RESEARCH AND EXTENSION
Ongoing Research
Principal Investigator: Dr. Ian Tabios
Co-PI: Dr. Eva Maria C. Cutiongco-de la Paz, Dr. Aloysius Domingo
Duration: 03/2022 to 12/2025
Funding Agency: DOST-PCHRD and CCXDP (USA)
X-linked Dystonia Parkinsonism (XDP) or Lubag is a debilitatingly severe neurodegenerative disease that affects males with maternal ancestry tracing back to the Panay region of the Philippines. We aim to estimate the genetic prevalence of XDP in the Philippines using randomly selected biobanked de-identified residual dried blood spots (DBS) from the Philippine Newborn Screening Program, which provides a nearly complete representation of the population. Our study will serve as reference for further research, clinical guidelines, and public health policymaking. More importantly, a similar workflow for the study of other diseases common to the Filipino population may be developed, tested, and validated in the future.
Principal Investigator: Dr. Ian Tabios
Co-Investigators: Dr. Sheriah de Paz-Silava, Dr. Ourlad Tantengco, Dr. Michelle Diwa
Duration: 10/2024 to 10/2026
Funding Agency: DOST under the VVRP
The gold standard in the diagnosis of genital HPV and HSV-2 infections is the PCR-based detection of viral nucleic acid from physician-collected genital swabs. Although highly accurate, this method involves an invasive and highly uncomfortable sample collection, which has been shown to negatively impact testing uptake. We aim to determine the diagnostic accuracy of molecular testing using self-collected specimens compared to the use of physician-collected genital swabs as reference standard. This project will provide a simplified testing workflow for HPV and HSV-2 that can be easily deployed in public health surveys, even in geographically isolated and disadvantaged areas (GIDA) where access to physicians and cold chain support are limited.
Demonstration of water conservancy combined with schistosomiasis control
Principal Investigator: Dr. Ian Tabios
Co-Investigators: Raffy Fornillos, Dr. Ian Kendrich Fontanilla, Dr. Lydia Leonardo
Duration: 04/2024 to 12/2025
Funding Agency: Asian Cooperation Fund (China)
Irrigation canals in schistosomiasis endemic areas can habor the snail intermediate host. This is a potential source of contaminated water that can infect nearby farming communities. We aim to demonstrate the short-term impact of water conservancy projects to the distribution of snails. This project will provide evidence on the potential impact of water conservancy projects to disease transmission.
Morphological and molecular characterization of zoonotic trematodes isolated from snail intermediate hosts in the Philippines
Principal Investigator: Dr. Ian Tabios
Co-Investigators: Raffy Fornillos, Dr. Aleyla de Cadiz
Duration: 06/2023 to 04/2025
Funding Agency: OVCRD
Zoonotic trematodiases (schistosomiasis, heterophydiasis, fascioliasis, paragonimiasis) are among the most prevalent parasitisms in the Philippines, with the highest disease burden in underserved rural communities in Southern Philippines. They have complex life cycles involving one or two freshwater intermediate hosts, which are necessary in the perpetuation of disease transmission. This study aims to characterize the trematodes isolated from freshwater snails in selected trematodiases-endemic villages using morphological and molecular tools. The study will provide baseline data about the presence and diversity of zoonotic trematodes in snail intermediate hosts, which will be a significant contributing evidence on the emerging threat of trematodiases in certain parts of the Philippines, and hopefully ignite future studies on the field.
Identification of high-risk areas for Taenia solium active transmission in the Philippines
Principal Investigator: Dr. Ian Fontanilla
Co-Investigators: Dr. Ian Tabios, Raffy Fornillos, Dr. Lydia Leonardo
Duration: 06/2021 to 06/2025
Funding Agency: WHO WPRO
An integrative diagnostic approach in detecting human and animal schistosomiasis in situations of varying levels of prevalence in the Philippines
Principal Investigator: Raffy Fornillos
Co-Investigators: Dr. Ian Tabios, Dr. Ian Fontanilla, Dr. Aleyla de Cadiz, Dr. Lydia Leonardo
Duration: 07/2021 to 06/2025
Funding Agency: WHO TDR
Research Activities
Punching of blood cards
PCR Reagent preparation
Realtime PCR assay
Maintenance of snail aquaria
PCR reagent preparation
Training of laboratory analyst
Public health forum
Malacological survey
Field microscopy
Field interviews
Processing of stool specimens
Animal blood collection
Recent Publications
Parasitology and Biodiversity
Boco SR, Capidos CG, Fornillos RJ, Sucharitakul P, Lawley JW, Talacay D, Collins AG, Fontanilla IK, Comendador JE, Ladiao FR. Molecular signatures reveal intra-species divergence, undetectable by traditional morphology, in the deadly box jellyfish, Chironex yamaguchii (Cubozoa; Chirodropidae) of Western Pacific. Regional Studies in Marine Science. 2025 Jan 19:104033.
Tenorio JC, Tabios IK, Inpankaew T, Ybañez AP, Tiwananthagorn S, Tangkawattana S, Suttiprapa S. Ancylostoma ceylanicum and other zoonotic canine hookworms: neglected public and animal health risks in the Asia–Pacific region. Animal Diseases. 2024 Apr 10;4(1):11.
Manalo DL, Bolivar JK, Yap PR, Gomez MR, Saldo ZP, Espino MJ, Dilig JE, Fornillos RJ, Perez SA, Baga RA, Sunico LS, Fontanilla IC, Leonardo LR. From Perpetual Wetness to Soil Chemistry: Enumerating Environmental and Physicochemical Factors Favoring Oncomelania hupensis quadrasi Snail Presence in the Municipality of Gonzaga, Cagayan, Philippines. Tropical Medicine and Infectious Disease. 2023 Dec 29;9(1):9.
