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フィリピンにおいては感染症が保健衛生分野の最大の問題であるにもかかわらず、その実態が把握されていないという現実があります。本拠点で得られた成果は、今後フィリピンが持続可能な感染症対策を確立するのに大きく貢献するものと期待されます。さらに、これらの成果は国際機関等を通して他の途上国へも応用可能なものです。また、本拠点では若手研究者に研究プロジェクトの中心的な役割を担わせており、彼らが将来、世界の感染症対策のリーダーとなることが期待されます。
Research Institute for Tropical Medicine (RITM)
Research Institute for Tropical Medicine (熱帯医学研究所)は、1979年日本国政府とフィリピン国政府の間で熱帯医学研究所の設立に関する合意書が交わされた後、1981年JICAによって設立されました。当初研究棟と50床の病棟が建てられ、後に動物研究施設(1984年)、熱帯感染症研究のトレーニングセンター(1989年)、さらに2002年にはNational
Tuberculosis Reference Laboratoryも加わり、国内の医療従事者に対するトレーニングやワークショップなどを開催できるキャパシティーができました。
スタッフ
東北大学スタッフフィリピン拠点(駐在)
中川惠美子
日本(東北大学)スタッフ
押谷仁・斉藤繭子・岡本道子・齊藤(小畑)麻理子・今村剛朗・佐山勇輔
RITMスタッフ
Joanne de Jesus-Cornejo・Lea Apostol・Lei Lanna Dencel・Joseph Bonifacio・Johanna
Sornillo

Project 1: フィリピン拠点における感染症研究の推進と呼吸器ウイルスの遺伝子解析
Project 2: コミュニティにおけるRSウイルスを主とした呼吸器ウイルスの流行動態モデル
Project 3: 下痢症発症リスク予測と病原体モニタリングのための出生コホート研究
Project 4: 新型コロナウイルスの疫学調査と遺伝子解析

【2023(R5)年度】
- Malaga JL, Pajuelo MJ, Okamoto M, Tsinda EK, Otani K, Tsukayama P, Mascaro L, Cuicapuza D, Katsumi M, Kawamura K, Nishimura H, Sakagami A, Ueki Y, Omiya S, Okamoto S, Nakayama A, Fujimaki SI, Yu C, Azam S, Kodama E, Dapat C, Oshitani H, Saito M. Rapid Detection of SARS-CoV-2 RNA Using Reverse Transcription Recombinase Polymerase Amplification (RT-RPA) with Lateral Flow for N-Protein Gene and Variant-Specific Deletion-Insertion Mutation in S-Protein Gene. Viruses. 2023 May 26;15(6):1254. doi: 10.3390/v15061254.
- Foronda JLM, Jiao MMAD, Climacosa FMM, Oshitani H, Apostol LNG.Epidemiological and molecular characterization of Coxsackievirus A6 causing hand, foot, and mouth disease in the Philippines, 2012-2017.Infect Genet Evol. 2023 Oct;114:105498. doi: 10.1016/j.meegid.2023.105498.
- Sayama Y, Okamoto M, Saito M, Tamaki R, Saito-Obata M, Quicho RFN, Joboco
CD, Lupisan S, Oshitani H. Lack of zoonotic coronavirus species detected
among children hospitalized with pneumonia in the Philippines. Clin Infect
Dis. 2023 Nov 30;77(11):1612-1613. doi: 10.1093/cid/ciad430.
【2022(R4)年度】
- Calzado C, Foronda JL, Arguelles VL, Daga CM, Quimpo MT, Lupisan S, Dapat
C, Saito M, Okamoto M, Albano PM, Oshitani H. Serotype Identification of
Human Adenoviruses Associated with Influenza-Like Illnesses in the Philippines
from 2006 to 2012 by Microneutralization and Molecular Techniques. Int
J Infect Dis. 2022 Apr;117:326-333. doi: 10.1016/j.ijid.2022.02.008.
- Aure WE, Sayama Y, Saito-Obata M, Salazar NP, Malbas FF Jr, Galang HO, Imamura T, Zuasula CL, Oshitani H. Japanese encephalitis virus genotype III from mosquitoes in Tarlac, Philippines. IJID Reg. 2022 May 16;4:59-65. doi:10.1016/j.ijregi.2022.05.005.
