著者

Ichiro Furukawa Tomoe Ishihara Hiroshi Teranishi Shioko Saito Jun Yatsuyanagi Eriko Wada Yuko Kumagai Shiho Takahashi Takayuki Konno Hiroko Kashio Akihiko Kobayashi Naoki Kato Ken-ichi Hayashi Keisuke Fukushima Kazuhiko Ishikawa Kazumi Horikawa Akira Oishi Hidemasa Izumiya Takahiro Ohnishi Yoshiko Konishi Toshiro Kuroki

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2016.164, (Released:2016-08-31)

参考文献数

31

被引用文献数

24

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This study was undertaken to determine the prevalence, antimicrobial susceptibility, and genetic relatedness of Salmonella enterica subsp. enterica and Campylobacter spp. in poultry meat, and to analyze the association of genetic types of these bacteria with their geographical distribution and antimicrobial resistance profiles. Fifty-four and 71 of 100 samples were found to be contaminated with Salmonella and Campylobacter, respectively. Nine Salmonella serotypes were found, including S. enterica subsp. enterica serovar Infantis (33%), Schwarzengrund (12%), Manhattan (9%), and others. Campylobacter jejuni and C. coli were detected from 64 (64%) and 14 (14%) samples, respectively. S. enterica subsp. enterica exhibited a high frequency of resistance against tetracycline (78.3%) and streptomycin (68.3%). C. jejuni and C. coli isolates were resistant to sulfamethoxazole/trimethoprim (90.5%), nalidixic acid (47.3%), ampicillin (45.9%), and ciprofloxacin (40.5%). Cluster analysis was performed for the Salmonella isolates using PFGE and for the Campylobacter isolates with PFGE as well as comparative genomic fingerprinting. which were combined with the drug-resistance data to analyze with respect to the locations in which the poultry meat was produced. This analysis revealed that C. jejuni strains with a particular genotype and antimicrobial resistance profile are spreading in specific areas in Japan.

著者

Hiroshi Yoshikura

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2014.039, (Released:2014-11-25)

参考文献数

12

被引用文献数

3 8

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This article reviews Japanese HIV/AIDS surveillance data from 1985 to 2011. It revealed that heterosexual males are more prone to be detected as “AIDS case”, while male homosexuals and females are detected more as “HIV case” irrespectively of sex, age, infection route, residential area and nationality; and probability of detection as “AIDS case” increased with advance of age irrespective of sex and infection route. Interpretation of the data requires further information on clinical latency of AIDS that could be different depending on the infection routes, different sex, and different ages; nature of the acute phase syndrome; and factors that enhance it, such as, route and dose of infection; and mucosal immunity involved in sexually transmitted HIV/AIDS infection and influence of aging and sex on it.

著者

Seiya Harada Eisuke Tokuoka Naoko Kiyota Kazuhiko Katayama Tomoichiro Oka

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.66, no.5, pp.454-457, 2013 (Released:2013-09-19)

参考文献数

13

被引用文献数

1 19

著者

Bing-jie Zheng Yue-ping Yin Zhi Xiang Yan Han Mei-qin Shi Ning Jiang Rui-xing Yu Xiang-sheng Chen

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.67, no.1, pp.17-21, 2014 (Released:2014-01-22)

参考文献数

30

被引用文献数

1 6

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The objective of this study was to determine the prevalence of urethral Mycoplasma genitalium infections among male patients attending a sexually transmitted disease (STD) clinic in China and identify risk factors associated with this disease. A total of 423 patients were recruited in Hezhou City, Guangxi Province, China, and each was requested to complete a questionnaire regarding sociological and sexual behaviors. First-void urine samples were collected for M. genitalium analysis by polymerase chain reaction. Of the 406 urine samples collected, 114 were M. genitalium-positive, giving a prevalence rate of 28.1%. Univariate logistic regression analysis showed that M. genitalium infection was associated with younger age, having received at least senior high school education, and single marital status. In both univariate and multivariate logistic regression analyses, M. genitalium infection was found to be associated with lack of symptoms for STD in the past year (adjusted odds ratio [AOR] = 2.839; 95% CI = 1.495–5.392; P = 0.001), no use of condoms with steady partners in the past year (AOR = 2.830; 95% CI = 1.468–5.455; P = 0.002), and having sexual encounters with female sexual workers within the past 3 months (AOR = 2.955; 95% CI = 1.637–5.336; P < 0.0003). The observed high rate of M. genitalium infection among male STD patients in Hezhou City indicates an M. genitalium epidemic in the study population; thus, the national surveillance program and clinical health providers in China should more closely monitor this disease.

