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Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia

INTRODUCTION: Influenza circulation in tropics and subtropics reveals a complex seasonal pattern with year‐round circulation in some areas and biannual peaks in others. METHODS: We analyzed influenza surveillance data from nine countries around southern and southeastern Asia spanning latitudinal gra...

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Autores principales: Saha, Siddhartha, Chadha, Mandeep, Shu, Yuelong, Lijie, Wang, Chittaganpitch, Malinee, Waicharoen, Sunthareeya, Lindblade, Kim A., Phengta, Vongphrachanh, Phonekeo, Darouny, Corwin, Andrew, Touch, Sok, Buchy, Philippe, Lin, Raymond, Low, Constance, Kheong, Chong Chee, Yusof, Apandi bin, Tandoc, Amado, Roque, Vito, Arguelles, Vina, Dawood, Fatimah S., Moen, Ann, Widdowson, Marc‐Alain, Cox, Nancy J., Lal, Renu B
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4814861/
https://www.ncbi.nlm.nih.gov/pubmed/26781162
http://dx.doi.org/10.1111/irv.12372
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author Saha, Siddhartha
Chadha, Mandeep
Shu, Yuelong
Lijie, Wang
Chittaganpitch, Malinee
Waicharoen, Sunthareeya
Lindblade, Kim A.
Phengta, Vongphrachanh
Phonekeo, Darouny
Corwin, Andrew
Touch, Sok
Buchy, Philippe
Lin, Raymond
Low, Constance
Kheong, Chong Chee
Yusof, Apandi bin
Tandoc, Amado
Roque, Vito
Arguelles, Vina
Dawood, Fatimah S.
Moen, Ann
Widdowson, Marc‐Alain
Cox, Nancy J.
Lal, Renu B
author_facet Saha, Siddhartha
Chadha, Mandeep
Shu, Yuelong
Lijie, Wang
Chittaganpitch, Malinee
Waicharoen, Sunthareeya
Lindblade, Kim A.
Phengta, Vongphrachanh
Phonekeo, Darouny
Corwin, Andrew
Touch, Sok
Buchy, Philippe
Lin, Raymond
Low, Constance
Kheong, Chong Chee
Yusof, Apandi bin
Tandoc, Amado
Roque, Vito
Arguelles, Vina
Dawood, Fatimah S.
Moen, Ann
Widdowson, Marc‐Alain
Cox, Nancy J.
Lal, Renu B
author_sort Saha, Siddhartha
collection PubMed
description INTRODUCTION: Influenza circulation in tropics and subtropics reveals a complex seasonal pattern with year‐round circulation in some areas and biannual peaks in others. METHODS: We analyzed influenza surveillance data from nine countries around southern and southeastern Asia spanning latitudinal gradient from equatorial to temperate zones to further characterize influenza type‐specific seasonality in the region. We calculated proportion of positives by month out of positives during that year and adjust for variation in samples tested and positivity in these countries. RESULTS: Influenza A epidemics were identified between November and March during winters in areas lying above 30°N latitude, during monsoon months of June–November in areas between 10° and 30°N latitude, and no specific seasonality for influenza A virus circulation in areas lying closer to the equator. Influenza B circulation coincided with influenza A circulation in areas lying above 30°N latitude; however, in areas south of 30°N Asia, influenza B circulated year round at 3–8% of annual influenza B positives during most months with less pronounced peaks during post‐monsoon period. CONCLUSION: Even though influenza B circulates round the year in most areas of the tropical regions of southern and southeastern Asia, the most appropriate time for influenza vaccination using the most recent WHO recommended vaccine would be prior to the monsoon season conferring protection against influenza A and B peaks.
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spelling pubmed-48148612016-05-01 Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia Saha, Siddhartha Chadha, Mandeep Shu, Yuelong Lijie, Wang Chittaganpitch, Malinee Waicharoen, Sunthareeya Lindblade, Kim A. Phengta, Vongphrachanh Phonekeo, Darouny Corwin, Andrew Touch, Sok Buchy, Philippe Lin, Raymond Low, Constance Kheong, Chong Chee Yusof, Apandi bin Tandoc, Amado Roque, Vito Arguelles, Vina Dawood, Fatimah S. Moen, Ann Widdowson, Marc‐Alain Cox, Nancy J. Lal, Renu B Influenza Other Respir Viruses Short Article INTRODUCTION: Influenza circulation in tropics and subtropics reveals a complex seasonal pattern with year‐round circulation in some areas and biannual peaks in others. METHODS: We analyzed influenza surveillance data from nine countries around southern and southeastern Asia spanning latitudinal gradient from equatorial to temperate zones to further characterize influenza type‐specific seasonality in the region. We calculated proportion of positives by month out of positives during that year and adjust for variation in samples tested and positivity in these countries. RESULTS: Influenza A epidemics were identified between November and March during winters in areas lying above 30°N latitude, during monsoon months of June–November in areas between 10° and 30°N latitude, and no specific seasonality for influenza A virus circulation in areas lying closer to the equator. Influenza B circulation coincided with influenza A circulation in areas lying above 30°N latitude; however, in areas south of 30°N Asia, influenza B circulated year round at 3–8% of annual influenza B positives during most months with less pronounced peaks during post‐monsoon period. CONCLUSION: Even though influenza B circulates round the year in most areas of the tropical regions of southern and southeastern Asia, the most appropriate time for influenza vaccination using the most recent WHO recommended vaccine would be prior to the monsoon season conferring protection against influenza A and B peaks. John Wiley and Sons Inc. 2016-02-05 2016-05 /pmc/articles/PMC4814861/ /pubmed/26781162 http://dx.doi.org/10.1111/irv.12372 Text en © 2016 The Authors. Influenza and Other Respiratory Viruses Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Short Article
Saha, Siddhartha
Chadha, Mandeep
Shu, Yuelong
Lijie, Wang
Chittaganpitch, Malinee
Waicharoen, Sunthareeya
Lindblade, Kim A.
Phengta, Vongphrachanh
Phonekeo, Darouny
Corwin, Andrew
Touch, Sok
Buchy, Philippe
Lin, Raymond
Low, Constance
Kheong, Chong Chee
Yusof, Apandi bin
Tandoc, Amado
Roque, Vito
Arguelles, Vina
Dawood, Fatimah S.
Moen, Ann
Widdowson, Marc‐Alain
Cox, Nancy J.
Lal, Renu B
Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia
title Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia
title_full Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia
title_fullStr Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia
title_full_unstemmed Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia
title_short Divergent seasonal patterns of influenza types A and B across latitude gradient in Tropical Asia
title_sort divergent seasonal patterns of influenza types a and b across latitude gradient in tropical asia
topic Short Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4814861/
https://www.ncbi.nlm.nih.gov/pubmed/26781162
http://dx.doi.org/10.1111/irv.12372
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