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Parasitology Lab
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The lab explores the interplay between parasites and animals to address infectious diseases in both humans and animals.

AboutAbout the lab
Exploring how parasitism works and learning its ingenuity from parasites
The lab studies parasites that live on or in animals.
In parasitism, where one organism relies on another for shelter and nutrition, a relationship of contest arises between the parasite and its host.
By studying this complex and diverse relationship, the lab seeks answers to a central question in veterinary medicine: how best to deal with parasitic infections.
Key terms
- Zoonosis
- An infectious disease transmitted between animals and humans. Many cases occur when a pathogen circulating in animals happens to infect humans.
- Echinococcosis
- An infectious disease in which eggs of a small tapeworm living in the intestines of animals such as foxes enter a person's mouth and cause disease in the liver and other organs.
- Microbiota
- The whole community of microorganisms, such as viruses and bacteria, living in and around an organism.
NewsLab news
Associate Professor Nakao received the Japanese Society of Veterinary Science Award
A student received the Young Researcher Encouragement Award at the joint meeting of the Northern Japan Branches of the Japanese Society of Parasitology and the Japan Society of Medical Entomology and Zoology
A student received an Excellent Presentation Award (Parasitology Section) at the Scientific Meeting of the Japanese Society of Veterinary Science
A student received the Congress President's Award at the joint meeting of the Northern Japan Branches of the Japanese Society of Parasitology and the Japan Society of Medical Entomology and Zoology
Assistant Professor Hayashi received the Encouragement Award from the Japanese Society of Veterinary Parasitology
ResearchResearch themes
The lab studies parasites from many angles, from field surveys in Japan and abroad to molecular biological analysis in the laboratory. Its survey research contributes to preventing infection in humans and controlling parasitic diseases in animals.
*Illustrative imageControlling sources of echinococcosis infection
Echinococcosis is a zoonosis in which parasites circulating in animals infect humans. To help prevent human infection, the lab collaborates with researchers in Japan and abroad on surveys of how Echinococcus is maintained in animals and how to lower infection rates in the animals that transmit it.
*Illustrative imageDiagnosis and epidemiology of parasitic diseases in animals
Animals are infected by a wide range of parasites, from single-celled protozoa to flatworms and nematodes that live inside the body and arthropods that attach to the body surface. Working with people at animal husbandry and veterinary care sites, the lab conducts survey research toward controlling parasitic diseases in animals.
*Illustrative imageAnalyzing the microbes carried by ticks
Ticks carry a variety of microorganisms, including viruses, bacteria, and parasites. Using high-throughput sequencers, the lab comprehensively examines the tick microbiota, focusing especially on symbiotic bacteria and their links to tick physiology and the transmission of pathogenic microbes.
MembersFaculty
Members of the Parasitology Lab consist of faculty, postdoctoral researchers, visiting researchers, technical assistants, technical aides, and doctoral and undergraduate students.As of 2026
- Project ProfessorNariaki Nonaka
- Associate ProfessorRyo Nakao
- Assistant ProfessorNaoki Hayashi
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ezo Red Fox (Vulpes vulpes schrencki), 2024” MIKI Yoshihito / CC BY 2.0 (cropped)
- Controlling sources of echinococcosis infection: “Echinococcus-multilocularis-adult” Alan R Walker / CC BY-SA 3.0 (cropped)
- Diagnosis and epidemiology of parasitic diseases in animals: “Ascaris suum egg” Strongyle / CC BY-SA 3.0 (cropped)
- Analyzing the microbes carried by ticks: “Ixodes ricinus on dry grass” W.alter / CC BY-SA 4.0 (cropped)
- Related lab (公衆衛生学教室): “Culex Mosquito and Micrograph of West Nile Virus Particles” NIAID / CC BY 2.0 (cropped)
- Related lab (実
験動物学教室): “Hispid cotton rat (Sigmodon hispidus) - National Butterfly Center - Mission - Texas - USA” Chuck Homler d/b/a Focus On Wildlife / CC BY-SA 4.0 (cropped) - Related lab (獣医衛生学教室): “Sheep and goats in Arkhangai Province” Bernard Gagnon / CC0 (cropped)
- Related lab (毒性学教室): “Lascar Hippopotamus (Zambezi river) ( )” Jorge Láscar from Australia / CC BY 2.0 (cropped)
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