We analysed 2006-2016 national influenza surveillance data in Japan with regards to age-, sex-, and predominant virus-related epidemic patterns the prevalence of serum virus antibodies. found a significant increase both children (≤ 19 years old) adults (≥ 20 over time. The was higher (0.33 [95% CI 0.26-0.40]) than (0.09 0.07-0.11]). Additionally, mean antibodies for A(H1N1)pdm09 A(H3N2) significantly adults, whereas B lineages relatively low adults. There biennial cycle peak children, which...

Background Norovirus (NoV) is a major cause of gastroenteritis during the autumn and winter seasons in Japan as well other temperate climate regions. Most outbreaks are thought to occur by secondary attacks through person-to-person infection fecal-oral route. Severe cases found young children or patients with chronic diseases. Clarifying patterns epidemic diffusion important for considering effective monitoring surveillance possible prevention. Methods We considered predominant viral...

SUMMARY Measles elimination relies on vaccination programmes. In Japan, a major outbreak started in 2007. response, 5-year two-dose catch-up programme was initiated April 2008 for children 13–16-years-old. this study, we analysed the epidemic curves, incidence rates each age group, virus genotype, coverage and ratio of measles gelatin particle agglutination (PA) antibody using surveillance data 2008–2015. Monthly case counts markedly decreased as increased. D5, which is endemic type,...

The identification of geographic trends an influenza pandemic is important for analyzing its social epidemic factors. We performed spatiotemporal analyses focusing on the metropolitan areas in Japan by using influenza-like illness (ILI) sentinel surveillance data (H1N1) 2009 and seasonal influenza. curves spread features expressed kriging method information system (GIS) correlations between reported cases demographic were analyzed. incidence increased gradually at beginning showed more...

During the recent emergence of COVID-19, an increased practice hand hygiene coincided with reduced incidence norovirus epidemic in Japan, which is similar to experience pandemic flu 2009. We investigated relationship between sales products, including liquid soap and alcohol-based sanitizer, trend epidemic. used national gastroenteritis surveillance data across Japan 2020 2021 compared base statistics these two years average previous 10 (2010-2019). calculated correlations (Spearman's Rho)...

SUMMARY Norovirus (NoV) epidemics normally peak in December Japan; however, the 2009–2010 season was delayed until fourth week of January 2010. We suspected intensive hand hygiene that conducted for a previous pandemic influenza 2009 as cause this delay. analysed NoV epidemic trend, based on national surveillance data, and its associations with monthly output data products, including alcohol-based skin antiseptics soap. The incidence had lowest number recorded cases five seasons studied...

SUMMARY We studied the spatial trend of norovirus (NoV) epidemics using sentinel gastroenteritis surveillance data for patients aged <15 years ( n = 140) in Tokyo area 2006–2007 to 2008–2009 seasons utilizing kriging method geographical information system (GIS). This is first study spreading pattern NoV data. Correlations cases between and with demographic were examined identify related factors. A similar diffusion was observed over seasons, its mean correlation significantly high. higher...

Abstract We conducted a 7-year case–control study of people ≥30 years age on the prevalence influenza, gastroenteritis, hepatitis, and pneumonia infections to indirectly examine whether these correlated malignant cancer formation. Data were extracted from large medical claims database Japanese social health insurance system; case group included 2,354 with their first diagnosis in 7th year this study, control 48,395 no by year. The yearly rates increased throughout period. Age-adjusted ORs...

Purpose: Psychogenic non-epileptic seizures (PNES) are psychogenic disorders that often resemble epileptic seizures.Herein, we describe the recent clinical trends of PNES by using data from a large, claims-based Japanese database obtained Japan Medical Data Center.Methods: A 10-year epidemiological study patients all ages with newly diagnosed was conducted.Data were extracted International Classification Diseases 10th Revision (ICD-10) diagnostic codes.Prevalence in new epilepsy and period...

Although the transmissibility of SARS-CoV-2 in winter is thought to increase through viral droplets when coughing, current epidemiological data this regard are limited.Using national surveillance autumn and seasons Hokkaido, Japan, between February 2020 2021, we analysed relationship case ratio prevalence rate coughing patients with PCR-confirmed two age groups (0-40s 50-100s) concomitant air temperature humidity.The 7893 cases symptomatic PCR-positive consisted 5361 young group 2532 older...

Imported dengue into naive areas is a recognized but unquantified threat. Differentiating imported and autochthonous cases remains problematic. A threshold approach applied to Japan identified several aberrant incidences of dengue. Despite these alerts, no epidemics occurred other than 1 in Yoyogi Park Tokyo, which was probably an unusual event.

Annual influenza epidemics occur worldwide resulting in considerable morbidity and mortality. Spreading pattern of is not well understood because it often hampered by the quality surveillance data that limits reliability analysis. In Japan, reported on a weekly basis from 5,000 hospitals clinics nationwide under scheme National Infectious Disease Surveillance. The collected are available to public as reports which were summarized into number patient visits per hospital or clinic each 47...

We investigated the relationship between epidemics and soil radiation through an exploratory study using sentinel surveillance data (individuals aged <20 years) during last three epidemic seasons of influenza norovirus in Japan. used a spatial analysis method geographical information system (GIS). mapped spreading patterns from incidence rates. calculated average [dm (μGy/h)] for each site on uranium, thorium, potassium oxide examined rate units 0·01 μGy/h. The correlations were assessed....