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  1. Article: Anti-Muscle-Specific Kinase (MuSK) Antibody-Positive Myasthenia Gravis Presenting With Dyspnea in an Elderly Woman: A Case Report.

    Shiozumi, Tadaharu / Okada, Nobunaga / Matsuyama, Tasuku / Yamahata, Yoshihiro / Ohta, Bon

    Cureus

    2023  Volume 15, Issue 12, Page(s) e50480

    Abstract: Myasthenia gravis (MG) is an autoimmune disease and represents one of the most common disorders associated with neuromuscular transmission defects. Within MG, the anti-muscle-specific kinase antibody-positive subtype (MuSK-positive MG) is rare. While it ... ...

    Abstract Myasthenia gravis (MG) is an autoimmune disease and represents one of the most common disorders associated with neuromuscular transmission defects. Within MG, the anti-muscle-specific kinase antibody-positive subtype (MuSK-positive MG) is rare. While it shares similarities with the common form of MG by presenting with ocular weakness, MuSK-positive MG typically presents with more atypical symptoms. Although MuSK-positive MG can lead to type 2 respiratory failure due to respiratory weakness, there have been limited reports where initial presentation involves only respiratory compromise. This study details a case of MuSK-positive MG presenting dyspnea. An 84-year-old female presented to the emergency department due to a three-day history of progressive respiratory distress, characterized by increased respiratory effort and shallow breathing, resulting in a diagnosis of type 2 respiratory failure. Despite the absence of neurological abnormalities, she tested positive for anti-muscle-specific kinase antibodies, confirming a diagnosis of MuSK-positive MG. This case highlights the significance of considering MG in the context of type 2 respiratory failure, even in the absence of typical neurological symptoms, especially in elderly patients.
    Language English
    Publishing date 2023-12-13
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.50480
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Preparation for Quarantine on the Cruise Ship Diamond Princess in Japan due to COVID-19.

    Yamahata, Yoshihiro / Shibata, Ayako

    JMIR public health and surveillance

    2020  Volume 6, Issue 2, Page(s) e18821

    Abstract: Background: Japan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020.: Objective: We aim ... ...

    Abstract Background: Japan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020.
    Objective: We aim to describe the medical activities initiated and difficulties in implementing quarantine on a cruise ship.
    Methods: Reverse transcription-polymerase chain reaction (RT-PCR) tests for SARS-CoV-2 were performed for all 3711 people (2666 passengers and 1045 crew) on board.
    Results: Of those tested, 696 (18.8%) tested positive for coronavirus disease (COVID-19), of which 410 (58.9%) were asymptomatic. We also confirmed that 54% of the asymptomatic patients with a positive RT-PCR result had lung opacities on chest computed tomography. There were many difficulties in implementing quarantine, such as creating a dividing traffic line between infectious and noninfectious passengers, finding hospitals and transportation providers willing to accept these patients, transporting individuals, language barriers, and supporting daily life. As of March 8, 2020, 31 patients (4.5% of patients with positive RT-PCR results) were hospitalized and required ventilator support or intensive care, and 7 patients (1.0% of patients with positive RT-PCR results) had died.
    Conclusions: There were several difficulties in implementing large-scale quarantine and obtaining medical support on the cruise ship. In the future, we need to prepare for patients' transfer and the admitting hospitals when disembarking the passengers. We recommend treating the crew the same way as the passengers to control the infection. We must also draw a plan for the future, to protect travelers and passengers from emerging infectious diseases on cruise ships.
    MeSH term(s) Adolescent ; Betacoronavirus ; COVID-19 ; COVID-19 Testing ; Clinical Laboratory Techniques ; Coronavirus/genetics ; Coronavirus/isolation & purification ; Coronavirus Infections/diagnosis ; Coronavirus Infections/epidemiology ; Coronavirus Infections/prevention & control ; Coronavirus Infections/transmission ; Disease Outbreaks/prevention & control ; Female ; Humans ; Japan ; Male ; Pandemics/prevention & control ; Pneumonia, Viral/diagnosis ; Pneumonia, Viral/epidemiology ; Pneumonia, Viral/prevention & control ; Pneumonia, Viral/transmission ; Public Health ; Quarantine/methods ; Reverse Transcriptase Polymerase Chain Reaction ; SARS-CoV-2 ; Ships ; Travel
    Keywords covid19
    Language English
    Publishing date 2020-05-11
    Publishing country Canada
    Document type Journal Article
    ISSN 2369-2960
    ISSN (online) 2369-2960
    DOI 10.2196/18821
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Strategies for preventing sudden unexpected COVID-19 deaths at home.