著者

Nakhon Asdamongkol Pariya Phanachet Somnuek Sungkanuparph

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.66, no.6, pp.469-474, 2013 (Released:2013-11-22)

参考文献数

36

被引用文献数

2 25

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Immunological discordance in HIV-infected patients is associated with a higher risk of mortality and disease progression. Zinc is an essential micronutrient for immune function. A two-phase pilot study including a cross-sectional study to determine plasma zinc levels and a prospective, randomized, placebo-controlled trial to determine immunological responses after zinc supplementation was conducted in HIV-infected patients with immunological discordance in a medical school hospital. Immunological discordance was defined in patients who received antiretroviral therapy, had HIV RNA < 40 copies/mL, and a CD4+ cell count < 200 cells/mm3 that increased <30% from baseline after receiving ART with undetectable HIV RNA for 12 months. Of 31 patients, 12 (39%) had low plasma zinc levels (<75 μg/dL). Five of 12 patients with low plasma zinc levels and 8 of 19 patients with normal plasma zinc levels were randomized to receive zinc supplementation. The median changes in plasma zinc levels after supplementation versus placebo in patients with low plasma zinc levels were 29 versus 4.5 μg/dL, respectively. The CD4+ cell count significantly increased (176 versus 250 cells/mm3, P = 0.042) after zinc supplementation in patients with low plasma zinc levels. Further large-scale studies to determine long-term benefits of zinc supplementation in patients with immunological discordance are required.

著者

Bishnu Raj Tiwari Surendra Karki Prakash Ghimire Bimala Sharma Sarala Malla

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.66, no.3, pp.252-255, 2013 (Released:2013-05-23)

参考文献数

8

被引用文献数

1 1

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Highly active anti-retroviral therapy (HAART) has been freely available in Nepal since 2004. In the present longitudinal study, we followed two distinct cohorts of human immunodeficiency virus-infected participants, those receiving HAART and those under assessment of eligibility for HAART, during the period 2005–2007 in Kathmandu, Nepal. The median change in CD4+ T-cell count among participants receiving HAART after 12 months of the initiation of therapy was +118 T cells/μl (95% confidence interval [CI], +91 to +145 T cells/μl) and that among participants under assessment of eligibility for HAART was −74 T cells/μl (95% CI, −103 to −44 cells/μl). However, the median CD8+ T-cell count after 12 months remained stable in both the cohorts (P > 0.05). The CD4+/CD8+ T-cell ratio increased from 0.16 to 0.26 after 12 months of therapy (P < 0.001). The multivariate regression model revealed that participants >30 years of age, and injection drug users had significantly lower increases in the CD4+ T-cell count in response to therapy. We observed a high proportion of loss to follow-up after 12 months of therapy; however, the associated factors were unknown. In conclusion, we observed a significant improvement in the CD4+ T-cell count in participants receiving HAART; however, the CD4+/CD8+ T-cell ratio remained <0.5 after 12 months of treatment.

著者

Ken Kikuchi Rei Miyauchi Tomoya Yamaguchi Hayato Sugiura Taishi Nogami Yuki Inoue Haruna Sato Hideki Sato Nagatoshi Fujiwara Shinji Maeda

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2023.270, (Released:2023-10-31)

参考文献数

17

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Using anticancer drugs as an example, we examined the possibility of reusing residual drugs. The use of residual drugs is not widespread because of concerns regarding bacterial contamination. We mixed anticancer drugs with bacteria and investigated their effects on bacterial growth. The anticancer drugs carboplatin, paclitaxel, etoposide, irinotecan, methotrexate, and 5-fluorouracil (5-FU) were mixed with Staphylococcus aureus, Enterococcus faecalis, Serratia marcescens, and Escherichia coli. After a certain period, the number of bacteria was counted. Irinotecan showed no antibacterial activity, whereas 5-FU showed high antibacterial activity against the bacteria tested. The 5-FU also showed a minimum inhibitory concentration value in the range of 8–80 μg/mL, depending on the bacterial species. The 5-FU dose-dependently inhibited S. aureus growth at more than 0.8 µg/mL. Since protein synthesis systems are reportedly antibiotic targets, we used a cell-free protein synthesis system to confirm the mechanism of the anticancer agent’s antibacterial activity. The 5-FU and methotrexate had direct inhibitory effects on protein synthesis. It is suggested that even if the residual drugs are contaminated with bacteria, there will be no microbial growth or microbes will be killed by the drug. With careful monitoring, the 5-FU could potentially be used for antimicrobial purposes.

