著者

Tadashi Maeda Katsuhito Kashiwagi Sadako Yoshizawa Takahiro Sato Kotaro Aoki Yoshikazu Ishii Kazuhiro Tateda

出版者

National Institute of Infectious Diseases, Japanese Journal of Infectious Diseases Editorial Committee

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.74, no.6, pp.560-562, 2021-11-22 (Released:2021-11-22)

参考文献数

7

被引用文献数

4

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Most coronavirus disease 2019 (COVID-19) cases are mild or asymptomatic, and a substantial minority of patients have severe or critical diseases. There are several reports on the potential risk factors of severe disease, but few reports have reported a relationship between antibody titer and severity in Japan. Antibody-dependent enhancement affects disease progression. We evaluated the IgG responses in COVID-19 patients at our tertiary hospital. The IgG index was the measure of interest. We assigned 1.4 as the cutoff value for a positive result based on the specifications by the manufacturer and observed that patients could be categorized into two groups: the early elevation of IgG and late elevation of IgG (IgG elevated in the first 7 days ± 2 days or more than 10 days after symptom onset) groups. The former comprised early IgG responders (n = 7) and the latter comprised late IgG responders (n = 14), and they were compared. The C-reactive protein and D-dimer concentrations were significantly higher in the early IgG responders on admission (HD 0). The respiratory rate was also higher. The lymphocytes were significantly fewer on day 7 of hospitalization (HD 7). These results suggest that early production of anti-severe acute respiratory syndrome coronavirus 2 IgG may be associated with clinical indicators of severity.

著者

MASASHI UEMA KENZO YONEMITSU YOSHIKA MOMOSE YOSHIKAZU ISHII KAZUHIRO TATEDA TAKAO INOUE HIROSHI ASAKURA

出版者

The Society for Antibacterial and Antifungal Agents, Japan

雑誌

Biocontrol Science (ISSN:13424815)

巻号頁・発行日

vol.26, no.2, pp.119-125, 2021 (Released:2021-06-04)

参考文献数

19

被引用文献数

8

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There is a worldwide attempt to develop prevention strategies against SARS-CoV-2 transmission. Here we examined the effectiveness of tungsten trioxide (WO3)-based visible light-responsive photocatalyst on the inactivation of SARS-CoV-2 under different temperatures and exposure durations. The viral titer on the photocatalyst-coated glass slides decreased from 5.93 ± 0.38 logTCID50 /mL to 3.05 ±. 25 logTCID50/mL after exposure to 3,000 lux of the visible light irradiation for 6h at 20℃. On the other hand, lighting without the photocatalyst, or the photocatalyst-coat without lighting retained viral stability. Immunoblotting and electron microscopic analyses showed the reduced amounts of spike protein on the viral surface after the photocatalyst treatment. Our data suggest a possible implication of the photocatalyst on the decontamination of SARS-CoV-2 in indoor environments, thereby preventing indirect viral spread.

著者

Hideto Kameda Hitoshi Tokuda Fumikazu Sakai Takeshi Johkoh Shunsuke Mori Yuji Yoshida Noboru Takayanagi Hirofumi Taki Yoshinori Hasegawa Kazuhiro Hatta Hisashi Yamanaka Makoto Dohi Shu Hashimoto Hidehiro Yamada Shinichi Kawai Tsutomu Takeuchi Kazuhiro Tateda Hajime Goto

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.50, no.4, pp.305-313, 2011 (Released:2011-02-15)

参考文献数

25

被引用文献数

27 60

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Objective Acute-onset diffuse interstitial lung disease (AoDILD) in patients with rheumatoid arthritis (RA) has been a serious concern, especially for those under treatment with biological agents which may affect the presentation and outcome of AoDILD, including Pneumocystis pneumonia (PCP). Therefore, we conducted a retrospective, multi-center study of AoDILD in RA patients receiving biological agents. Methods Patients who developed AoDILD while receiving biological agents (infliximab, etanercept, adalimumab and tocilizumab) were enrolled in the study. Definite PCP was defined as patients who showed either P. jirovecii organisms in their respiratory samples by microscopic examination, or positive tests for both P. jirovicii DNA-PCR with respiratory samples and an elevated serum 1,3-β-D-glucan level above the cut-off value. Probable PCP was defined as either a positive test for P. jirovicii PCR or an elevated serum β-D-glucan level. Chest HRCT findings were evaluated and scored by two board-certified radiologists. Results The final diagnoses for 26 patients examined were definite PCP for 13 patients, probable PCP for 11, and methotrexate-associated pneumonitis in 2 patients. Definite and probable PCP cases were clinically indistinguishable. Generalized, diffuse ground-glass opacity (GGO) is the characteristic HRCT finding in patients with definite or probable PCP, which was different from our previous findings in RA patients, mostly without biologics, showing GGO distributed in a panlobular or multilobular manner. The clinical outcome was favorable by treatment with trimethoprim-sulfamethoxazole and glucocorticoids. Conclusion The possibility of PCP should be intensively investigated in RA patients developing AoDILD while receiving biological agents.

著者

Sadatomo Tasaka Hitoshi Tokuda Fumikazu Sakai Takeshi Fujii Kazuhiro Tateda Takeshi Johkoh Norio Ohmagari Hiromitsu Ohta Hideki Araoka Yoshimi Kikuchi Masahide Yasui Kanako Inuzuka Hajime Goto

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.49, no.4, pp.273-281, 2010 (Released:2010-02-15)

参考文献数

21

被引用文献数

24 63

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Background The clinical features of pneumocystis pneumonia (PCP) differ according to the predisposing factors responsible for immunosuppression. Although PCP in patients with acquired immunodeficiency syndrome (AIDS) has been extensively described, its characteristics in non-AIDS patients, such as those with malignancies, are not thoroughly documented. Study objective To characterize and compare the clinical and imaging features of PCP in patients with malignancies with those in AIDS patients. Design A multi-center retrospective study. Patients and Measurements We evaluated the clinical and radiological features of PCP in 21 patients with malignancies and in 17 with AIDS. Clinical presentation, serum markers, oxygenation, CT findings, and outcome were examined. Results The patients with malignancies showed shorter durations of symptoms before PCP was diagnosed. The levels of serum markers and the oxygenation index did not differ. CT showed diffuse or widespread ground-glass opacity (GGO) in all of the patients evaluated. None of the AIDS patients demonstrated consolidation, whereas half of the patients with malignancy showed consolidation along with GGO. The extent of GGO scored on CT images was significantly greater in the AIDS patients. No correlation was observed between the CT findings and other clinical parameters. All of the AIDS patients recovered from PCP, whereas six patients with malignancies died within a month after the onset of PCP. Conclusion The characteristics of the CT images differed between the patient groups with different underlying disorders, although it remains to be determined whether CT findings are associated with other clinical features or are predictive of the outcome of PCP.