Dr. Thaddeus M. Carvajal

Associate Professor

Educational Background

PhD in Engineering,
Ehime University, Japan

MS in Biology
De La Salle University, Philippines

BS in Biology
De La Salle University, Philippines

Thaddeus M. Carvajal is a faculty of the Department of Biology under the College of Science at De La Salle University (DLSU). Dr. Carvajal received his Bachelor of Science and Masters in Biology from De La Salle University. He finished his Doctor of Engineering (Dr.Eng) from Ehime University, Japan. After his doctorate course, he was awarded to become a Research Fellow under the Japanese Society for the Promotion of Science (JSPS) in the same university. Currently, he is a Balik-Scientist Fellow under the Philippine Council for Health and Research Development (PCHRD) of the Department of Science and Technology (DOST). Dr. Carvajal has a broad training and experience in research, teaching and extension. His research interest focuses on the vector biology, ecology and control of medically-important arthropods specifically in mosquitoes where he employs various approaches such as genomics, machine learning and nanotechnology in understanding their biology, ecology and its control. Furthermore, Dr. Carvajal is a seasoned professor with nearly 10 years of teaching experience in the tertiary level. He is also an active member of different scientific organizations (e.g. National Research Council of the Philippines, Philippine Society for Microbiology and many more) with some serving as an officer or board member.

