Description of Hospitalized Cases of Influenza A(H1N1)pdm09 Infection on the Basis of the National Hospitalized-Case Surveillance, 2009&amp;ndash;2010, Japan

Shimada, Tomoe; Sunagawa, Tomimasa; Taniguchi, Kiyosu; Yahata, Yuichiro; Kamiya, Hajime; Yamamoto, K.; Yasui, Yoshinori; Okabe, Nobuhiko

doi:10.7883/yoken.jjid.2014.125

Cited by 8 publications

(6 citation statements)

References 39 publications

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“…Data obtained from iNESID revealed that the overall hospitalization rate for influenza A(H1N1)pdm09 infection was 5.8 cases per 100,000 population; cases hospitalized for non-therapeutic purposes, such as mere quarantine, were excluded. The figure is almost one fourth of that which was reported from Australia and the USA [16], supporting the lower frequency of severe illness in Japan during the pandemic compared to other countries. So far, the NESID data on nationwide hospitalization rate of influenza after the first wave of the 2009 pandemic has not been published.…”

Section: National Influenza Surveillancesupporting

confidence: 65%

“…This program was revised and updated to its present form following the revision of the Infectious Disease Control Law in 1999 [13–16]. The system is currently called National Epidemiological Surveillance for Infectious Diseases (NESID), which includes a mandatory reporting system for nationally notifiable diseases and sentinel surveillance systems for various kinds of infectious diseases [17].…”

Section: National Influenza Surveillancementioning

confidence: 99%

“…During the pandemic in 2009, physicians had to report all hospitalized cases with confirmed influenza A and influenza B via the internet-based National Epidemiological Surveillance of Infectious Diseases (iNESID). This web-based data collection system was made available only from July 24 to September 5, 2009 [16]. Data obtained from iNESID revealed that the overall hospitalization rate for influenza A(H1N1)pdm09 infection was 5.8 cases per 100,000 population; cases hospitalized for non-therapeutic purposes, such as mere quarantine, were excluded.…”

Section: National Influenza Surveillancementioning

confidence: 99%

See 2 more Smart Citations

Japanese Surveillance Systems and Treatment for Influenza

Zaraket

Saito

2016

Curr Treat Options Infect Dis

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Opinion statementInfluenza management and surveillance programs in Japan possess several unique features. The national influenza surveillance is affiliated with National Epidemiological Surveillance for Infectious Diseases (NESID) and features sentinel outpatient surveillance, virological surveillance, and reports on hospitalization, mortality, and influenza-associated encephalopathy. Of note, information on the number of student absences and class/grade/school closures due to influenza are also reported to the government and made publically available. A private online influenza surveillance portal by volunteer doctors provides a real-time information source for the Japanese clinicians and the general public. For influenza treatment, three classes of drugs are approved and covered by national medical insurance in Japan: M2 inhibitors, neuraminidase inhibitors (NAIs), and a polymerase inhibitor. Four NAIs, oseltamivir, zanamivir, laninamivir, and peramivir, are licensed in Japan and are prescribed to seven to eight million patients annually. NAIs are prescribed to any influenza outpatient rather than being limited to severe cases. The majority (80–95 %) of patients start the treatment within 48 h of onset. Laninamivir and peramivir were used almost solely in Japan, until the approval of the latter drug by the FDA. Observational studies showed that the two drugs have equal effectiveness as oseltamivir and zanamivir. The Japanese approach to influenza surveillance and management has facilitated bringing new influenza antivirals to the markets and has driven innovative research in this field. New classes of antivirals, including polymerase inhibitors and cap-dependent endonuclease inhibitor, provide novel tools for treatment of influenza in Japan and the rest of the world.