著者

Ya-Ping Li Jie-Wen Cai Li-Juan Liao Han Ding Xun-Jie Cao Guo-Dong Zhu Xu-Guang Guo

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.75, no.3, pp.302-308, 2022-05-31 (Released:2022-05-24)

参考文献数

22

被引用文献数

1 4

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Based on previous studies, we found that Bacillus Calmette–Guérin (BCG) vaccination may play a role in preventing SARS-CoV-2 infection. Therefore, we conducted a meta-analysis to investigate this protective effect. We searched the Embase, PubMed, Web of Science, Cochrane Library, BioRxiv, and MedRxiv databases for studies that evaluated the relationship between BCG vaccination and SARS-CoV-2 infection or COVID-19 disease. The quality of all included studies was assessed using the Risk of Bias in Non-randomized Studies of Interventions and the Agency for Healthcare Research and Quality data tools. Review Manager (Version 5.3) was used to conduct all the data analyses. A total of eight studies were ultimately included in our meta-analysis. Our primary analysis found a significantly lower SARS-CoV-2 infection rate in the BCG vaccination group compared to the control group, with an odds ratio of 0.61, (95% confidence interval 0.39 to 0.95, P = 0.03; I2 = 31%, and P = 0.21, respectively). Our study indicates that BCG vaccination can protect against SARS-CoV-2 infection. However, there is insufficient evidence that BCG vaccination can reduce the severity of COVID-19.

著者

Yusuke Ainoda Nozomi Takeshita Ryota Hase Takahiro Mikawa Naoto Hosokawa Ichiro Kawamura Hanako Kurai Masahiro Abe Muneyoshi Kimura Hideki Araoka Takahiro Fujita Kyoichi Totsuka Kazuhisa Mezaki Noritaka Sekiya Norio Ohmagari

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.70, no.4, pp.405-407, 2017 (Released:2017-07-24)

参考文献数

17

被引用文献数

7 7

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Staphylococcus lugdunensis (SL) is a bacterium with a highly pathogenicity than most other coagulase-negative Staphylococcus spp. (CoNS). In Japan, data on this pathogen are sparse, and the current prevalence of SL bacteremia is unknown. Therefore, we investigated the prevalence of SL in blood culture specimens in a prospective multicenter study across 5 facilities. A total of 3,284 patients had positive blood cultures, and 2,478 patients had bacteremia. Among the patients with bacteremia, 7 patients (0.28%) had SL bacteremia. A total of 281 patients had CoNS bacteremia, with SL accounting for 2.49% of these cases. Of the 7 patients with SL bacteremia, 1 patient (14.3%) had infective endocarditis, and 1 patient (14.3%) died within 30 days. In this study, SL resulted in the development of bacteremia in select patients. Clinicians in Japan should be aware of the prevalence of SL and the complications of SL bacteremia.

著者

Akio Yamada Kohei Makita Hazumu Kadowaki Naoto Ito Makoto Sugiyama Nigel C.L. Kwan Katsuaki Sugiura

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.72, no.4, pp.203-210, 2019 (Released:2019-07-24)

参考文献数

58

被引用文献数

7 10

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Although rabies still kills many people, the global eradication of human rabies is considered to be feasible. Progress towards eradication may differ among regions with differing socio-economic statuses; therefore, states that successfully eradicate this disease must be vigilant for rabies re-emergence. Here, we discuss challenges that remain concerning current rabies prevention measures and risk assessment results concerning possible rabies introduction and spread in rabies-free Japan. We summarize the preventative measures undertaken by representative rabies-free countries and regions. Our risk assessment results show that the risk of rabies reintroduction under current circumstances is very low, and that subsequent spread of the disease would be minimal because of quite low value of basic reproduction number. Similar assessments conducted in other rabies-free areas also showed limited risks of introduction. The majority of rabies-free countries maintain their rabies-free status through strict import quarantine of carnivorous animals, efficient surveillance of animal rabies including wildlife, quick emergency responses, and raising public awareness of the disease. To maintain the current rabies-free status in Japan, we strongly recommend maintaining the current quarantine system and reinforcing stakeholder compliance for those involved in international movement of dogs. Moreover, sustainable surveillance systems targeting wildlife are indispensable.

