1.Enhanced case finding and self-isolation measures in the early phase of SARS-CoV-2 Omicron transmission, Osaka, Japan, December 2021–January 2022
Miho Kobayashi ; Kensaku Kakimoto ; Yuichiro Yahata ; Yusuke Kobayashi ; Hitomi Nagai ; Chisato Tanikake ; Kazumi Fukumura ; Keiko Date ; Hiromi Murata ; Sae Kitagawa ; Yuki Yoshida ; Yui Kamoda ; Miho Akazaki ; Masaaki Tanabe ; Chika Shirai ; Tomoe Shimada ; Taro Kamigaki ; Tsuyoshi Sekizuka ; Makoto Kuroda ; Tomimasa Sunagawa
Western Pacific Surveillance and Response 2025;16(2):29-38
Objective: The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variant B.1.1.529 (Omicron) was first detected in Japan in November 2021. In Osaka, public health centres subsequently increased active case finding and encouraged self-isolation. This study investigated the effectiveness of these countermeasures.
Methods: Cases targeted for analysis were persons who had neither recently travelled abroad nor had contact with foreign tourists but tested positive for SARS-CoV-2 between 24 November 2021 and 4 January 2022 and were suspected or confirmed to have the Omicron variant. We performed a descriptive analysis and calculated the reproduction number (R) for each generation using the branching process method. Genomic sequencing data were analysed to plot a haplotype network.
Results: A total of 251 cases were analysed. The median age was 30 years, and 46% (115/251) were in their 20s or younger. The first Omicron case in Osaka was detected on 21 December 2021. Local public health centres conducted health monitoring and contact tracing. We analysed R, using information from six clusters, including 42 pairs with a clear relationship between the case and the infected contact (infector–infectee pairs); the clusters had 19, 21 and 2 cases in each subsequent generation. The basic R (t = 0) was estimated to be 3.2, and subsequent generations (t = 1, 2) of R decreased to 1.1 and 0.1, respectively. The haplotype network showed that these cases constituted a monophyletic group with others detected around Osaka, indicating that these case-related clusters had been contained and were not involved in the nationwide Omicron waves.
Discussion: Active case finding and self-isolation were found to be effective in limiting the spread of an emerging novel variant.
2.6. Healthcare Professional Education and Development for Deaf and Hard of Hearing Individuals in Rochester, NY: Transitioning from Inclusive Higher Education to Social Contribution
Yuko TAKEDA ; Ai MINAKAWA ; Masaaki YOSHIDA ; Yutaka OSUGI
Medical Education 2024;55(2):139-145
This article focuses on inclusive education for deaf and hard-of-hearing students in Rochester, New York, which prepares them to become healthcare professionals or researchers in health science fields. We highlight the unique programs for deaf and hard-of-hearing students to develop their careers at the Rochester Institute of Technology (RIT), the National Technical Institute for the Deaf (NTID), and the University of Rochester (UR). These universities also foster an inclusive work environment that caters to the needs of deaf and hard-of-hearing clinical professionals and faculty specialized in health research, enabling them to play leadership roles in their fields. Notably, Strong Memorial Hospital at UR supports deaf staff by providing interpreter services, allowing them to actively engage in their clinical work as professionals. Such seamless support, spanning from higher education to professional careers in Rochester, demonstrates a compelling model for enabling deaf and hard-of-hearing individuals to pursue and thrive in their chosen professions.
3.Social and family factors as determinants of exercise habits in Japanese elementary school children: a cross-sectional study from the Super Shokuiku School Project.
Satomi SAWA ; Michikazu SEKINE ; Masaaki YAMADA ; Yugo FUKAZAWA ; Yusuke HIRAKU
Environmental Health and Preventive Medicine 2020;25(1):54-54
BACKGROUND:
Many studies have already reported on the relationship between exercise habits and health among schoolchildren. However, few have examined social and/or family factors as determinants of exercise habits.