Research Interest

  • Vector Biology
  • Ecology and Control of Medically-Important Arthropods

Selected Publications

  • Lia Faridah, Nisa Fauziah, Dwi Agustian, I Gede Nyoman Mindra Jaya, Ramadhani Eka Putra, Savira Ekawardhani, Nurrachman Hidayath, Imam Damar Djati, Thaddeus M Carvajal, Wulan Mayasari, Fedri Ruluwedrata Rinawan, Kozo Watanabe. 2022 Temporal Correlation Between Urban Microclimate, Vector Mosquito Abundance, and Dengue Cases. Journal of Medical Entomology, 59(3): 1008–1018
  • Merabti B., Boumaaza M., Carvajal TM., and RE Harbach. 2021. An updated checklist of the mosquitoes (Diptera: Culicidae) present in Algeria, with assessments of doubtful records and problematic species. Zootaxa.5027(4), 515–545.
  • Jerica Isabel L. Reyes,Yasutsugu Suzuki, Thaddeus Carvajal, Maria Nilda M. Munoz, and Kozo Watanabe. 2021Intracellular Interactions between Arboviruses and Wolbachia in Aedes aegypti. Frontiers in Cellular and Infection Microbiology. 11: 690087
  • Micanaldo Ernesto Francisco, Thaddeus M. Carvajal, Masahiro Ryo,Divina M. Amalin and Kozo Watanabe. 2021.Dengue Disease Dynamics are Modulated by Combinatory Influences of Precipitation and Landscapes using a Machine Learning-based Approach. Science of the Total Environment.792:148406
  • Herbuela, V. R. D. M., T. Karita, T. M. Carvajal, H. T. Ho, J. D. Lorena, R. A. Regalado, G. D. Sobrepeña, and K. Watanabe. 2021. Early Detection of Dengue Fever Outbreaks Using a Surveillance App (Mozzify): Cross-sectional Mixed Methods Usability Study. JMIR Public Health and Surveillance. 7(3):e19034
  • Maria Angenica Fulo Regilme, Thaddeus Carvajal, Ann-Christin Honnen, Divina Amalin and Kozo Watanabe.2021. The Influence of Roads on the Fine-Scale Population Genetic Structure of the Dengue Vector Aedes aegypti (Linnaeus).PLOS Neglected Tropical Diseases. 15(2): e0009139
  • Almarinez, B. J. M., M. J. A. Fadri, R. Lasina, T. M. Carvajal, K. Watanabe, J. C. Legaspi and D. M. Amalin.2021. A Bioclimate-Based Maximum Entropy Model for Comperiella calauanica
  • Barrion, Almarinez & Amalin (Hymenoptera: Encyrtidae) in the Philippines. Insects 12 (1):26 Thaddeus M. Carvajal, Divina Amalin, and Kozo Watanabe. 2021. Wing Geometry and Genetic Analyses Reveal Contrasting Spatial Structures between Male and Female Aedes aegypti(L.) (Diptera; Culicidae) Populations in Metropolitan Manila, Philippines. Infection, Genetics and Evolution, 87:104676
  • Ming-Chih Chiu, Kei Nukazawa, Thaddeus M. Carvajal, V.H. Resh Bin Li and Kozo Watanabe. 2020. Simulation Modeling Reveals the Evolutionary Role of Landscape Shape and Species Dispersal on Genetic Variation within a Metapopulation. Ecography. 43(12): 1891-1901
  • Ming-Chih Chiu, Kei Nukazawa, Thaddeus M. Carvajal, V.H. Resh Bin Li and Kozo Watanabe.2020. Branching Networks Can Have Opposing Influences on Genetic Variation in Riverine Metapopulations. Diversity and Distributions. 26 (12) :1813–1824
  • Jean Claude Balingit, Thaddeus Carvajal, Mariko Obata-Saito, Maribet Gamboa, Amalea Nicolasora, Ava Kristy Sy, Hitoshi Oshitani and Kozo Watanabe. 2020. Surveillance of dengue virus in individual Aedes aegypti mosquitoes collected concurrently with suspected human cases in Tarlac City, Philippines.Parasites & Vectors, 13:594
  • Thaddeus M. Carvajal, Kohei Ogishi, Sakiko Yaegeshi, Lara Fides T. Hernandez, Katherine M. Viacrusis, Howell T. Ho, Divina Amalin, and Kozo Watanabe. 2020. Finescale Population Genetic Structure of Dengue Mosquito Vector, Aedes aegypti. PLOS Neglected Tropical Diseases. 14 (5): e0008279
  • Bin Li, Sakiko Yaegashi, Thaddeus M. Carvajal, Maribet Gamboa and Kozo Watanabe. 2020. Machine Learning Based Detection of Adaptive Divergence of the Stream Mayfly Ephemera strigata Populations. Ecology and Evolution. 10(13): 6677-6687
  • Joeselle M. Serrana, Naoto Ishitani, Thaddeus M. Carvajal, Billy Joel M. Almarinez, Alberto T. Barrion, Divina M. Amalin and Kozo Watanabe. 2019.Unraveling the genetic structure of the coconut scale insect Aspidiotus rigidus Reyne (Hemiptera: Diaspididae) outbreak populations in the Philippines.Insects 10(11):374
  • T.M. Carvajal, KHashimoto, R.K. Harnandika, D.M. Amalin and K Watanabe. 2019. Detection of Wolbachia in Field-Collected Aedes aegyptiin Metropolitan Manila, Philippines. Parasites & Vectors, 12:361
  • T.M. Carvajal, J.D.R. Capitrano, KHashimoto, K.J.D. Go, M.A.I.J. Cruz, M.J.B. Martinez, V.S.P. Tiopianco, D.M. Amalin, and KWatanabe. 2018.Detection and Distribution of Wolbachia Endobacteria in Culex quinquefasciatus Populations (Diptera:Culicidae) From Metropolitan Manila, Philippines. Journal of Vector Borne Diseases, Vol. 55 (3): 265-270
  • H.T. Ho, T.M. Carvajal, J.R. Bautista, J.D.R. Capistrano, K.M. Viacrusis, L.F.T. Hernandez and K Watanabe.2018. Using Google Trends to Examine the Spatio-Temporal Incidence and Behavioral Patterns of Dengue Disease: A Case Study in Metropolitan Manila, Philippines. Tropical Medicine and Infectious Disease 3, 118
  • T.M. Carvajal, K.M. Viacrusis, L.F.T. Hernandez, H.T. Ho, D.M. Amalin, and K Watanabe. 2018. Machine Learning Methods Reveal the Temporal Pattern of Dengue Incidence using Meteorological Factors in Metropolitan Manila, Philippines. BMC Infectious Diseases 18:183
  • T.M.Carvajal, L.F.T Hernandez, H.T. Ho, M.G. Cuenca, B.M.C Orantia, C.R. Estrada, K.M. Viacrusis, D.M. Amalin, and K. Watanabe. 2016. Spatial Analysis of Wing Geometry in Dengue Vector Mosquito, Aedes aegypti (L.) (Diptera; Culicidae), Populations in Metropolitan Manila, Philippines.Journal of Vector Borne Diseases Vol 53 (2): 127-135
  • B.L.J. Almanzor, H.T. Ho and T.M. Carvajal. 2016. Ecdysis Period and Rate Deviations of Dengue Mosquito Vector, Aedes aegypti (L.) (Diptera; Culicidae)Reared in Different Artificial Water-Holding Containers. Journal of Vector Borne Diseases Vol 53 (1); 38-45
  • T.M.Carvajal and J.O. Galvez. 2015. Current Research Status in the Biology of Pink Pigmented Facultative Methylotrohphic (PPFM) Bacteria Belonging to genus Methylobacterium in the Philippines. Philippine Journal of Systematic Biology Vol. 9: 47-62
  • Chua J.C., Uba M.O., and T.M.Carvajal. 2014. A Rapid Assessment of Spider Diversity in Kabigan Falls, Pagudpud, Ilocos Norte, Philippines. Philippine Journal of Systematic Biology Vol. 8: 16-26
  • M.M. Uy, J. Uy, C.Z.R. Castro, T.M.Carvajal, H.T.Ho and A.C.Lee. 2013. Pink Pigmented Facultative Methylotrophic (PPFM) Bacteria Isolated From The Human Scalp And Nasal Cavity. Philippine Journal of Systematic Biology Vol. 7: 13-21
  • Palines JAV, Teves JCP, Carvajal TM., and AC Lee.2012.Pink Pigmented Facultative Methylotrophic (PPFM) Bacteria Isolated From Water Samples In Taal Lake, Talisay, Batangas. The Journal of Tropical Biology. Vol 10: 3-7
  • Karimi, M. and TM Carvajal. 2011. Methicillin-Resistant Staphylococcus aureus (MRSA) From Blood Pressure Apparatus and Stethoscopes. The Journal of Tropical Biology. Vol 9: 3-6
  • Basit S.A. Mendoza C. M., Garcia J.Y.M., Carvajal T.M., and A.C. Lee. 2011. Spatiotemporal Variations in the Physico-chemical and Bacteriological Qualities of Groundwater in Selected Areas of Manila. Emilio Aguinaldo College Research Bulletin Vol. 10(1): 29-40.
  • Carvajal T.M., Tan R.L.,and A.C. Lee. 2011. Pink Pigmented Facultative Methylotrophic (PPFM) bacteria from the Human oral cavity. Philippine Journal of Systematic Biology Vol. 5: 1-9
  • Carvajal T.M. 2010. A Review in Morphological and Molecular Methods in Spider Taxonomy. Trinity Scholar Vol. 3: 69-80
  • Tolentino O., Castro C.Z., Ebreo, M.L.G., Mendoza R.N., Basit S.A. Carvajal T.M. Ho H.T. and A.C. Lee.2010. Use of Isopropyl Alcohol in Disinfecting Blood Pressure Apparatus to Prevent Transmission of Infection to Patients. Philippine Journal of Nursing. 20(1): 17-18
  • Samonte I.E., Canlas R.A., Alvia K., Carvajal T.M. and R.C. Pagulayan. 2009. Multivariate analysis of the biometric features from Philippine sardines – Implications for the phylogenetic relationships of the freshwater Sardinella tawilis (Teleostei, Clupeomorpha). Journal of Zoological Systematics and Evolutionary Research.47(1): 21-24.
  • Carvajal T.M., Castro C.Z., Ho H.T., Tolentino O., Basit S.A. and G. Luna.2008. Cluster Analysis on Bacterial Contamination of Student Nurses’ Uniform in a Tertiary Hospital. Philippine Journal of Nursing. 18(1): 26-28