著者

Taito Kitano

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.75, no.2, pp.114-120, 2022-03-31 (Released:2022-03-24)

参考文献数

40

被引用文献数

1

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Japan recently approved a quadrivalent human papillomavirus (HPV) vaccine for males, but the 9-valent vaccine has only been approved for females. Given the low female vaccination rate due to concerns about adverse events in Japan, quantifying the risks and benefits of the HPV vaccination for males may help in deciding whether to vaccinate adolescent boys in Japan. Using quality-adjusted life years, the risk–benefit ratio for an adolescent boy receiving the 9-valent HPV vaccination was calculated. The male HPV vaccination reduced the QALYs gained due to head and neck cancer, anal cancer, penile cancer, genital warts, and recurrent respiratory papillomatosis by 401.63, 20.38, 9.40, 28.79, and 69.13 per 100,000 vaccinated persons, respectively. The total risk of vaccination was 11.85. The risk–benefit ratio for a 12-year-old boy who received the HPV vaccination series was found to be 0.022 (benefit–risk ratio, 44.670). In the sensitivity analysis, the risk–benefit ratio ranged from 0.0001 to 0.11 for all scenarios. Hence, much larger benefits than risks linked with the male HPV vaccination were observed from an individual perspective. The results support the inclusion of sex-neutral HPV vaccinations into the national immunization program as well as strengthens the decision for adolescent boys to receive the vaccination.

著者

Hideki Tani Noriko Inasaki Shunsuke Yazawa Takahisa Shimada Yumiko Saga Hiroyasu Kaya Yumiko Maruyama Sadaya Matano Hiroyuki Itoh Tatsuhiko Kashii Emiko Yamazaki Masae Itamochi Kazunori Oishi

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2023.100, (Released:2023-05-31)

参考文献数

12

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Breakthrough infection (BI) after coronavirus disease 2019 (COVID-19) vaccination has exploded owing to the emergence of various SARS-CoV-2 variants and has become a major problem at present. In this study, we analyzed the epidemiological information and possession status of neutralizing antibodies in patients with BI using SARS-CoV-2 pseudotyped viruses (SARS-CoV-2pv). Analysis of 44 specimens diagnosed with COVID-19 after two or more vaccinations showed high inhibition of infection by 90% or more against the Wuhan strain and the Alpha and Delta variants of pseudotyped viruses in 40 specimens. In contrast, almost no neutralizing activity was observed against the Omicron BA.1 variant. Many cases without neutralizing activity or BI were immunosuppressed individuals. The results of this study show that contact with an infected person can result in BI even when there are sufficient neutralizing antibodies in the blood. Thus, even after vaccination, sufficient precautions must be taken to prevent infection.

著者

Meliha Cagla Sonmezer Taha Koray Sahin Enes Erul Gulcin Telli Dizman Ahmet Cagkan Inkaya Alparslan Alp Sehnaz Alp Serhat Unal

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.76, no.1, pp.27-33, 2023-01-31 (Released:2023-01-24)

参考文献数

40

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Common Human Coronaviruses (HCoVs), such as NL63, HKU1, 229E, and OC43, induce respiratory tract infections worldwide. Epidemiological studies of HCoVs are of paramount importance because the disease burden and trajectory (in years) have not been well addressed in adults. Here, we aimed to describe the burden of HCoVs in a hospital setting over five years before the coronavirus disease 2019 pandemic. This was a retrospective study of patients (>18 years) between January 1, 2015, and January 1, 2020, whose respiratory specimens were tested by multiplex real-time polymerase chain reaction. In total, 7,861 respiratory samples (4,540 patients) were included, 38% of which tested positive for any respiratory virus. Of these, 212 (12.2%) samples were positive for HCoVs, and their co-infection with other respiratory viruses was 30.6%. Rhinovirus (27.6%) was the most common co-infection among all three HCoVs. The overall prevalence of HCoVs tended to be the highest in the winter (40.9%). Patients aged ≥60 years had the highest prevalence of overall HCoVs (39.7%). Given the duration and large sample size, this study from Turkey is one of the largest to date among adults in the literature. These epidemiological data and molecular surveillance of HCoVs have important implications for the control and prevention of respiratory infections.

