Monitoring of food contamination and surveillance of chemical hazard in African countries

• Project/Area Number: 24405004
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Risk sciences of radiation/Chemicals
• Research Institution: Hokkaido University
• Principal Investigator: ISHIZUKA Mayumi 北海道大学, (連合)獣医学研究科, 教授 (50332474)
• Co-Investigator(Kenkyū-buntansha): IKENAKA Yoshinori 北海道大学, 大学院獣医学研究科, 准教授 (40543509)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
• Keywords: アフリカ / 環境汚染 / 産業動物 / 家畜 / 野生動物 / エジプト / ザンビア / ガーナ / 南アフリカ / エチオピア / ナイジェリア

Outline of Final Research Achievements

Environmental pollution is a serious problem in most African countries. Persistent chemicals such as heavy metals, pesticides, dioxins, PCBs, etc. can be found not only in water, soil, air, plant, but also in the livestock animals. Monitoring these pollutant levels in food animals is of great importance to the wellbeing of all life forms. In this study, we measured accumulated levels of these environmental pollutants in animals and clarified the effects of chemical hazard on human and animals.

Research Products

• [Journal Article] Mercury concentrations in primary feathers reflect pollutant exposure in discrete non-breeding grounds used by Short-tailed Shearwaters (2015)
  • Author(s): Watanuki Y, Yamamoto T, Yamashita A, Ishii C, Ikenaka Y, Nakayama SMM, Ishizuka M, Suzuki Y, Niizuma Y, Meathrel CE, Phillips RA
  • Journal Title: Journal of Ornithology Volume: inpress Issue: 3 Pages: 847-850
  • DOI: 10.1007/s10336-015-1205-6
  • NAID: 120005768771
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Levels, potential sources and human health risk of polycyclic aromatic hydrocarbons (PAHs) in particulate matter (PM10) in Kumasi-Ghana (2015)
  • Author(s): Bortey-Sam N, Ikenaka Y, Akoto O, Nakayama M.M.S, Yared YB, Baidoo E, Mizukawa H, Ishizuka M
  • Journal Title: Environ Sci Pollut Res Volume: 22 Issue: 13 Pages: 160-167
  • DOI: 10.1007/s11356-014-4022-1
  • NAID: 120005768774
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Lead poisoning in children from townships in the vicinity of a lead-zinc mine in Kabwe, Zambia (2015)
  • Author(s): Yabe J, Nakayama SMM, Ikenaka Y, Yohannes YB, Bortey-Sam N, Oroszlany B, Muzandu K, Choongo K, Kabalo AN, Ntapisha J, Mweene A, Umemura T, Ishizuka M
  • Journal Title: Chemosphere Volume: 119 Pages: 941-947
  • DOI: 10.1016/j.chemosphere.2014.09.028
  • NAID: 120005603796
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] TCDD-induced chick cardiotoxicity is abolished by a selective cyclooxygenase-2 (COX-2) inhibitor NS398 (2014)
  • Author(s): Fujisawa N, Nakayama SMM, Ikenaka Y, Ishizuka M
  • Journal Title: Arch. Toxicol Volume: 88 Issue: 9 Pages: 1739-1748
  • DOI: 10.1007/s00204-014-1225-7
  • NAID: 120005649117
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Occurrence, distribution, sources and toxic potential of polycyclic aromatic hydrocarbons (PAHs) in surface soils from the Kumasi Metropolis, Ghana (2014)
  • Author(s): Bortey-Sam N, Ikenaka Y, Nakayama SMM, Akoto O, Yohannes YB, Baidoo E, Mizukawa H, Ishizuka M
  • Journal Title: Sci Total Environ Volume: 496 Pages: 471-478
  • DOI: 10.1016/j.scitotenv.2014.07.071
  • NAID: 120005496513