GET IN TOUCH WITH US

St. La Salle Hall, De La Salle University
2401 Taft Avenue, Malate 1004, Manila, Philippines

College of Science 
(Room 202, William Hall)

Tel. Nos.: (632) 524-4611 loc 520 (trunk line)
(632) 524-0451 (telefax)
E-mail: [email protected]
Biology Department (4th floor William Hall)
Email: [email protected]
Telephone Number: 524-4611 loc. 460

Dr. Billy Joel M. Almarinez

Associate Professor

Educational Background

PhD in Biology
De La Salle University, Philippines

Master of Science in Biology
De La Salle University, Philippines

BS in Biology
Philippine Normal University

Billy is an entomologist of the Biological Control Research Unit (BCRU), and Associate Professor at the Department of Biology of De La Salle University (DLSU) in Manila, Philippines. Currently, he also serves as the current Laboratory Manager of the Imaging and Cell Culture Laboratory (iCELL) of the Central Instrumentation Facility (CIF) in the DLSU Laguna Campus. Billy obtained his Master of Science in Biology and Doctor of Philosophy in Biology degrees from DLSU in 2009 and 2016, respectively. Previous and current research projects of the BCRU which he has been working on focus on integrated pest management (IPM) with emphasis on biologically-based pest management strategies, particularly biological control using parasitoids and predators against agricultural and urban insect pests. He was among the DLSU entomologists who discovered, reported the first record of, and taxonomically described a native species of parasitic wasp, Comperiella calauanica Barrion, Almarinez & Amalin, that is now recognized and accepted as the biological control agent against the “cocolisap”, Aspidiotus rigidus Reyne, a major pest of coconut in the Philippines.Billy is also a licensed professional teacher, having obtained his Bachelor of Science in Biology for Teachers degree from the Philippine Normal University (PNU) and his professional teaching license in 2006. In addition to his experience in teaching tertiary- and graduate-level Biology courses in DLSU, he has also taught at PNU, and at the Technological University of the Philippines in Manila. He is a member of the Philippine Association of Entomologists (PAE) and the Biology Teachers Association of the Philippines (BIOTA). He is also a member of the Philippine Association of Physics and Science Instructors (PAPSI), serving multiple times since 2017 as resource speaker for Biology in trainings and seminars for K to 12 STEM teachers.