- Sayama A, Okamoto M, Tamaki R, Saito-Obata M, Saito M, Kamigaki T, Sayama
Y, Lirio I, Manalo JI, Tallo VL, Lupisan SP, Oshitani H. Comparison of
Rhinovirus A?, B?, and C?Associated Respiratory Tract Illness Severity
Based on the 5′-Untranslated Region Among Children Younger Than 5 Years.
Open Forum Infect Dis. 2022 Oct 19;9(10):ofac387. doi: 10.1093/ofid/ofac387.
- Sayama Y, Okamoto M, Saito M, Saito-Obata M, Tamaki R, Joboco CD, Lupisan
S, Oshitani H. Seroprevalence of four endemic human coronaviruses and,
reactivity and neutralization capability against SARS-CoV-2 among children
in the Philippines.Sci Rep. 2023 Feb 9;13(1):2310. doi: 10.1038/s41598-023-29072-3.
【2021(R3)年度】
- Zhu Y, Oishi W, Maruo C, Saito M, Chen R, Kitajima M, Sano D.Early warning of COVID-19 via wastewater-based epidemiology: potential and bottlenecks. Sci Total Environ. 2021 May 1;767:145124. doi: 10.1016/j.scitotenv.2021.145124.
- Dapat C, Kumaki S, Sakurai H, Nishimura H, Labayo HKM, Okamoto M, Saito
M, Oshitani H. Gene signature of children with severe respiratory syncytial
virus infection. Pediatr Res. 2021 May;89(7):1664-1672. doi: 10.1038/s41390-020-01347-9.
- Otomaru H, Sornillo JB, Kamigaki T, Bado SL, Okamoto M, Saito-Obata M,
Inobaya M, Segubre-Mercado E, Alday P, Saito M, Tallo V, Quiambao B, Oshitani
H, Cook A. Risk of Transmission and Viral Shedding from the Time of Infection
for Respiratory Syncytial Virus in Households. Am J Epidemiol. 2021 Jul
3;kwab181. doi: 10.1093/aje/kwab181.
- 大石若菜、Zhu Yifan、丸尾知佳子、斉藤繭子、北島正章、佐野大輔. ウイルス感染症流行制御のための下水疫学調査のエッセンス. 水環境学会誌. 2021, 44(5), 125-133.
- Zhu Y, Oishi W, Saito M, Kitajima M, Sano D. Early Warning of COVID-19
in Tokyo via Wastewater-based Epidemiology: How Feasible It Really Is?
J Water and Environ Tech. 2021; 19 (3): 170-183. doi : 10.2965/jwet.21-024.
- Okamoto M, Sakamoto M, Dapat C, Saito M, Saito-Obata M, Tamaki R, Lupisan
SP, Quiambao BP, Oshitani H. Complete Genome Sequences of Enterovirus D68
Clade A and D Strains in the Philippines. Microbiol Resour Announc. 2021
Sep 30;10(39):e0070921. doi: 10.1128/MRA.00709-21.
- Bugayong MP, Izumiya H, Bilar JM, Morita M, Arakawa E, Saito-Obata M, Oshitani H, Ohnishi M. Molecular characterization of Vibrio cholerae O1 isolates obtained from outbreaks in the Philippines, 2015-2016. J Med Microbiol. 2021 Nov;70(11). doi: 10.1099/jmm.0.001443.
- Fujita D, Dapat C, Kagning Tsinda E, Saito M, Okamoto M, Saito-Obata M,
Quiambao BP, Lupisan SP, Oshitani H. Near-Complete Genome Sequencing of
Influenza C Virus in the Philippines between 2014 and 2019. Microbiol Resour
Announc. 2021 Dec 9;10(49):e0090021. doi: 10.1128/MRA.00900-21.
- Calzado C, Foronda JL, Arguelles VL, Daga CM, Quimpo MT, Lupisan S, Dapat
C, Saito M, Okamoto M, Albano PM, Oshitani H. Serotype Identification of
Human Adenoviruses Associated with Influenza-Like Illnesses in the Philippines
from 2006 to 2012 by Microneutralization and Molecular Techniques. Int
J Infect Dis. 2022 Feb 9:S1201-9712(22)00087-X. doi: 10.1016/j.ijid.2022.02.008.
