Staff View: Seroepidemiological studies on Japanese Encephalitis: a systematic review

Seroepidemiological studies on Japanese Encephalitis: a systematic review

Objectives: Japanese encephalitis ( JE) is one of the major mosquito-borne infectious diseases in the Western Pacific region, accounting for 20%–30% of mortality cases. The JE virus (JEV) seroprevalence fluctuations indicate that continuous research is important for prevention and control activities...

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Main Authors:	Nur Suhada Ramli, Norayuni Mohd Ismail, Na’eemah Zaini, Mohd Firdaus Mohd Hayati, Mohammad Saffree Jeffree, Syed Sharizman Syed Abdul Rahim, Mohd Rohaizat Hassan
Format:	Article
Language:	English English
Published:	Oman Medical Specialty Board 2022
Subjects:	RA648.5-767 Epidemics. Epidemiology. Quarantine. Disinfection
Online Access:	https://eprints.ums.edu.my/id/eprint/29153/1/Seroepidemiological%20studies%20on%20Japanese%20Encephalitis_%20a%20systematic%20review.pdf https://eprints.ums.edu.my/id/eprint/29153/2/Seroepidemiological%20studies%20on%20Japanese%20Encephalitis_%20a%20systematic%20review%20_ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/29153/ https://omjournal.org/articleDetails.aspx?coType=1&aId=3097 https://doi.org/10.5001/omj.2021.86
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spelling	my.ums.eprints.291532022-08-09T01:57:32Z https://eprints.ums.edu.my/id/eprint/29153/ Seroepidemiological studies on Japanese Encephalitis: a systematic review Nur Suhada Ramli Norayuni Mohd Ismail Na’eemah Zaini Mohd Firdaus Mohd Hayati Mohammad Saffree Jeffree Syed Sharizman Syed Abdul Rahim Mohd Rohaizat Hassan RA648.5-767 Epidemics. Epidemiology. Quarantine. Disinfection Objectives: Japanese encephalitis ( JE) is one of the major mosquito-borne infectious diseases in the Western Pacific region, accounting for 20%–30% of mortality cases. The JE virus (JEV) seroprevalence fluctuations indicate that continuous research is important for prevention and control activities. By mapping JEV seroprevalence by age stratification, the population profile for immunity and susceptibility can be identified to aid in vaccination program planning. Thus, this study aimed to determine the trend of age-specific JEV seroprevalence. Methods: We conducted a systematic review of all studies conducted on JEV seroprevalence between 2010 and 2019. The two search engines used were PubMed and Web of Science. Eligible criteria were set, and articles were screened according to the Preferred Reporting Items for Systematic Reviews and Meta- Analyses guidelines. Three investigators cross-checked all articles assigned. Data were extracted into an Excel sheet, and results were tabulated in tables and graphs accordingly. Results: Four studies from four countries (Taiwan, Sri Lanka, South Korea, and India) met the eligibility criteria. The papers showed an increasing trend of JEV seropositivity in all countries as their populations reach older age cohorts. Nonetheless, there were slight downtrend notches seen among young adults in Taiwan and India before increasing after reaching more mature ages. South Korea has the highest seroprevalence rate (97.8%–98.3%) among the compared countries. This is most likely because it was the earliest to introduce the JEV vaccine in 1967, which was later made mandatory in the early 1980s, while India has the lowest seroprevalence rate (12.9%–18.1%). Among the old vaccination-naïve population, seropositivity is commonly derived from natural infection. Conclusions: Decreases in reported JE cases are mainly due to immunization. As JEV is expected to remain in nature and the zoonotic chains, the risk of infection will persist. Hence, it is important to apply JEV vaccination protocols in national immunization programs, prioritizing young children. Oman Medical Specialty Board 2022 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/29153/1/Seroepidemiological%20studies%20on%20Japanese%20Encephalitis_%20a%20systematic%20review.pdf text en https://eprints.ums.edu.my/id/eprint/29153/2/Seroepidemiological%20studies%20on%20Japanese%20Encephalitis_%20a%20systematic%20review%20_ABSTRACT.pdf Nur Suhada Ramli and Norayuni Mohd Ismail and Na’eemah Zaini and Mohd Firdaus Mohd Hayati and Mohammad Saffree Jeffree and Syed Sharizman Syed Abdul Rahim and Mohd Rohaizat Hassan (2022) Seroepidemiological studies on Japanese Encephalitis: a systematic review. Oman Medical Journal, 37. pp. 1-7. ISSN 2070-5204 https://omjournal.org/articleDetails.aspx?coType=1&aId=3097 https://doi.org/10.5001/omj.2021.86