Cando LF, Perias GA, Tantengco OA, Dispo MD, Ceriales JA, Girasol MJ, Leonardo LR, Tabios IKB. The Global Prevalence of Schistosoma mansoni, S. japonicum, and S. haematobium in Pregnant Women: A Systematic Review and Meta-Analysis. Tropical Medicine and Infectious Disease. 2022 Nov 4;7(11):354.
Tabios IKB, Sato MO, Tantengco OAG, Fornillos RJC, Kirinoki M, Sato M, Rojo RD, Fontanilla IKC, Chigusa Y, Medina PMB, Kikuchi M, Leonardo LR. Circulating microRNAs as biomarkers of hepatic fibrosis in schistosomiasis japonica patients in the Philippines. Diagnostics. 2022 Aug 5;12(8):1902.
Tabios IKB, Sato MO, Tantengco OAG, Fornillos RJC, Kirinoki M, Sato M, Rojo RD, Fontanilla IKC, Chigusa Y, Medina PMB, Kikuchi M, Leonardo LR. Diagnostic Performance of Parasitological, Immunological, Molecular, and Ultrasonographic Tests in Diagnosing Intestinal Schistosomiasis in Fieldworkers From Endemic Municipalities in the Philippines. Front Immunol. 2022 Jun 14;13:899311.
Cruz TT, Llanes KK, Toledo JM, Catabay JA, Fornillos RJ, Fontanilla IK, Paller VG. Prevalence and Molecular Characterization of Ascaridoid Parasites of Philippine Decapterus species. Journal of Nematology. 2022 Feb;54(1).
Fornillos RJ, Que GC, Mendoza RV, Fontanilla IK, Ong PS. Molecular Identification of the Chinese Pond Mussel Sinanodonta woodiana (Lea, 1834) from Mindoro and Leyte Islands, Philippines. Science Diliman. 2021 Jul 1;33(2).
Public Health and Primary Care
Tabios IK, Tantengco OA, Limpoco AG, Domingo GD, Ornos ED, Apostol-Nicodemus L. Anxiety, depression, and family dysfunction among COVID-19 patients admitted to hospital and isolation facilities in the Philippines. SciEnggJ 17 (Supplement) 391-399.
Francisco AG, Reyes JC, Tabios IK, Cruz CJ, Ang MA, Heralde III FM, Lacuna AR, de Paz-Silava SL. Seroprevalence of human adenovirus type 5 neutralizing antibodies in the Philippines. Plos one. 2023 Dec 1;18(12):e0293046.
Apostol-Nicodemus L, Tabios IKB, Limpoco AGO, Domingo GDP, Tantengco OAG. Psychosocial Distress among Family Members of COVID-19 Patients Admitted to Hospital and Isolation Facilities in the Philippines: A Prospective Cohort Study. J Clin Med. 2022 Sep 5;11(17):5236.
Multi-omics in Health Research
Climacosa FM, Anlacan VM, Gordovez FJ, Reyes JC, Tabios IK, Manalo RV, Cruz JM, Asis JL, Razal RB, Abaca MJ, Dacasin AB. Monitoring drug Efficacy through Multi-Omics Research initiative in Alzheimer’s Disease (MEMORI-AD): A protocol for a multisite exploratory prospective cohort study on the drug response-related clinical, genetic, microbial and metabolomic signatures in Filipino patients with Alzheimer’s disease. BMJ open. 2024 Nov 1;14(11):e078660.
Lintao RCV, Cando LFT, Perias GAS, Tantengco OAG, Tabios IKB, Velayo CL, de Paz-Silava SLM. Current Status of Human Papillomavirus Infection and Cervical Cancer in the Philippines. Front Med. 2022 Jun 20;9:929062.
de Paz-Silava SLM, Tabios IKB, Tantengco OAG, Climacosa FMM, Velayo CL, Lintao RCV, Cando LFT, Perias GAS, Idolor MIC, Francisco AG, Catral CDM, Chiong CM, Dalmacio LMM. Determinants of Acquisition, Persistence, and Clearance of Oncogenic Cervical Human Papillomavirus Infection in the Philippines Using a Multi-Omics Approach: DEFEAT HPV Study Protocol. Healthcare. 2023; 11(5):658.
Completed Research & Extension Projects
Seroprevalence of human Adenovirus 5 neutralizing antibodies in an adult population from urban Philippines: Implications on adenoviral vector-based SARS-CoV-2 vaccines
Principal Investigator: Dr. Sheriah Laine M. de Paz-Silava
Co-Investigators: Dr. Ian Tabios, Dr. John Carlo Reyes,
Dr. Criselda Cruz, Dr. Mark Ang
Duration: 02/01/2021 to 01/31/2023 | Funding Agency: DOST-PCHRD
Demonstrating the genotyping applications in health of rDBS collected by the Philippine Newborn Screening Program using XDP as disease model
Principal Investigator: Dr. Ian Tabios
Co-PI: Dr. Eva Maria C. Cutiongco-de la Paz
Duration: 01/1/2023 to 12/31/2023 | Funding Agency: NSRI
UP TRAINS: University of the Philippines training assistance program to DOH and RITM
Project Leader: Dr. Eva Maria C. Cutiongco-de la Paz
Co-PL: Dr. Ian Tabios
Duration: 2021 to 2023 | Funding Agency: DOH
Institute of Biology, College of Science
University of the Philippines Diliman
You may send your inquiries to pubhealthbio.upd@gmail.com