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Organochlorine pesticides in bird species and their prey (fish) from the Ethiopian Rift Valley region, Ethiopia. (2014)
  • Author(s): Yohannes YB, Ikenaka Y, Nakamyama SMM, Ishizuka M
  • Journal Title: Environmental Pollution Volume: 192 Pages: 121-128
  • DOI: 10.1016/j.envpol.2014.05.007
  • NAID: 120005476098
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Concentrations and human health risk assessment of organochlorine pesticides in edible fish species from a Rift Valley Lake-Lake Ziway, Ethiopia (2014)
  • Author(s): Yohannes YB, Ikenaka Y, Saengtienchai A, Watanabe KP, Nakamyama SMM, Ishizuka M
  • Journal Title: Ecotoxicol. Environ. Saf. Volume: 106 Pages: 121-128
  • DOI: 10.1016/j.ecoenv.2014.04.014
  • NAID: 120005468140
  • Peer Reviewed
• [Journal Article] Distribution of heavy metals in organs of sheep and goat reared in Obuasi: A gold mining town in Ghana (2014)
  • Author(s): Akoto O, Bortey-Sam N, Nakayama SMM, Ikenaka Y, Baidoo E, Yohannes YB, Mizukawa H, Ishizuka M
  • Journal Title: Int. J. Environ. Sci. Toxic Volume: 2 Pages: 81-89
  • Peer Reviewed / Open Access
• [Journal Article] Molecular characterization and mRNA expression of cytochrome P450 1A1 and cytochrome P450 3A in liver of Kafue Lechwe (Kobus leche kafuensis) as potential biomarkers of pollution of the Kafue River basin, Zambia. (2014)
  • Author(s): M’kandawire E, Syakalima M, Muzandu K, Pandey G, Simuunza M, Nakayama SMM, Kawai YK, Ikenaka Y, Ishizuka M.
  • Journal Title: Engineering Volume: 印刷中 Issue: 02 Pages: 51-58
  • DOI: 10.4236/eng.2014.62008
  • Peer Reviewed
• [Journal Article] The effect of copper on the mRNA expression profile of xenobiotic-metabolizing enzymes in cultured rat H4-II-E cells. (2014)
  • Author(s): Darwish WS, Ikenaka Y, Nakayama SMM, Ishizuka M.
  • Journal Title: Biol Trace Elem Res Volume: (印刷中) Issue: 2 Pages: 51-58
  • DOI: 10.1007/s12011-014-9915-9
  • Peer Reviewed
• [Journal Article] An Overview on Mycotoxin Contamination of Foods in Africa (2014)
  • Author(s): Darwish WS, Ikenaka Y, Nakayama SMM, Ishizuka M
  • Journal Title: Journal of Veterinary Medical Science Volume: 76 Issue: 6 Pages: 789-797
  • DOI: 10.1292/jvms.13-0563
  • NAID: 130003391291
  • ISSN: 0916-7250, 1347-7439
  • Peer Reviewed / Open Access
• [Journal Article] Toxicokinetics and tissue depletion of Fusarenon-X and its metabolite nivalenol in piglets (2014)
  • Author(s): Saengtienchai T, Poapolathep S, Isariyodom S, Ikenaka Y, Ishizuka M, Poapolathep A
  • Journal Title: Food Chem Toxicoｌ Volume: 66C Pages: 307-312
  • DOI: 10.1016/j.fct.2014.01.053
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Distribution of heavy metals in organs of sheep and goat reared in Obuasi: A gold mining town in Ghana. (2014)
  • Author(s): Akoto O, Bortey-Sam N, Nakayama SMM, Ikenaka Y, Baidoo E, Yohannes YB, Mizukawa H, Ishizuka M.
  • Journal Title: Int. J. Environ. Sci. Toxic. Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Occurrence, distribution and ecological risk assessment of DDTs and heavy metals in surface sediments from Lake Awassa; Ethiopian Rift Valley Lake. (2013)
  • Author(s): Yohannes YB, Ikenaka Y, Saengtienchai A, Watanabe KP, Nakamyama SMM, Ishizuka M.
  • Journal Title: Environ Sci Pollut Res Volume: 20 Issue: 12 Pages: 8663-8671
  • DOI: 10.1007/s11356-013-1821-8
  • Peer Reviewed