institution	Universiti Malaysia Sabah
building	UMS Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Sabah
content_source	UMS Institutional Repository
url_provider	http://eprints.ums.edu.my/
language	English English
topic	RA648.5-767 Epidemics. Epidemiology. Quarantine. Disinfection
spellingShingle	RA648.5-767 Epidemics. Epidemiology. Quarantine. Disinfection Nur Suhada Ramli Norayuni Mohd Ismail Na’eemah Zaini Mohd Firdaus Mohd Hayati Mohammad Saffree Jeffree Syed Sharizman Syed Abdul Rahim Mohd Rohaizat Hassan Seroepidemiological studies on Japanese Encephalitis: a systematic review
description	Objectives: Japanese encephalitis ( JE) is one of the major mosquito-borne infectious diseases in the Western Pacific region, accounting for 20%–30% of mortality cases. The JE virus (JEV) seroprevalence fluctuations indicate that continuous research is important for prevention and control activities. By mapping JEV seroprevalence by age stratification, the population profile for immunity and susceptibility can be identified to aid in vaccination program planning. Thus, this study aimed to determine the trend of age-specific JEV seroprevalence. Methods: We conducted a systematic review of all studies conducted on JEV seroprevalence between 2010 and 2019. The two search engines used were PubMed and Web of Science. Eligible criteria were set, and articles were screened according to the Preferred Reporting Items for Systematic Reviews and Meta- Analyses guidelines. Three investigators cross-checked all articles assigned. Data were extracted into an Excel sheet, and results were tabulated in tables and graphs accordingly. Results: Four studies from four countries (Taiwan, Sri Lanka, South Korea, and India) met the eligibility criteria. The papers showed an increasing trend of JEV seropositivity in all countries as their populations reach older age cohorts. Nonetheless, there were slight downtrend notches seen among young adults in Taiwan and India before increasing after reaching more mature ages. South Korea has the highest seroprevalence rate (97.8%–98.3%) among the compared countries. This is most likely because it was the earliest to introduce the JEV vaccine in 1967, which was later made mandatory in the early 1980s, while India has the lowest seroprevalence rate (12.9%–18.1%). Among the old vaccination-naïve population, seropositivity is commonly derived from natural infection. Conclusions: Decreases in reported JE cases are mainly due to immunization. As JEV is expected to remain in nature and the zoonotic chains, the risk of infection will persist. Hence, it is important to apply JEV vaccination protocols in national immunization programs, prioritizing young children.
format	Article
author	Nur Suhada Ramli Norayuni Mohd Ismail Na’eemah Zaini Mohd Firdaus Mohd Hayati Mohammad Saffree Jeffree Syed Sharizman Syed Abdul Rahim Mohd Rohaizat Hassan
author_facet	Nur Suhada Ramli Norayuni Mohd Ismail Na’eemah Zaini Mohd Firdaus Mohd Hayati Mohammad Saffree Jeffree Syed Sharizman Syed Abdul Rahim Mohd Rohaizat Hassan
author_sort	Nur Suhada Ramli
title	Seroepidemiological studies on Japanese Encephalitis: a systematic review
title_short	Seroepidemiological studies on Japanese Encephalitis: a systematic review
title_full	Seroepidemiological studies on Japanese Encephalitis: a systematic review
title_fullStr	Seroepidemiological studies on Japanese Encephalitis: a systematic review
title_full_unstemmed	Seroepidemiological studies on Japanese Encephalitis: a systematic review
title_sort	seroepidemiological studies on japanese encephalitis: a systematic review
publisher	Oman Medical Specialty Board
publishDate	2022
url	https://eprints.ums.edu.my/id/eprint/29153/1/Seroepidemiological%20studies%20on%20Japanese%20Encephalitis_%20a%20systematic%20review.pdf https://eprints.ums.edu.my/id/eprint/29153/2/Seroepidemiological%20studies%20on%20Japanese%20Encephalitis_%20a%20systematic%20review%20_ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/29153/ https://omjournal.org/articleDetails.aspx?coType=1&aId=3097 https://doi.org/10.5001/omj.2021.86
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score	13.211869

Seroepidemiological studies on Japanese Encephalitis: a systematic review

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