METHODS:
This study's participants included 1721 schoolchildren aged between 6 and 13 who were involved in the Super Shokuiku School Project in January 2016. A survey was conducted to assess gender, grade level, physical activity, lifestyle, overall health, enrichment of school life, social background, and parental lifestyles. Both dislike and lack of physical activity were used to measure poor exercise habits; correlates were analyzed using logistic regression.
RESULTS:
"Lack of close friends" had the strongest links with both dislike (adjusted odds ratio [OR] 5.30; 95% confidence interval [CI], 2.78-10.1) and lack of (adjusted OR 5.40; 95% CI, 2.81-10.4) physical activity. Further, children who engaged in long periods of screen time and lacked parental communication also tended to dislike and lack physical activity. Children with mothers who were unemployed (housewives) and had unhealthy lifestyles, as well as those with poor health, were also more likely to lack physical activity.
CONCLUSION
Social and family factors (e.g., having close friends) may be determinants of exercise habits among schoolchildren, independent of their own lifestyle factors. Although a longitudinal study is needed to determine causality, substantial attention may thus be required to these factors when promoting physical activity in children.
Adolescent
;
Age Factors
;
Child
;
Cross-Sectional Studies
;
Exercise
;
psychology
;
Family Characteristics
;
Female
;
Habits
;
Humans
;
Japan
;
Life Style
;
Male
;
Sex Factors
;
Socioeconomic Factors
4.Clinical and Imaging Features of Multiple System Atrophy: Challenges for an Early and Clinically Definitive Diagnosis
Hirohisa WATANABE ; Yuichi RIKU ; Kazuhiro HARA ; Kazuya KAWABATA ; Tomohiko NAKAMURA ; Mizuki ITO ; Masaaki HIRAYAMA ; Mari YOSHIDA ; Masahisa KATSUNO ; Gen SOBUE
Journal of Movement Disorders 2018;11(3):107-120
Multiple system atrophy (MSA) is an adult-onset, progressive neurodegenerative disorder. Patients with MSA show various phenotypes during the course of their illness, including parkinsonism, cerebellar ataxia, autonomic failure, and pyramidal signs. Patients with MSA sometimes present with isolated autonomic failure or motor symptoms/signs. The median duration from onset to the concomitant appearance of motor and autonomic symptoms is approximately 2 years but can range up to 14 years. As the presence of both motor and autonomic symptoms is essential for the current diagnostic criteria, early diagnosis is difficult when patients present with isolated autonomic failure or motor symptoms/signs. In contrast, patients with MSA may show severe autonomic failure and die before the presentation of motor symptoms/signs, which are currently required for the diagnosis of MSA. Recent studies have also revealed that patients with MSA may show nonsupporting features of MSA such as dementia, hallucinations, and vertical gaze palsy. To establish early diagnostic criteria and clinically definitive categorization for the successful development of disease-modifying therapy or symptomatic interventions for MSA, research should focus on the isolated phase and atypical symptoms to develop specific clinical, imaging, and fluid biomarkers that satisfy the requirements for objectivity, for semi- or quantitative measurements, and for uncomplicated, worldwide availability. Several novel techniques, such as automated compartmentalization of the brain into multiple parcels for the quantification of gray and white matter volumes on an individual basis and the visualization of α-synuclein and other candidate serum and cerebrospinal fluid biomarkers, may be promising for the early and clinically definitive diagnosis of MSA.