Research Interest

  • Entomology, Biology and ecology of insects and spiders
  • Taxonomy and systematics of insects and spiders
  • Biological control using parasitoids and predators for integrated pest management
  • Development and validation of species distribution models to predict pest species distribution and/or invasion risk

Selected Publications

  • Serrana JM, Ormenita LAC, Almarinez BJM, Watanabe K, Barrion AT, Amalin DM. 2022. Life history and host plant assessment of the cacao mirid bug Helopeltis bakeri Poppius (Hemiptera: Miridae). Phytoparasitica, 50 (1): 1-12
  • Almarinez BJM, Fadri MJA, Lasina R, Tavera MAA, Carvajal TM, Watanabe K, Legaspi JC, Amalin DM. 2021. A Bioclimate-Based Maximum Entropy Model for Comperiella calauanica Barrion, Almarinez and Amalin (Hymenoptera: Encyridae) in the Philippines. Insects 12, 26
  • Almarinez BJM, Barrion AT, Navasero MV, Navasero MM, Cayabyab BF, Carandang JSR, Legaspi JC, Watanabe K, Amalin DM. 2020. Biological Control: A Major Component of the Pest Management Program for the Invasive Coconut Scale Insect, Aspidiotus rigidus Reyne, in the Philippines. Insects 11, 745
  • Serrana JM, Ishitani N, Carvajal TM, Almarinez BJM, Barrion AT, Amalin DM, Watanabe K. 2019. Unraveling the genetic structure of the coconut scale insect (Aspidiotus rigidus Reyne) pest outbreak populations in the Philippines. Insects 10, 374
  • Tavera MAA, Cruz DJ, Almarinez BJ, Carandang JS, Amalin D, Janairo JIB. 2019. Volatile chemical profile of the feeding hosts of the coconut scale insect, Aspidiotus rigidus Reyne. Agriculture and Natural Resources 53: 168-172
  • Palen DI, Almarinez BJM, Amalin DM, Legaspi JC, David G. 2019. A host-parasitoid model for Aspidiotus rigidus (Hemiptera: iaspididae) and Comperiella calauanica (Hymenoptera: Encyrtidae). Environmental Entomology 48(1): 134-140.
  • Almarinez BJM, Amalin DM. 2018. Mass Rearing Protocol for Comperiella calauanica: A Biological Control Agent of the Coconut Scale Insect. PCAARRD Information Bulletin 97. 24 pp.
  • Barrion AT, Almarinez BJM, Amalin DM, Carandang JSR. 2016. Comperiella calauanica sp. n. (Hymenoptera: Encyrtidae), an endoparasitoid of the invasive coconut scale, Aspidiotus rigidus Reyne (Hemiptera: Diaspididae) on Luzon Island, Philippines. Asia Life Sciences 25(1): 1-16.
  • Almarinez BJM, Claveria FG. 2015. Larval Mosquito Fauna (Diptera: Culicidae) of Salikneta Farm, San Jose del Monte, Bulacan, Philippines. Philippine Journal of Science 144(1): 51-60.
  • Almarinez BJM, Amalin DM, Carandang JSR, Navasero MV, Navasero MM. 2015. First Philippine record of the parasitoid, Comperiella sp. (Hymenoptera: Encyrtidae): a potential biocontrol agent against Aspidotus rigidus (Hemiptera: Diaspididae). Journal of Applied Entomology 139: 237-240.

GET IN TOUCH WITH US

St. La Salle Hall, De La Salle University
2401 Taft Avenue, Malate 1004, Manila, Philippines

College of Science 
(Room 202, William Hall)

Tel. Nos.: (632) 524-4611 loc 520 (trunk line)
(632) 524-0451 (telefax)
E-mail: [email protected]
Biology Department (4th floor William Hall)
Email: [email protected]
Telephone Number: 524-4611 loc. 460