North eastern states. Conclusion:- HBV prevalence rate in North eastern states was found to be 5.9%. Genotype D (93.8%) was found to be predominant genotype followed by C (5.2%) in the North eastern states. This analysis of population-based data provides evidence of the prevalence of HBV infection in North eastern states. This important finding adds to the existing data of HBV prevalence in India. These results are relevant to public health policy makers and highlight the importance of promoting hepatitis B vaccination programs in the endemic areas of high HBV prevalence. Disclosures: The following authors have nothing to disclose: Premashis Kar, Vijay Karra 1597 Performance of the new cobas ® HBV Assay on the cobas ® 6800 system in comparison to different TaqMan ® assays Benjamin Maasoumy 1 , Kevin Luk 2 , Birgit Bremer 1 , Patrick Lehmann 1 , Ed G. Marins 2 , Veronique Michel-Treil 3 , Ekaterina Gelman 3 , Merlin Njoya 2 , Jesse A. Canchola 2 , Christian O. Simon 4 , Heiner Wedemeyer 1 ; 1 Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany; 2 Roche Molecular Systems Inc., Roche Diagnostics, Pleasanton, CA; 3 Covance Central Laboratory Services SA, Geneva, Switzerland; 4 Roche Diagnostics International, Ltd, Rotkreuz, Switzerland Background: Management of patients with hepatitis B (HBV) critically relies on robust and sensitive HBV DNA assays. Various commercial HBV DNA assays that are based on amplifying and detecting HBV DNA have received CE Mark or FDA Approval. In 2014, the new cobas ® 6800/8800 systems were introduced and are now used in routine diagnostic practice. For this platform, a new HBV viral load test was developed. We here aimed to investigate the performance of this new HBV DNA assay in a routine diagnostic setting. Methods: We evaluated the performance of the new cobas ® HBV test on the cobas ® 6800 system in comparison to the version 2.0 of the COBAS ® AmpliPrep/ COBAS ® TaqMan ® HBV test with automated nucleic acid extraction (HBV TaqMan ® v2) and to the manual extraction COBAS ® TaqMan ® HBV test For Use With The High Pure System (HBV HPS). Up to 336 HBV WHO 3 rd International Standard dilutions as well as 285 clinical samples were tested each with all the three assays. Results: The lower limits of detection were 2.7 IU/ml, 9.6 IU/ml and 6.2 IU/ ml for cobas ® HBV, HBV TaqMan ® v2 and HBV HPS assays, respectively, based on up to 48 samples tested for each dilution (2000 IU/mL, 200 IU/mL, 60 IU/ml, 20 IU/mL, 10 IU/ mL, 5 IU/mL, and 2.5 IU/mL). Cobas ® HBV detected 48/48 samples with a nominal titer of 5 IU/mL and 40/48 samples with a titer of 2.5 IU/mL. The assay was highly reproducible and linear even in samples with very low viremia with an average log10 IU/mL difference between observed and nominal titers of 0.04 (respective values were 0.05 and 0.18 for the HBV TaqMan ® v2 and the HBV HPS assays). Parallel testing of clinical samples showed largely comparable values across different viral loads with minimally lower values revealed by cobas ® HBV compared to HBV TaqMan ® v2 (mean of paired difference -0.099 log10 IU/mL; 95% CI -0.132; -0.065), while no significant difference was observed compared to the HBV HPS (mean of paired difference -0.011 log10 IU/mL; 95% CI -0.044; +0.023). Classification of samples at critical treatment decision cut-offs showed an overall percentage of agreement between the cobas ® HBV and the HBV TaqMan ® v2 assays of 94.4% for both the 2000 IU/mL and 20000 IU/mL thresholds while