Biomarkers
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Brain
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Cerebellar Ataxia
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Cerebrospinal Fluid
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Dementia
;
Diagnosis
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Early Diagnosis
;
Hallucinations
;
Humans
;
Multiple System Atrophy
;
Neurodegenerative Diseases
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Paralysis
;
Parkinsonian Disorders
;
Phenotype
;
White Matter
5.A Case of Scratched Infection by Capnocytophaga canimorsus Diagnosed Early with Microscopic Peripheral Blood Smear Examination
Hiroko KAJIKAWA ; Mitsuyasu IKEDA ; Rina YAMAKAWA ; Kaori TOMARU ; Kouji IKEBE ; Kayoko YAMAMOTO ; Manani SASATANI ; Seishi MIZUNO ; Takashi FUJII ; Masaaki SAKURAYA ; Kenichi YOSHIDA
Journal of the Japanese Association of Rural Medicine 2016;65(4):843-849
Capnocytophaga canimorsus is a spindle-shaped facultatively anaerobic Gram-negative rod in the oral cavity of dogs and cats. C. canimorsus rarely infects humans through an animal bite or scratch. However, it leads to severe sepsis once infection occurs, and the fatality rate is estimated to be up to 30%. The patient was a 56-year-old man with fatigue and fever. Sepsis with thrombocytopenia was suspected from the blood examination results. We decided to conduct microscopic examination of a non-stained peripheral blood smear and identified bacteria; therefore, Gram stain was immediately performed and spindle-shaped Gram-negative bacilli were detected. Additionally, the patient had a history of a bite and scratch by his cat. We suspected C. canimorsus infection from the microscopic examination findings and history. Moreover, we determined early that the pathogenic bacterium was C. canimorsus by blood culture. With immediate and proper treatment based on these results, we could rescue this septic patient with disseminated intravascular coagulation. Microscopic examination of non-stained peripheral blood smear is helpful for the early diagnosis of C. canimorsus infection.
6.Time course of expression of intermediate filament protein vimentin, nestin and desmin in rat renal glomerular injury.
Jun ZOU ; Tian-hui CHANG ; He CHANG ; Eishin YAOITA ; Yutaka YOSHIDA ; Masaaki NAMETA ; Tadashi YAMAMOTO ; Xin JIN
Chinese Medical Journal 2007;120(13):1203-1205
Animals
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Desmin
;
analysis
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genetics
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Female
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Immunohistochemistry
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Intermediate Filament Proteins
;
analysis
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genetics
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Kidney Glomerulus
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chemistry
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Nephrosis
;
metabolism
;
Nerve Tissue Proteins
;
analysis
;
genetics
;
Nestin
;
Podocytes
;
chemistry
;
RNA, Messenger
;
analysis
;
Rats
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Rats, Inbred WKY
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Vimentin
;
analysis
;
genetics
7.A Successful Case of Sutureless Pulmonary Artery Plasty Using Autologous Tissue for Severe Pulmonary Stenosis after a Rastelli Operation.
Masahiro Yoshida ; Masaaki Yamagishi ; Yoshiaki Yamada ; Katsuji Fujiwara ; Jun Fukumoto ; Keisuke Shunto ; Nobuo Kitamura
Japanese Journal of Cardiovascular Surgery 2002;31(3):236-238
An 11-year-old boy, who underwent a Rastelli operation using a 14mm artificial graft and left pulmonary artery (PA) plasty with an autologous pericardium patch 7 years previously, had severe recurrent left pulmonary stenosis. Reoperation was performed including right ventricular outflow tract reconstruction and left PA plasty. The PA at the most stenotic site was only 2mm in diameter; it was enlarged to 10mm by good exposure and an incision on the pulmonary intima. A bovine pericardium patch with a handmade ePTFE valve was sutured onto the autologous tissue not onto the pulmonary intima to avoid restenosis and in expectation of the growth of the pulmonary orifice. On postoperative 3-D CT, the left pulmonary artery was patent and 9mm in diameter. Pulmonary scintigraphy showed an improvement in the left pulmonary perfusion. This sutureless technique was useful in this case of severe pulmonary stenosis.
8.Treatment of Patients with Acute Type A Dissection with Malperfusion.
