Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018
Abstract Background A group of Victoria lineage influenza B viruses with a two amino acid deletion in the hemagglutinin (HA) at residues K162 and N163, was detected during the 2016 to 2017 Northern Hemisphere influenza season and continues to spread geographically. We describe the first identificati...
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Wiley
2021-09-01
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Series: | Health Science Reports |
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Online Access: | https://doi.org/10.1002/hsr2.367 |
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record_format |
Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Orienka Hellferscee Florette Treurnicht Lucinda Gaelejwe Alexandra Moerdyk Gary Reubenson Meredith McMorrow Stefano Tempia Johanna McAnerney Sibongile Walaza Nicole Wolter Anne vonGottberg Cheryl Cohen |
spellingShingle |
Orienka Hellferscee Florette Treurnicht Lucinda Gaelejwe Alexandra Moerdyk Gary Reubenson Meredith McMorrow Stefano Tempia Johanna McAnerney Sibongile Walaza Nicole Wolter Anne vonGottberg Cheryl Cohen Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018 Health Science Reports deletions influenza B South Africa Victoria lineage |
author_facet |
Orienka Hellferscee Florette Treurnicht Lucinda Gaelejwe Alexandra Moerdyk Gary Reubenson Meredith McMorrow Stefano Tempia Johanna McAnerney Sibongile Walaza Nicole Wolter Anne vonGottberg Cheryl Cohen |
author_sort |
Orienka Hellferscee |
title |
Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018 |
title_short |
Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018 |
title_full |
Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018 |
title_fullStr |
Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018 |
title_full_unstemmed |
Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018 |
title_sort |
detection of victoria lineage influenza b viruses with k162 and n163 deletions in the hemagglutinin gene, south africa, 2018 |
publisher |
Wiley |
series |
Health Science Reports |
issn |
2398-8835 |
publishDate |
2021-09-01 |
description |
Abstract Background A group of Victoria lineage influenza B viruses with a two amino acid deletion in the hemagglutinin (HA) at residues K162 and N163, was detected during the 2016 to 2017 Northern Hemisphere influenza season and continues to spread geographically. We describe the first identification of viruses with these deletions from South Africa in 2018. Methods Nasopharyngeal samples were obtained from the syndromic surveillance programs. Real‐time reverse transcription‐polymerase chain reaction was used for virus detection and lineage determination. Influenza genetic characterization was done using next‐generation sequencing on the MiSeq platform. The duration of virus circulation was determined using thresholds calculated using the Moving Epidemic Method; duration was used as an indicator of disease transmissibility and impact. Results In 2018, 42% (426/1015) of influenza‐positive specimens were influenza B viruses. Of 426 influenza B‐positive samples, 376 (88%) had the lineage determined of which 75% (283/376) were Victoria lineage. The transmissibility of the 2018 South African influenza season was high for a few weeks, although the severity remained moderate through most of the season. The sequenced 2018 South African Victoria lineage influenza B viruses clustered in sub‐clade V1A.1 with the 162‐163 deletions. Conclusions We report the first detection of the 162‐163 deletion variant of influenza B/Victoria viruses from South Africa in 2018, and suggest that this deletion variant replaced the previous circulating influenza B/Victoria viruses. These deletions putatively affect the antigenic properties of the viruses because they border an immune‐dominant region at the tip of the HA. Therefore, close monitoring of these newly emerging viruses is essential. |
topic |
deletions influenza B South Africa Victoria lineage |
url |
https://doi.org/10.1002/hsr2.367 |
work_keys_str_mv |
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doaj-b7d95bfacd6541ceb8c44fbac3d460dc2021-09-29T06:32:36ZengWileyHealth Science Reports2398-88352021-09-0143n/an/a10.1002/hsr2.367Detection of Victoria lineage influenza B viruses with K162 and N163 deletions in the hemagglutinin gene, South Africa, 2018Orienka Hellferscee0Florette Treurnicht1Lucinda Gaelejwe2Alexandra Moerdyk3Gary Reubenson4Meredith McMorrow5Stefano Tempia6Johanna McAnerney7Sibongile Walaza8Nicole Wolter9Anne vonGottberg10Cheryl Cohen11Centre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaDepartment of Medical Virology, School of Pathology, Faculty of Health Sciences University of the Witwatersrand Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaDepartment of Paediatrics & Child Health, Faculty of Health Sciences University of the Witwatersrand Johannesburg South AfricaInfluenza Division Centers for Disease Control and Prevention Atlanta Georgia USACentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaCentre for Respiratory Diseases and Meningitis National Institute for Communicable Diseases of the National Health Laboratory Service Johannesburg South AfricaAbstract Background A group of Victoria lineage influenza B viruses with a two amino acid deletion in the hemagglutinin (HA) at residues K162 and N163, was detected during the 2016 to 2017 Northern Hemisphere influenza season and continues to spread geographically. We describe the first identification of viruses with these deletions from South Africa in 2018. Methods Nasopharyngeal samples were obtained from the syndromic surveillance programs. Real‐time reverse transcription‐polymerase chain reaction was used for virus detection and lineage determination. Influenza genetic characterization was done using next‐generation sequencing on the MiSeq platform. The duration of virus circulation was determined using thresholds calculated using the Moving Epidemic Method; duration was used as an indicator of disease transmissibility and impact. Results In 2018, 42% (426/1015) of influenza‐positive specimens were influenza B viruses. Of 426 influenza B‐positive samples, 376 (88%) had the lineage determined of which 75% (283/376) were Victoria lineage. The transmissibility of the 2018 South African influenza season was high for a few weeks, although the severity remained moderate through most of the season. The sequenced 2018 South African Victoria lineage influenza B viruses clustered in sub‐clade V1A.1 with the 162‐163 deletions. Conclusions We report the first detection of the 162‐163 deletion variant of influenza B/Victoria viruses from South Africa in 2018, and suggest that this deletion variant replaced the previous circulating influenza B/Victoria viruses. These deletions putatively affect the antigenic properties of the viruses because they border an immune‐dominant region at the tip of the HA. Therefore, close monitoring of these newly emerging viruses is essential.https://doi.org/10.1002/hsr2.367deletionsinfluenza BSouth AfricaVictoria lineage |