    Matsuyama, Tasuku / Yamahata, Yoshihiro / Ohta, Bon

    Resuscitation

    2020  Volume 157, Page(s) 106–107

    MeSH term(s) COVID-19/epidemiology ; Cause of Death/trends ; Death, Sudden/epidemiology ; Death, Sudden/etiology ; Death, Sudden/prevention & control ; Global Health ; Humans ; Pandemics ; Practice Guidelines as Topic ; SARS-CoV-2
    Keywords covid19
    Language English
    Publishing date 2020-10-23
    Publishing country Ireland
    Document type Letter
    ZDB-ID 189901-6
    ISSN 1873-1570 ; 0300-9572
    ISSN (online) 1873-1570
    ISSN 0300-9572
    DOI 10.1016/j.resuscitation.2020.09.039
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Preparation for the Quarantine of The Diamond Princess Cruise Ship for COVID-19 in Japan: Study Design

    Yamahata, Yoshihiro / Shibata, Ayako

    JMIR Public Health Surveill

    Abstract: BACKGROUND: Japan has experienced the large-scale quarantine on the cruise ship, the Diamond Princess, in an attempt to infectious control for the novel coronavirus (SARS-CoV-2) in February 2020 OBJECTIVE: We will describe the medical activities and the ... ...

    Abstract BACKGROUND: Japan has experienced the large-scale quarantine on the cruise ship, the Diamond Princess, in an attempt to infectious control for the novel coronavirus (SARS-CoV-2) in February 2020 OBJECTIVE: We will describe the medical activities and the difficulties of the cruise ship quarantine METHODS: Reverse Transcription-Polymerase Chain Reaction (RT-PCR) tests for SARS-CoV-2 were performed on all 3,711 persons (2,666 passengers and 1,045 crew) RESULTS: Six-hundred ninety-six (18 8%) reported positive, of which 410 (58 9%) were asymptomatic We also confirmed that 54% of the asymptomatic patient with RT-PCR-positive had lung opacities when they have a chest CT (Computed tomography) There were many difficulties onboard, such as creating a dividing traffic line between infectious and non-infectious passengers, finding hospitals and transportation willing to accept these patients, transporting individuals, language barriers, and supporting daily life As of March 8, thirty-one patients (4 5% of RT-PCR test positives) were hospitalized requiring ventilator support or intensive care, and seven patients (1 0% of RT-PCR test positives) died CONCLUSIONS: There were several difficulties in terms of large-scale quarantine and medical support on the cruise ship We need to prepare the patients' transfer and admitting hospitals when disembarking the passengers We recommend treating the crew as same as the passengers with the infection control principle We must make a plan ahead to protects the travelers and passengers from the emerging infectious diseases on cruise ships
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #178986
    Database COVID19

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  5. Article: Preparation for Quarantine on the Cruise Ship Diamond Princess in Japan due to COVID-19

    Yamahata, Yoshihiro / Shibata, Ayako

    JMIR Public Health Surveill

    Abstract: BACKGROUND: Japan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020. OBJECTIVE: We aim to ... ...

    Abstract BACKGROUND: Japan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020. OBJECTIVE: We aim to describe the medical activities initiated and difficulties in implementing quarantine on a cruise ship. METHODS: Reverse transcription-polymerase chain reaction (RT-PCR) tests for SARS-CoV-2 were performed for all 3711 people (2666 passengers and 1045 crew) on board. RESULTS: Of those tested, 696 (18.8%) tested positive for coronavirus disease (COVID-19), of which 410 (58.9%) were asymptomatic. We also confirmed that 54% of the asymptomatic patients with a positive RT-PCR result had lung opacities on chest computed tomography. There were many difficulties in implementing quarantine, such as creating a dividing traffic line between infectious and noninfectious passengers, finding hospitals and transportation providers willing to accept these patients, transporting individuals, language barriers, and supporting daily life. As of March 8, 2020, 31 patients (4.5% of patients with positive RT-PCR results) were hospitalized and required ventilator support or intensive care, and 7 patients (1.0% of patients with positive RT-PCR results) had died. CONCLUSIONS: There were several difficulties in implementing large-scale quarantine and obtaining medical support on the cruise ship. In the future, we need to prepare for patients' transfer and the admitting hospitals when disembarking the passengers. We recommend treating the crew the same way as the passengers to control the infection. We must also draw a plan for the future, to protect travelers and passengers from emerging infectious diseases on cruise ships.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #221017
    Database COVID19