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Section: National Influenza Surveillancesupporting

confidence: 65%

Section: National Influenza Surveillancementioning

confidence: 99%

Section: National Influenza Surveillancementioning

confidence: 99%

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Japanese Surveillance Systems and Treatment for Influenza

Zaraket

Saito

2016

Curr Treat Options Infect Dis

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“…The surveillance program for infectious diseases in Japan, which was begun in 1981 and forms the basis for influenza surveillance of outpatients [ 14 , 15 ], was revised and updated to its current format following the revision of the Infectious Disease Control Law in 2014 [ 14 – 17 ]. The system requires mandatory reporting of nationally notifiable diseases and sentinel surveillance systems for various types of infectious diseases [ 18 ].…”

Section: Methodsmentioning

confidence: 99%

The relationship between seasonal influenza and telephone triage for fever: A population-based study in Osaka, Japan

et al. 2020

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Background Replacing traditional surveillance with syndromic surveillance is one of the major interests in public health. However, it is unclear whether the number of influenza patients is associated with the number of telephone triages in Japan. Methods This retrospective, observational study was conducted over the six-year period between January 2012 to December 2017. We used the dataset of a telephone triage service in Osaka, Japan and the data on influenza patients published from the Information Center of Infectious Disease in Osaka prefecture. Using a linear regression model, we calculated Spearman's rank-order coefficient and R 2 of the regression model to assess the relationship between the number of telephone triages for fever and the number of influenza patients in Osaka. Furthermore, we calculated Spearman's rank-order coefficient and R 2 between the predicted weekly number of influenza patients from the linear regression model and the actual weekly number of influenza patients for influenza outbreak season (December-April). Results There were 465,971 patients with influenza, and the number of telephone triages for fever was 420,928 among 1,065,628 total telephone triages during the study period. Our analysis showed that the Spearman rank-order coefficient was 0.932, and R 2 and adjusted R 2 were 0.869 and 0.842, respectively. The Spearman rank-order coefficient was 0.923 (P<0.001) and R 2 was 0.832 in December-April (P<0.001).

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“…The surveillance program for infectious diseases in Japan, which was begun in 1981 and forms the basis for influenza surveillance of outpatients [12,13], was revised and updated to its current format following the revision of the Infectious Disease Control Law in 2014 [12][13][14][15]. The system requires mandatory reporting of nationally notifiable diseases and sentinel surveillance systems for various types of infectious diseases [16].…”

Section: Outpatient Surveillance Of Influenza-like Illness In Japanmentioning

confidence: 99%

The relationship between seasonal influenza and telephone triage for fever: A population-based study in Osaka, Japan

Katayama

Kiyohara

Kitamura

et al. 2019

Preprint

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Background: Replacing traditional surveillance with syndromic surveillance is one of the major interests in public health. However, it is unclear whether the number of influenza patients is associated with the number of telephone triages in Japan. Methods: This retrospective, observational study was conducted over the six-year period between January 2012 to December 2017. We used the dataset of a telephone triage service in Osaka, Japan and the data on influenza patients published from the Information Center of Infectious Disease in Osaka prefecture. Using a linear regression model, we calculated Spearman’s rank-order coefficient and R 2 of the regression model to assess the relationship between the number of telephone triages for fever and the number of influenza patients in Osaka. Furthermore, we calculated Spearman’s rank-order coefficient and R 2 between the predicted weekly number of influenza patients from the linear regression model and the actual weekly number of influenza patients for each season (January-March, April-June, July-September, October-December). Results: There were 465,971 patients with influenza, and the number of telephone triages for fever was 420,928 among 1,065,628 total telephone triages during the study period. Our analysis showed that the Spearman rank-order coefficient was 0.932 and R 2 and adjusted R 2 were 0.869 and 0.842, respectively. The highest Spearman rank-order coefficient was 0.896 ( P <0.001) and R 2 was 0.803 in January-March ( P <0.001). Conclusion: In this population, we revealed a positive relationship between the number of influenza patients and the number of telephone triages for fever, especially in January-March.

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Description of Hospitalized Cases of Influenza A(H1N1)pdm09 Infection on the Basis of the National Hospitalized-Case Surveillance, 2009–2010, Japan

Cited by 8 publications

References 39 publications

Japanese Surveillance Systems and Treatment for Influenza

Japanese Surveillance Systems and Treatment for Influenza

The relationship between seasonal influenza and telephone triage for fever: A population-based study in Osaka, Japan

The relationship between seasonal influenza and telephone triage for fever: A population-based study in Osaka, Japan

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