著者

Keisuke Nonaka Yoko Matsuda Mototsune Kakizaki Shoichiro Takakuma Akihiko Hamamatsu Yasuhiro Sakashita Tomoyasu Matsubara Shigeo Murayama Toshiyuki Ishiwata Noriko Yamanaka Mitsuyo Itabashi Takashi Takei Noriko Nakajima Hideki Hasegawa Tomio Arai

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.72, no.5, pp.347-349, 2019 (Released:2019-09-19)

参考文献数

10

被引用文献数

7 7

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An 84-year-old man with chronic renal failure, anemia, and diabetes was admitted for hemodialysis initiation. His vital signs were stable until the eighteenth hospital day, before acquiring an influenza A virus infection. Three days later, he died of septic shock with severe liver impairment. His leukocyte count, prothrombin time (PT-INR), and liver enzyme levels such as aspartate transaminase and alanine aminotransferase, were significantly increased. Hypercytokinemia was also observed. Autopsy revealed bilateral diffuse pneumonia with neutrophil infiltration. The liver showed extensive centrilobular hepatocyte necrosis. Immunohistochemistry for influenza A nucleoprotein revealed positivity in the ciliated columnar epithelium of the bronchi and negativity in the trachea, lungs, and liver. Hypoxic hepatitis is characterized by an abrupt and massive increase in aminotransferase levels (> 20 times upper normal limit) due to anoxic centrilobular hepatocyte necrosis. The occurrence of hypoxic hepatitis requires a pre-existing, chronic condition, such as anemia, causing reduced oxygen supply to the liver, followed by an acute decrease in hepatic oxygen supply, such as septic shock. Therefore, this report suggests that hypoxic hepatitis can be an important causative factor for acute liver failure associated with influenza virus infection.

著者

Koichi Tanimoto Takahiro Nomura Yusuke Hashimoto Hidetada Hirakawa Haruo Watanabe Haruyoshi Tomita

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.74, no.1, pp.79-81, 2021-01-29 (Released:2021-01-22)

参考文献数

13

被引用文献数

6 6

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Five novel strains of Serratia fonticola that produce FONA, a minor extended-spectrum beta-lactamase (ESBL), were isolated during routine surveillance of ESBL-producing Enterobacteriaceae in imported chicken meat in Japan in 2017 and 2018. These strains exhibited a clear ESBL phenotype in susceptibility tests carried out in the presence of clavulanic acid; however, all strains tested negative in a multiplex polymerase chain reaction assay used to detect TEM, SHV, and CTX-M β-lactamase genes. After identification of the bacterial species as S. fonticola, full length blaFONA genes were amplified and the DNA sequences were determined. The blaFONA genes from all 5 strains were different from those previously reported (blaFONA-1 to blaFONA-6); they clustered close to one another but were distinct from previously reported blaFONA genes in a phylogenic analysis based on amino acid sequences.

著者

Youta Takano Makiko Shibano Yuuya Takizawa Eriko Arai Shinobu Koyama Takahiro Shimizu Takehisa Matsumoto

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.76, no.2, pp.159-161, 2023-03-31 (Released:2023-03-24)

参考文献数

11

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Klebsiella oxytoca is an opportunistic pathogen that causes nosocomial infections. Here, we describe an unusual clinical strain of indole-negative K. oxytoca, GU175, isolated from the urine of a patient with cystitis. The GU175 strain was identified as K. pneumoniae with a probability of 99.40%, negative for indole production, and resistant to third-generation cephalosporins by using the MicroScan Walkaway 40 SI system with the Negative combo EN1 J panel. Biochemical characterization of this strain using lysine-indole motility medium was negative for indole production. However, identification tests using the MALDI Biotyper system and 16S rRNA gene sequence analysis revealed that GU175 is K. oxytoca. DNA sequence analysis of the tryptophanase operon comparing the GU175 strain with the revertant GU176 strain, which tested positive for indole, revealed a point mutation in the Shine-Dalgarno sequence upstream of tnaC in the GU175 strain. This is the first report of indole-negative K. oxytoca, which was attributed to a mutation in the DNA sequence of the tryptophanase operon isolated from a patient with a urinary tract infection. As indole-negative K. oxytoca can be misidentified as K. pneumoniae by biochemical characterization, clinical microbiologists should be aware of such misidentifications.