the respective values were 95.4% and 97.3% for cobas ® HBV vs. HBV HPS. Conclusions: The new cobas ® HBV test demonstrated an improved sensitivity compared to current TaqMan ® HBV assays, however, the clinical meaning of very low HBV viremia detected with new assay needs to be determined. Quantitative HBV DNA values are highly comparable between the assays, which demonstrates that the cobas ® HBV test can be reliably used in clinical practice to guide treatment decisions. Disclosures: Benjamin Maasoumy - Advisory Committees or Review Panels: Abbott Molecular, Janssen-Cilaq; Grant/Research Support: Abbott Molecular; Speaking and Teaching: MSD, Roche Diagnostics, Roche Pharma, Janssen-Cilaq, Fujirebio, BMS Ed G. Marins - Employment: Roche Molecular Systems Merlin Njoya - Employment: Roche Jesse A. Canchola - Employment: Roche Molecular Diagnostics Inc. Christian O. Simon - Employment: Roche Diagnostics International Heiner Wedemeyer - Advisory Committees or Review Panels: Transgene, MSD, Roche, Gilead, Abbott, BMS, Falk, Abbvie, Novartis, GSK, Roche Diagnostics; Grant/Research Support: MSD, Novartis, Gilead, Roche, Abbott, Roche Diagnostics; Speaking and Teaching: BMS, MSD, Novartis, ITF, Abbvie, Gilead The following authors have nothing to disclose: Kevin Luk, Birgit Bremer, Patrick Lehmann, Veronique Michel-Treil, Ekaterina Gelman 1598 Seroprevalence and Clinical Features of Hepatitis D Virus (HDV) Infection in a North American Cohort Norah Terrault 1 , Marc G. Ghany 2 , Chaeryon Kang 3 , Stewart Cooper 4 , Adrian M. Di Bisceglie 5 , Michael W. Fried 6 , Steven H. Belle 3 , Jay H. Hoofnagle 2 ; 1 UCSF, San Francisco, CA; 2 NIH- NIDDK, Bethesda, MD; 3 University of Pittsburgh, Pittsburgh, PA; 4 California Pacific Medical Center, San Francisco, CA; 5 St. Louis University, St. Louis, MO; 6 University of North Carolina, Chapel Hill, NC Background Hepatitis D virus (HDV) infection is estimated to affect ~4-5% (15 million) of persons with chronic hepatitis B virus (HBV) worldwide. The burden and clinical characteristics of HDV infection in North America is unknown. Aim: To determine the prevalence and clinical features of HDV in a well-characterized cohort of adults in North America with chronic HBV. Methods: All HBsAg-positive adults in the HBRN cohort with serum samples at enrollment were tested for total anti-HDV using a commercially available assay (DiaSorin, Italy). Prevalence of HDV was examined with respect to demographic and clinical features at enrollment. Results: Of 1165 adults tested, 30 (2.6%) were anti-HDV positive and 4 (0.3%) equivocal. For analysis of clinical features, 14 with HCV (13 HDV-negative; one triple-infected HBV/HCV/HDV) were excluded. Prevalence of anti-HDV positivity was similar in men (2.3%) and women (2.7%) and among whites (3.2%), blacks (4.9%) and Asians (1.8%) (p=0.08). Prevalence of HDV did not differ significantly by age (median 42 vs. 50 yrs) or presumed route of infection. Prevalence differed by genotype (p=0.001) being highest in participants with genotypes D (10.7%) and E (8.0%) which was also reflected in the differing prevalence of HDV by region of birth (p
Page 2 and 3:
208A AASLD ABSTRACTS HEPATOLOGY, Oc
Page 4 and 5:
Page 6 and 7:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 294 and 295:
Page 296 and 297:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
Page 304 and 305:
Page 306 and 307:
Page 308 and 309:
Page 310 and 311:
Page 312 and 313:
Page 314 and 315:
Page 316 and 317:
Page 318 and 319:
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
Page 356 and 357:
Page 358 and 359:
Page 360 and 361:
Page 362 and 363:
Page 364 and 365:
Page 366 and 367:
Page 368 and 369:
Page 370 and 371:
Page 372 and 373:
Page 374 and 375:
Page 376 and 377:
Page 378 and 379:
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
Page 386 and 387:
Page 388 and 389:
Page 390 and 391:
Page 392 and 393:
Page 394 and 395:
Page 396 and 397:
Page 398 and 399:
Page 400 and 401:
Page 402 and 403:
Page 404 and 405:
Page 406 and 407:
Page 408 and 409:
Page 410 and 411:
Page 412 and 413:
Page 414 and 415:
Page 416 and 417:
Page 418 and 419:
Page 420 and 421:
Page 422 and 423:
Page 424 and 425:
Page 426 and 427:
Page 428 and 429:
Page 430 and 431:
Page 432 and 433:
Page 434 and 435:
Page 436 and 437:
Page 438 and 439:
Page 440 and 441:
Page 442 and 443:
Page 444 and 445:
Page 446 and 447:
Page 448 and 449:
Page 450 and 451:
Page 452 and 453:
Page 454 and 455:
Page 456 and 457:
Page 458 and 459:
Page 460 and 461:
Page 462 and 463:
Page 464 and 465:
Page 466 and 467:
Page 468 and 469:
Page 470 and 471:
Page 472 and 473:
Page 474 and 475:
Page 476 and 477:
Page 478 and 479:
Page 480 and 481:
Page 482 and 483:
Page 484 and 485:
Page 486 and 487:
Page 488 and 489:
Page 490 and 491:
Page 492 and 493:
Page 494 and 495:
Page 496 and 497:
Page 498 and 499:
Page 500 and 501:
Page 502 and 503:
Page 504 and 505:
Page 506 and 507:
Page 508 and 509:
Page 510 and 511:
Page 512 and 513:
Page 514 and 515:
Page 516 and 517:
Page 518 and 519:
Page 520 and 521:
Page 522 and 523:
Page 524 and 525:
Page 526 and 527:
Page 528 and 529:
Page 530 and 531:
Page 532 and 533:
Page 534 and 535:
Page 536 and 537:
Page 538 and 539:
Page 540 and 541:
Page 542 and 543:
Page 544 and 545:
Page 546 and 547:
Page 548 and 549:
Page 550 and 551:
Page 552 and 553:
Page 554 and 555:
Page 556 and 557:
Page 558 and 559:
Page 560 and 561:
Page 562 and 563:
Page 564 and 565:
Page 566 and 567:
Page 568 and 569:
Page 570 and 571:
Page 572 and 573:
Page 574 and 575:
Page 576 and 577:
Page 578 and 579:
Page 580 and 581:
Page 582 and 583:
Page 584 and 585:
Page 586 and 587:
Page 588 and 589:
Page 590 and 591:
Page 592 and 593:
Page 594 and 595:
Page 596 and 597:
Page 598 and 599:
Page 600 and 601:
Page 602 and 603:
Page 604 and 605:
Page 606 and 607:
Page 608 and 609:
Page 610 and 611:
Page 612 and 613:
Page 614 and 615:
Page 616 and 617:
Page 618 and 619:
Page 620 and 621:
Page 622 and 623:
Page 624 and 625:
Page 626 and 627:
Page 628 and 629:
Page 630 and 631:
Page 632 and 633:
Page 634 and 635:
Page 636 and 637:
Page 638 and 639:
Page 640 and 641:
Page 642 and 643:
Page 644 and 645:
Page 646 and 647:
Page 648 and 649:
Page 650 and 651:
Page 652 and 653:
Page 654 and 655:
Page 656 and 657:
Page 658 and 659:
Page 660 and 661:
Page 662 and 663:
Page 664 and 665:
Page 666 and 667:
Page 668 and 669:
Page 670 and 671:
Page 672 and 673:
Page 674 and 675:
Page 676 and 677:
Page 678 and 679:
Page 680 and 681:
Page 682 and 683:
Page 684 and 685:
Page 686 and 687:
Page 688 and 689:
Page 690 and 691:
Page 692 and 693:
Page 694 and 695:
Page 696 and 697:
Page 698 and 699:
Page 700 and 701:
Page 702 and 703:
Page 704 and 705:
Page 706 and 707:
Page 708 and 709:
Page 710 and 711:
Page 712 and 713:
Page 714 and 715:
Page 716 and 717:
Page 718 and 719:
Page 720 and 721:
Page 722 and 723:
Page 724 and 725:
Page 726 and 727:
Page 728 and 729:
Page 730 and 731:
Page 732 and 733: 938A AASLD ABSTRACTS HEPATOLOGY, Oc