Yoshiaki Fukumura ; Masaaki Bando ; Yasushi Shimoe ; Kazuhisa Katayama ; Homare Yoshida ; Yoshihiko Kataoka
Japanese Journal of Cardiovascular Surgery 2001;30(4):182-186
Although the results of surgical treatment for acute type A dissection have improved because of progress in surgical techniques, the prognosis is still very poor and optimal therapeutic approach is still not clearly established for cases of acute dissection complicated with malperfusion. Of 134 patients who presented with acute aortic dissection between January 1986 and June 1999, 57 had acute type A dissection and 10 had acute type A dissection with malperfusion. Patient age ranged from 53 to 78 (average, 64.6) years. There were 6 men and 4 women. There was accompanying cerebral ischemia in 3 cases, coronary ischemia in 1, visceral ischemia in 5, renal ischemia in 2, ischemia of the extremities in 7, and multiple organ ischemia in 5. One patient died before surgery, and another patient died after sternotomy due to aortic rupture. The other 8 patients underwent surgical operations. The following surgical procedures were performed: bypass grafting to the superior mesenteric artery was performed in 1 patient, stent implantation to the right coronary artery followed by ascending aortic replacement (19th day after onset) was performed in 1, and aortic repair (5 ascending aortic replacements and 1 hemiarch replacement) in the acute phase was performed in 6. The mortality rates were 66.7% (2/3) in patients with cerebral ischemia, 0% (0/1) in the patient with coronary ischemia, 80% (4/5) in those with visceral ischemia, 100% (2/2) in those with renal ischemia, 42.9% (3/7) in those with ischemia of the extremities, 80% (4/5) in those with multiple organ ischemia, and 50% (5/10) in all cases. All patients whose base excess (B.E.) was less than -10mEq/l on admission died (4/4). We conclude that in order to improve surgical results in patients with acute type A dissection with malperfusion, different approaches may be required for each patient. The combination of aortic repair and percutaneous reperfusion are important. Arterial blood gas analyses were simple, and the values of B. E. at admission were useful to determine the surgical strategy in these patients and to predict their prognosis.
9.Usefulness of MR Angiography with Magnetization Transfer Contrast in Screening for Cerebrovascular Diseases.
Kenji OGIHARA ; Tadahisa TAKIZAWA ; Masaaki ITIMURA ; Satosi YOSHIDA ; Tetuya SAITOU ; Tatsuo NAGAMINE ; Youji NAKAZAWA ; Sinobu ITOU ; Manabu MAEDA ; Kunio HASHIMOTO
Journal of the Japanese Association of Rural Medicine 1995;44(4):565-568
Since MR angiography (MR) can demonstrate the whole brain arterial system without introduction of contrast medium, it is very useful in screening for aneurysm, AVM and vascular occlusion in outpatients.
There are two methods in MRA-subtraction and non-subtraction methods (time of flight, TOF).
The magnetization transfer contrast (MTC) technique can demonstrate smaller vessels and slower blood flow than any conventional TOF-MRA.
Compared with the subtraction MRA, the MTC-TOF-MRA demonstrates smaller vessels clearly in a shorter time. By Gd-enhancement, the image of the arterial system can be also improved on the MTC method.
10.An investigation on the actual conditions of acupuncture school graduates - Their courses, Medical charge and annual income, etc.
Yasuhiro HONDA ; Hiromasa INOUE ; Hiroshi YOSHIDA ; Hideo FUJIWARA ; Sei FURUTANI ; Futami KOSAKA ; Masaaki SUGIHARA
Journal of the Japan Society of Acupuncture and Moxibustion 1985;35(1):57-61
A questionnairing was conducted on those who had graduated from acupuncture schools for last three years. 288 questionnaires, that is, 28.8% of the total were answerd.
As the result, 41% of the graduates are practicing, 27% are working for institutions connected with acupuncture, and 28% are working in hospitals.
Combining present practitioners and those who are to start practice, it seems 76% of the graduates enter practice; most of the graduates aim at setting up practice. Which course to be taken makes the difference in medical charge, the number of patients, and their annual income.


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