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  6. Article ; Online: Preparation for Quarantine on the Cruise Ship Diamond Princess in Japan due to COVID-19

    Yamahata, Yoshihiro / Shibata, Ayako

    JMIR Public Health and Surveillance, Vol 6, Iss 2, p e

    2020  Volume 18821

    Abstract: BackgroundJapan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020. ObjectiveWe aim to ... ...

    Abstract BackgroundJapan implemented a large-scale quarantine on the Diamond Princess cruise ship in an attempt to control the spread of the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in February 2020. ObjectiveWe aim to describe the medical activities initiated and difficulties in implementing quarantine on a cruise ship. MethodsReverse transcription–polymerase chain reaction (RT-PCR) tests for SARS-CoV-2 were performed for all 3711 people (2666 passengers and 1045 crew) on board. ResultsOf those tested, 696 (18.8%) tested positive for coronavirus disease (COVID-19), of which 410 (58.9%) were asymptomatic. We also confirmed that 54% of the asymptomatic patients with a positive RT-PCR result had lung opacities on chest computed tomography. There were many difficulties in implementing quarantine, such as creating a dividing traffic line between infectious and noninfectious passengers, finding hospitals and transportation providers willing to accept these patients, transporting individuals, language barriers, and supporting daily life. As of March 8, 2020, 31 patients (4.5% of patients with positive RT-PCR results) were hospitalized and required ventilator support or intensive care, and 7 patients (1.0% of patients with positive RT-PCR results) had died. ConclusionsThere were several difficulties in implementing large-scale quarantine and obtaining medical support on the cruise ship. In the future, we need to prepare for patients’ transfer and the admitting hospitals when disembarking the passengers. We recommend treating the crew the same way as the passengers to control the infection. We must also draw a plan for the future, to protect travelers and passengers from emerging infectious diseases on cruise ships.
    Keywords Public aspects of medicine ; RA1-1270
    Subject code 610
    Language English
    Publishing date 2020-05-01T00:00:00Z
    Publisher JMIR Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Hospital at Home for Elderly COVID-19 Patients: A Preliminary Report with 100 Patients.

    Miyamoto, Yuki / Matsuyama, Tasuku / Kunimitsu, Katsutomo / Nagano, Hiroyuki / Yamada, Yoshie / Murakami, Shigemi / Yamahata, Yoshihiro / Ohta, Bon / Morikami, Yoshiki / Nakagawa, Masanori

    Journal of clinical medicine

    2022  Volume 11, Issue 7

    Abstract: Hospital-at-home (HaH) care is useful for patients with COVID-19 and an alternative strategy when hospital capacity is under pressure due to patient surges. However, the efficacy and safety of HaH in elderly patients with COVID-19 remain unknown. In ... ...

    Abstract Hospital-at-home (HaH) care is useful for patients with COVID-19 and an alternative strategy when hospital capacity is under pressure due to patient surges. However, the efficacy and safety of HaH in elderly patients with COVID-19 remain unknown. In Kyoto city, we conducted a retrospective medical record review of HaH care focused on elderly COVID-19 patients from 4 February to 25 June 2021. Eligible patients were (1) COVID-19 patients aged ≥70 years and those who lived with them or (2) COVID-19 patients aged <70 years with special circumstances and those who lived with them. During the study period, 100 patients received HaH care. Their median age was 76 years (interquartile range 56−83), and 65% were over 70 years. Among 100 patients, 36 (36%) had hypoxia (oxygen saturation ≤ 92%), 21 (21%) received steroid medication, and 34 (34%) received intravenous fluids. Although 22 patients were admitted to the hospital and 3 patients died there, no patients died during HaH care. HaH care may be safe and effective in elderly patients with COVID-19. Our study shows that HaH provides an alternative strategy for treating COVID-19 patients and can reduce the healthcare burden at hospitals.
    Language English
    Publishing date 2022-03-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm11071850
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Hospital at Home for Elderly COVID-19 Patients