- Zhu Y, Oishi W, Maruo C, Bandara S, Lin M, Saito M, Kitajima M, Sano D. COVID-19 case predication vis wastewater surveillance in a low-prevalence urban community: a modeling approach. J Water and Health 2022, 20(2):459-470 doi: 10.2166/wh.2022.183
11.Otani K, Saito M, Okamoto M, Tamaki R, Saito-Obata M, Kamigaki T, Lirio IC, Segubre-Mercado E, Tallo V, Lupisan S, Oshitani H. Incidence of lower respiratory tract infection and associated viruses in a birth cohort in the Philippines. BMC Infect Dis. 2022 Mar 30;22(1):313. doi: 10.1186/s12879-022-07289-3.
- Otani K, Saito M, Okamoto M, Tamaki R, Saito-Obata M, Kamigaki T, Lirio
IC, Segubre-Mercado E, Tallo V, Lupisan S, Oshitani H. Incidence of lower
respiratory tract infection and associated viruses in a birth cohort in
the Philippines. BMC Infect Dis. 2022 Mar 30;22(1):313. doi: 10.1186/s12879-022-07289-3.
【2020(R2)年度】
- Kimura Y, Fujimura C, Imagawa T, Lupisan S, Saito-Obata M, Saito M, Oshitani
H, Aiba S. Development of a novel in vitro assay to evaluate environmental
water using an IL-8 reporter cell line. EXCLI J. 2020. 19: 1054?1063. doi:
10.17179/excli2020-2104.
- Sato M, Oshitani H, Tamaki R, Oyamada N, Sato K, Nadra AR, Landicho J,
Alday PP, Lupisan SP, Tallo VL. Factors affecting mothers' intentions to
visit healthcare facilities before hospitalisation of children with pneumonia
in Biliran province, Philippines: a qualitative study. BMJ Open. 2020.
26;10(8):e036261. doi: 10.1136/bmjopen-2019-036261.
- Imagawa T, Saito M, Yamamoto D, Saito-Obata M, Masago Y, Ablola AC, Tandoc
AO 3rd, Segubre-Mercado E, Lupisan SP, Oshitani H. Genetic diversity of
species A rotaviruses detected in clinical and environmental samples, including
porcine-like rotaviruses from hospitalized children in the Philippines.
Infect Genet Evol. 2020. 85:104465. doi: 10.1016/j.meegid.2020.104465.
- Furuse Y, Tamaki R, Suzuki A, Kamigaki T, Okamoto M, Saito-Obata M, Nakagawa
E, Saito M, Segubre-Mercado E, Tallo V, Lupisan S, Oshitani H. Epidemiological
and clinical characteristics of children with acute respiratory viral infections
in Philippines: a prospective cohort study. Clin Microbiol Infect. 2020.
S1198-743X(20)30569-3. doi: 10.1016/j.cmi.2020.09.017.
- Balingit JC, Carvajal TM, Saito-Obata M, Gamboa M, Nicolasora AD, Sy AK, Oshitani H, Watanabe K. Surveillance of dengue virus in individual Aedes aegypti mosquitoes collected concurrently with suspected human cases in Tarlac City, Philippines. Parasit Vectors. 2020. 13: 594. doi: 10.1186/s13071-020-04470-y.
- Nishimura H, Okamoto M, Dapat I, Katumi M, Oshitani H. Inactivation of
SARS-CoV-2 by Catechins from Green Tea. Jpn J Infect Dis. 2021. online
ahead of print. doi: 10.7883/yoken.JJID.2020.902.
- Zhu Y, Oishi W, Maruo C, Saito M, Chen R, Kitajima M, Sano D. Early warning
of COVID-19 via wastewater-based epidemiology: potential and bottlenecks.
Sci Total Environ. 2021. 1;767:145124. doi: 10.1016
- Zhu Y, Oishi W, Saito M, Kitajima M, Sano D. Early Warning of COVID-19 in Tokyo via Wastewater-based Epidemiology: How Feasible It Really Is? J Water Emviron. 19(3): 170?183, 2021. https://doi.org/10.2965/jwet.21-024
- Otomaru H, Sornillo JBT, Kamigaki T, Bado SLP, Okamoto M, Saito-Obata M,
Inobaya MT, Segubre-Mercado E, Alday PP, Saito M, Tallo VL, Quiambao BP,
Oshitani H, Cook AR. Risk of Transmission and Viral Shedding From the Time
of Infection for Respiratory Syncytial Virus in Households. Am J Epidemiol.
2021 Dec 1;190(12):2536-2543. doi: 10.1093/aje/kwab181.