Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic
Previous studies in the Central African Republic (CAR) have reported the presence of hepatitis B virus (HBV) recombinant genotype E/D and a suspicion of immune escape mutants (IEMs), without further investigation into their impact on prevention and diagnosis. Consequently, this study investigated HB...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Elsevier
2020
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| Online Access: | https://hdl.handle.net/10568/109046 |
| _version_ | 1855526420772552704 |
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| author | Koyaweda, G.W. Ongus, J.R. Machuka, Eunice M. Juma, John Macharia, R. Komas, N.P. Pelle, Roger |
| author_browse | Juma, John Komas, N.P. Koyaweda, G.W. Macharia, R. Machuka, Eunice M. Ongus, J.R. Pelle, Roger |
| author_facet | Koyaweda, G.W. Ongus, J.R. Machuka, Eunice M. Juma, John Macharia, R. Komas, N.P. Pelle, Roger |
| author_sort | Koyaweda, G.W. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Previous studies in the Central African Republic (CAR) have reported the presence of hepatitis B virus (HBV) recombinant genotype E/D and a suspicion of immune escape mutants (IEMs), without further investigation into their impact on prevention and diagnosis. Consequently, this study investigated HBV mutations among hepatitis B surface antigen (HBsAg)-positive patients attending Institut Pasteur de Bangui in the CAR.Sera from a total of 118 HBsAg-positive patients with no previous history of HBV treatment or vaccination at the Institut Pasteur de Bangui, were sampled between 2017 and 2019. Subsequently, the region spanning the surface and polymerase genes of HBV was amplified by PCR and sequenced. HBV sequences were genotyped/subgenotyped by phylogenetic analysis and serotyped based on predicted amino acid residues at positions s122, s127, s140, s159, and s160. They were then analyzed for HBV IEMs and polymerase mutations.The region spanning the surface and polymerase genes was successfully amplified and sequenced for 51 samples. Of the HBV sequences, 49 were genotype E and two were genotype A subgenotype A1; these were serotyped as ayw4 and ayw1, respectively. Potential IEMs sY100C, sA128V, and sM133T, and several polymerase mutants were identified.This study raises awareness of the need for further studies to be conducted on a large scale to better understand HBV mutations for improved disease control and prevention strategies in the country. |
| format | Journal Article |
| id | CGSpace109046 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1090462025-12-02T10:59:51Z Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic Koyaweda, G.W. Ongus, J.R. Machuka, Eunice M. Juma, John Macharia, R. Komas, N.P. Pelle, Roger hepatitis health disease control Previous studies in the Central African Republic (CAR) have reported the presence of hepatitis B virus (HBV) recombinant genotype E/D and a suspicion of immune escape mutants (IEMs), without further investigation into their impact on prevention and diagnosis. Consequently, this study investigated HBV mutations among hepatitis B surface antigen (HBsAg)-positive patients attending Institut Pasteur de Bangui in the CAR.Sera from a total of 118 HBsAg-positive patients with no previous history of HBV treatment or vaccination at the Institut Pasteur de Bangui, were sampled between 2017 and 2019. Subsequently, the region spanning the surface and polymerase genes of HBV was amplified by PCR and sequenced. HBV sequences were genotyped/subgenotyped by phylogenetic analysis and serotyped based on predicted amino acid residues at positions s122, s127, s140, s159, and s160. They were then analyzed for HBV IEMs and polymerase mutations.The region spanning the surface and polymerase genes was successfully amplified and sequenced for 51 samples. Of the HBV sequences, 49 were genotype E and two were genotype A subgenotype A1; these were serotyped as ayw4 and ayw1, respectively. Potential IEMs sY100C, sA128V, and sM133T, and several polymerase mutants were identified.This study raises awareness of the need for further studies to be conducted on a large scale to better understand HBV mutations for improved disease control and prevention strategies in the country. 2020-01 2020-08-20T19:11:58Z 2020-08-20T19:11:58Z Journal Article https://hdl.handle.net/10568/109046 en Open Access Elsevier Koyaweda, G.W., Ongus, J.R., Machuka, E., Juma, J., Macharia, R., Komas, N.P. and Pelle, R. 2020. Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic. International Journal of Infectious Diseases 90:138-144. |
| spellingShingle | hepatitis health disease control Koyaweda, G.W. Ongus, J.R. Machuka, Eunice M. Juma, John Macharia, R. Komas, N.P. Pelle, Roger Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic |
| title | Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic |
| title_full | Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic |
| title_fullStr | Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic |
| title_full_unstemmed | Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic |
| title_short | Detection of circulating hepatitis B virus immune escape and polymerase mutants among HBV-positive patients attending Institut Pasteur de Bangui, Central African Republic |
| title_sort | detection of circulating hepatitis b virus immune escape and polymerase mutants among hbv positive patients attending institut pasteur de bangui central african republic |
| topic | hepatitis health disease control |
| url | https://hdl.handle.net/10568/109046 |
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