    Yuki Miyamoto / Tasuku Matsuyama / Katsutomo Kunimitsu / Hiroyuki Nagano / Yoshie Yamada / Shigemi Murakami / Yoshihiro Yamahata / Bon Ohta / Yoshiki Morikami / Masanori Nakagawa

    Journal of Clinical Medicine, Vol 11, Iss 1850, p

    A Preliminary Report with 100 Patients

    2022  Volume 1850

    Abstract: Hospital-at-home (HaH) care is useful for patients with COVID-19 and an alternative strategy when hospital capacity is under pressure due to patient surges. However, the efficacy and safety of HaH in elderly patients with COVID-19 remain unknown. In ... ...

    Abstract Hospital-at-home (HaH) care is useful for patients with COVID-19 and an alternative strategy when hospital capacity is under pressure due to patient surges. However, the efficacy and safety of HaH in elderly patients with COVID-19 remain unknown. In Kyoto city, we conducted a retrospective medical record review of HaH care focused on elderly COVID-19 patients from 4 February to 25 June 2021. Eligible patients were (1) COVID-19 patients aged ≥70 years and those who lived with them or (2) COVID-19 patients aged <70 years with special circumstances and those who lived with them. During the study period, 100 patients received HaH care. Their median age was 76 years (interquartile range 56–83), and 65% were over 70 years. Among 100 patients, 36 (36%) had hypoxia (oxygen saturation ≤ 92%), 21 (21%) received steroid medication, and 34 (34%) received intravenous fluids. Although 22 patients were admitted to the hospital and 3 patients died there, no patients died during HaH care. HaH care may be safe and effective in elderly patients with COVID-19. Our study shows that HaH provides an alternative strategy for treating COVID-19 patients and can reduce the healthcare burden at hospitals.
    Keywords COVID-19 ; hospital at home ; elderly ; patient surge ; healthcare burden ; home care medicine ; Medicine ; R
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: PDZD8-deficient mice accumulate cholesteryl esters in the brain as a result of impaired lipophagy.

    Morita, Keiko / Wada, Mariko / Nakatani, Kohta / Matsumoto, Yuki / Hayashi, Nahoki / Yamahata, Ikuko / Mitsunari, Kotone / Mukae, Nagi / Takahashi, Masatomo / Izumi, Yoshihiro / Bamba, Takeshi / Shirane, Michiko

    iScience

    2022  Volume 25, Issue 12, Page(s) 105612

    Abstract: Dyslipidemia including the accumulation of cholesteryl esters (CEs) in the brain is associated with neurological disorders, although the underlying mechanism has been unclear. PDZD8, a Rab7 effector protein, transfers lipids between endoplasmic reticulum ...

    Abstract Dyslipidemia including the accumulation of cholesteryl esters (CEs) in the brain is associated with neurological disorders, although the underlying mechanism has been unclear. PDZD8, a Rab7 effector protein, transfers lipids between endoplasmic reticulum (ER) and Rab7-positive organelles and thereby promotes endolysosome maturation and contributes to the maintenance of neuronal integrity. Here we show that CEs accumulate in the brain of PDZD8-deficient mice as a result of impaired lipophagy. This CE accumulation was not affected by diet, implicating a defect in intracellular lipid metabolism. Whereas cholesterol synthesis appeared normal, degradation of lipid droplets (LDs) was defective, in the brain of PDZD8-deficient mice. PDZD8 may mediate the exchange of cholesterol and phosphatidylserine between ER and Rab7-positive organelles to promote the fusion of CE-containing LDs with lysosomes for their degradation. Our results thus suggest that PDZD8 promotes clearance of CEs from the brain by lipophagy, with this role of PDZD8 likely contributing to brain function.
    Language English
    Publishing date 2022-11-16
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2022.105612
    Database MEDical Literature Analysis and Retrieval System OnLINE

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