ISBT TTI WP: HBV safety study group Molecular characterisation of - PowerPoint PPT Presentation

Oct 14, 2022 •275 likes •426 views

ISBT TTI WP: HBV safety study group Molecular characterisation of occult HBV infection of different genotypes in blood donors Origin of OBIs studied and HBV genotypes A2/ A1 A2 D B/C E F A1 A2, C Collaborators Europe South East Asia E

ISBT TTI WP: HBV safety study group Molecular characterisation of occult HBV infection of different genotypes in blood donors
Origin of OBIs studied and HBV genotypes A2/ A1 A2 D B/C E F A1 A2, C
Collaborators Europe South East Asia E Brojer, P Grabarczyk Warsaw, Poland Dr Y Ayob, Kuala Lumpur, Malaysia Drs P Iudicone and M Miceli, Rome, Italy Dr K Lin, Hong Kong Dr P Ghiazza, Turin, Italy Dr R O’Charoen, Bangkok, Thailand Dr M Schmidt, Frankfurt, Germany Dr D Teo, Singapore USA Dr S Sauleda, Barcelona, Spain Drs R Roig and Alvarez, Valencia, Spain Dr S Stramer, Gaitesburg, Virginia Dr S Levicnik-Stezinar, Ljubljana, Slovenia Dr M Nubling, Langen, Germany Associated Africa Dr Hadziakis, Athens Dr S Owusu-Ofori, Kumasi, Ghana Prof W Gerlich, Giessen, Germany Dr A Bird, Cape Town, South Africa Dr M Koppelman, Sanquin, Netherlands Dr R Crookes, Johannesburg, South Africa Dr JM Etchevaria, Madrid, Spain
Prevalence and type of HBsAg-/DNA+ in donations screened individually Country (%prev) Donations OBI frequency Anti-HBc (%) Poland 250,191 1:11,900 7 Rome 35,016 1:4,377 4-8 Turin 236,708 1: 13,150 4-8 Madrid 157,207 1:10,500 5 Barcelona 15,545 1:2,590 4 Pakistan (2.2) 966 1:193 17.3 Thailand (5.6) 5,083 1:726 60 Ghana (15) 1,300 1:62 85
Blood Centres contributing to the data presented Number of yield samples Total WP OBI Other* Poland (21 centres) 28 4 21 3 Spain (Barcelona, Valencia) 35 4 30 1 Italy, (Rome & Torino) 35 0 29 6 Germany (Frankfurt) 11 0 6 5 Hong Kong 2 0 2 0 Singapore 6 0 6 0 Thailand (Bangkok) 2 0 2 0 Malaysia (Kuala Lumpur) 6 0 0 6 Ghana (Kumasi) 23 0 23 0 South Africa (SANBTS, Cape Town) 34 0 34 0 Total 182 8 153 21 * HBsAg+ with alternative assays or 2d WP or unconfirmed OBI
Samples pending Hong Kong 14 USA 18 Slovenia 6 Paul Erlich Institute 1 Cape Town 7 Johanesburg/Durban 94 Malaysia 5 Total 145
Distribution of viral load in 168 cases of OBI 10000 4 (2.4%) 1000 13 (7.7) 100 83 (49.4) 10 38 (22.6) 1 30 (17.9) 0.1 Viral load
Distribution of HBV genotypes based on Pre-S-S sequences Origin Genotype A1 A2 B C D E F Poland 4 10 Spain 4 10 1 Italy 13 Germany 1 1 Far East 2 3 Ghana 16 South Africa 10 3 Total 10 9 2 3 37 16 1
Distribution of HBV genotypes among Polish blood donors Type of infection Genotype N (%) A2 D HBsAg+/DNA+ 114 (79.2) 30 (20.8) HBsAg-/DNA+ 6 (37.5) 10 (62.5) P = 0.001

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