Page 794 and 795: 1000A AASLD ABSTRACTS HEPATOLOGY, O
Page 832 and 833:
1038A AASLD ABSTRACTS HEPATOLOGY, O
Page 834 and 835:
Page 836 and 837:
Page 838 and 839:
Page 840 and 841:
Page 842 and 843:
Page 844 and 845:
Page 846 and 847:
Page 848 and 849:
Page 850 and 851:
Page 852 and 853:
Page 854 and 855:
Page 856 and 857:
Page 858 and 859:
Page 860 and 861:
Page 862 and 863:
Page 864 and 865:
Page 866 and 867:
Page 868 and 869:
Page 870 and 871:
Page 872 and 873:
Page 874 and 875:
Page 876 and 877:
Page 878 and 879:
Page 880 and 881:
Page 882 and 883:
Page 884 and 885:
Page 886 and 887:
Page 888 and 889:
Page 890 and 891:
Page 892 and 893:
Page 894 and 895:
Page 896 and 897:
Page 898 and 899:
Page 900 and 901:
Page 902 and 903:
Page 904 and 905:
Page 906 and 907:
Page 908 and 909:
Page 910 and 911:
Page 912 and 913:
Page 914 and 915:
Page 916 and 917:
Page 918 and 919:
Page 920 and 921:
Page 922 and 923:
Page 924 and 925:
Page 926 and 927:
Page 928 and 929:
Page 930 and 931:
Page 932 and 933:
Page 934 and 935:
Page 936 and 937:
Page 938 and 939:
Page 940 and 941:
Page 942 and 943:
Page 944 and 945:
Page 946 and 947:
Page 948 and 949:
Page 950 and 951:
Page 952 and 953:
Page 954 and 955:
Page 956 and 957:
Page 958 and 959:
Page 960 and 961:
Page 962 and 963:
Page 964 and 965:
Page 966 and 967:
Page 968 and 969:
Page 970 and 971:
Page 972 and 973:
Page 974 and 975:
Page 976 and 977:
Page 978 and 979:
Page 980 and 981:
Page 982 and 983:
Page 984 and 985:
Page 986 and 987:
Page 988 and 989:
Page 990 and 991:
Page 992 and 993:
Page 994 and 995:
Page 996 and 997:
Page 998 and 999:
Page 1000 and 1001:
Page 1002 and 1003:
Page 1004 and 1005:
Page 1006 and 1007:
Page 1008 and 1009:
Page 1010 and 1011:
Page 1012 and 1013:
Page 1014 and 1015:
Page 1016 and 1017:
Page 1018 and 1019:
Page 1020 and 1021:
Page 1022 and 1023:
Page 1024 and 1025:
Page 1026 and 1027:
Page 1028 and 1029:
Page 1030 and 1031:
Page 1032 and 1033:
Page 1034 and 1035:
Page 1036 and 1037:
Page 1038 and 1039:
Page 1040 and 1041:
Page 1042 and 1043:
Page 1044 and 1045:
Page 1046 and 1047:
Page 1048 and 1049:
Page 1050 and 1051:
Page 1052 and 1053:
Page 1054 and 1055:
Page 1056 and 1057:
Page 1058 and 1059:
Page 1060 and 1061:
Page 1062 and 1063:
Page 1064 and 1065:
Page 1066 and 1067:
Page 1068 and 1069:
Page 1070 and 1071:
Page 1072 and 1073:
Page 1074 and 1075:
Page 1076 and 1077:
Page 1078 and 1079:
Page 1080 and 1081:
Page 1082 and 1083:
Page 1084 and 1085:
Page 1086 and 1087:
Page 1088 and 1089:
Page 1090 and 1091:
Page 1092 and 1093:
Page 1094 and 1095:
Page 1096 and 1097:
Page 1098 and 1099:
Page 1100 and 1101:
Page 1102 and 1103:
Page 1104 and 1105:
Page 1106 and 1107:
1312A AUTHOR INDEX HEPATOLOGY, Octo
Page 1108 and 1109:
Page 1110 and 1111:
Page 1112 and 1113:
Page 1114 and 1115:
Page 1116 and 1117:
Page 1118 and 1119:
Page 1120 and 1121:
Page 1122 and 1123:
Page 1124 and 1125:
Page 1126 and 1127:
Page 1128 and 1129:
Page 1130 and 1131:
Page 1132 and 1133:
Page 1134 and 1135:
Page 1136 and 1137:
Page 1138 and 1139:
Page 1140 and 1141:
Page 1142 and 1143:
Page 1144 and 1145:
Page 1146 and 1147:
Page 1148 and 1149:
Page 1150 and 1151:
Page 1152 and 1153:
Page 1154 and 1155:
Page 1156 and 1157:
Page 1158 and 1159:
Page 1160 and 1161:
1366A CATEGORY INDEX HEPATOLOGY, Oc
Page 1162 and 1163:
Page 1164 and 1165:
Page 1166 and 1167:
Page 1168 and 1169:
Page 1170 and 1171:
Page 1172:
show all

studies

Create successful ePaper yourself

Delete template?

Save as template?