著者

Osamu Matsuoka Mugen Ujiie Hitoshi Kikuchi Sachiko Otake Danaya Chansinghakul Takahiro Inoue Kucku Varghese Nuchra Sirisuphmitr Tomoyuki Hashiguchi Betzana Zambrano Takahiro Nakama Carina Frago Emilia Jordanov Mandeep Singh Dhingra

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2022.272, (Released:2023-01-31)

参考文献数

33

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MenACYW-TT is a quadrivalent meningococcal tetanus toxoid-conjugate vaccine designed to prevent invasive meningococcal disease. The primary objective of this study was to demonstrate non-inferiority of the vaccine seroresponse to a single dose of MenACYW-TT compared to a licensed Meningococcal quadrivalent diphtheria-conjugate vaccine, MCV4-DT. This Phase III double-blind, multi-center study was conducted in meningococcal vaccine-naive participants aged 2-55 years in Japan (NCT04368429; JapicCTI-205288). Participants were randomized 1:1 to MenACYW-TT (n=180) or MCV4-DT (n=180). Functional antibodies against meningococcal serogroups A, C, W, and Y were measured using a serum bactericidal antibody assay with human complement (hSBA) at baseline (D0) and 30 days after vaccination (D30). Seroresponse was defined as post-vaccination titers ≥1:16 for participants with baseline titers <1:8; or ≥4-fold increase for participants with baseline titers ≥1:8. Safety data were collected for 30 days. Non-inferiority of the vaccine seroresponse vs MCV4-DT was demonstrated at D30 for each serogroup (A: 85.6% vs. 65.4%; C: 96.6% vs. 62.6%; W: 87.4% vs. 49.2%; Y: 97.7% vs. 63.5%, respectively). MenACYW-TT was well-tolerated, with no safety concerns identified. In conclusion, when administered as a single dose, MenACYW-TT was well tolerated with a non-inferior immune response compared to MCV4-DT, providing a potential alternative vaccine for this population.

著者

Hitoshi Oshitani The Expert Members of The National COVID-19 Cluster Taskforce at The Ministry of Health Labour and Welfare Japan

出版者

National Institute of Infectious Diseases

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.73, no.6, pp.491-493, 2020-11-30 (Released:2020-11-24)

参考文献数

10

被引用文献数

29 54

著者

Takayuki Hishiki Kengo Usui Tadaichi An Rieko Suzuki Jun-ichi Sakuragi Yuki Tanaka Yu Matsuki Jun Kawai Yasushi Kogo Yoshihide Hayashizaki Tomohiko Takasaki

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

pp.JJID.2021.292, (Released:2021-10-29)

参考文献数

21

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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, China, in December 2019. Despite the recent introduction of vaccines against SARS-CoV-2, more effective vaccines and antiviral drugs must be developed. Here, we isolated five SARS-CoV-2 strains from four patients with coronavirus disease (COVID-19) and an asymptomatic individual using pharyngeal swabs, nasopharyngeal swabs, and sputum samples. Cytopathic effects in inoculated Vero cells were observed between days 3 and 7. SARS-CoV-2 infection was confirmed by quantitative reverse-transcription polymerase chain reaction (RT-qPCR) and next-generation sequencing. Phylogenetic analyses of the whole genome sequences showed that the virus isolates from the clinical samples were belonged to the Wuhan and European lineages. These findings and isolated viruses may contribute to the development of diagnostic tools, vaccines, and antiviral drugs for COVID-19.

著者

Katsumi Mizuta Waka Tanaka Kenichi Komabayashi Shizuka Tanaka Junji Seto Yoko Aoki Tatsuya Ikeda

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.72, no.4, pp.211-223, 2019 (Released:2019-07-24)

参考文献数

102

被引用文献数

12 10

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We introduced a microplate method for virus isolation in the Department of Microbiology, Yamagata Prefectural Institute of Public Health (YPIPH) in 1999 in Yamagata, Japan. We have since carried out longitudinal epidemiological studies on viral infectious diseases, particularly respiratory viruses, combining traditional technologies such as virus isolation and serological techniques and newly developed molecular methods. Here, we provide an overview of our activities at YPIPH between 1999 and 2018. During the study period, we observed emerging and re-merging diseases such as those caused by echovirus type 13, enterovirus D68, parechovirus-A3 (PeV-A3), and Saffold virus. With regard to PeV-A3, we proposed a new disease concept, “PeV-A3-associated myalgia/myositis.” We also revealed the longitudinal epidemiologies of several viruses such as enterovirus A71 and coxsackievirus A16. To perform longitudinal epidemiological studies at any time in Yamagata, we established a system for stocking clinical specimens, viral isolates, complementary DNAs, and serum specimens. We have also pursued collaboration works with virology laboratories across Japan. We hope our experiences, findings, and research materials will further contribute to the development of countermeasures against viral infectious diseases and improvement in public health strategies in Yamagata, Japan, Asia, and around the world.