• [Journal Article] Accumulation and biological effects of metals in wild rats in mining areas of Zambia. (2013)
  • Author(s): Nakayama SMM, Ikenaka Y, Hamada K, Muzandu K, Choongo K, Yabe J, Umemura T, Ishizuka M
  • Journal Title: Environmental Monitoring and Assessment Volume: in press Issue: 6 Pages: 4907-4918
  • DOI: 10.1007/s10661-012-2912-6
  • Peer Reviewed
• [Journal Article] Metal distribution in tissues of free-range chickens near a lead-zinc mine in Kabwe, Zambia (2013)
  • Author(s): Yabe J, Nakayama SMM, Ikenaka Y, Muzandu K, Choongo K, Mainda G, Kabeta N, Ishizuka M, Umemura T
  • Journal Title: Environ Toxicol Chem. Volume: 32 Issue: 1 Pages: 189-92
  • DOI: 10.1002/etc.2029
  • Peer Reviewed
• [Journal Article] Molecular evaluation of a new highly sensitive aryl hydrocarbon receptor in ostriches. (2013)
  • Author(s): Fujisawa N, Darwish WS, Ikenaka Y, Kim E, Lee J, Iwata H, Nakayama SMM, Ishizuka M.
  • Journal Title: Poultry Science Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Organochlorine pesticides and heavy metals in fish from Lake Awassa ; Ethiopia : Insights from stable isotope analysis. (2013)
  • Author(s): Yared BY, Ikenaka Y, Nakayama SMM, Saengtienchai A, Watanabe K,
  • Journal Title: Chemosphere Volume: (印刷中)
  • NAID: 120005295656
  • Peer Reviewed
• [Journal Article] GIS-based source estimation of Cu pollution in Lake Itezhi-tezhi and metal accumulation profiles in Oreochromis spp. from both field and laboratory studies. (2013)
  • Author(s): Shouta M.M. Nakayama*, Yoshinori Ikenaka*, Kaampwe Muzandu, Kennedy Choongo, John Yabe, Taro Muroya, Shigeho Ijiri, Masao Minagawa, Takashi Umemura, Mayumi Ishizuka.
  • Journal Title: Arch Environ Contam Toxicol. Volume: 64 Issue: 1 Pages: 119-29
  • DOI: 10.1007/s00244-012-9802-3
  • Peer Reviewed
• [Journal Article] Organochlorine pesticides and heavy metals in fish from Lake Awassa, Ethiopia : Insights from stable isotope analysis (2012)
  • Author(s): Yared Beyene YOHANNES, et al.
  • Journal Title: Chemosphere Volume: 91 Issue: 6 Pages: 857-863
  • DOI: 10.1016/j.chemosphere.2013.01.047
  • Peer Reviewed
• [Journal Article] Cytochrome P450 3A mRNA expression along goat and rat gastrointestinal tracts. (2012)
  • Author(s): Dominic MUREITHI, Wageh Sobhy DARWISH, Yoshinori IKENAKA, Laetitia KANJA, Mayumi ISHIZUKA.
  • Journal Title: Jpn. J. Vet. Res. Volume: 60 Pages: 205-210
  • NAID: 120005008268
  • Peer Reviewed
• [Journal Article] Accumulation of Metals in the Liver and Kidneys of Cattle from Agricultural Areas in Lusaka, Zambia (2012)
  • Author(s): Yabe J, Nakayama SMM, Ikenaka Y, Muzandu K, Ishizuka M, Umemura T.
  • Journal Title: Journal of Veterinary Medical Science Volume: 74 Issue: 10 Pages: 1345-1347
  • DOI: 10.1292/jvms.12-0142
  • NAID: 130001879835
  • ISSN: 0916-7250, 1347-7439
  • Peer Reviewed
• [Journal Article] The nucleotide sequence of metallothioneins (MT) in liver of the Kafue lechwe (Kobus leche kafuensis) and their potential as biomarkers of heavy metal pollution of the Kafue River. (2012)
  • Author(s): M' kandawire E, Syakalima M, Muzandu K, Pandey G, Simuunza M, Nakayama SM, Kawai YK, Ikenaka Y, Ishizuka M
  • Journal Title: Gene Volume: 506 Pages: 310-316
  • Peer Reviewed
• [Journal Article] Effects of environmental lead contamination on cattle in a lead/zinc mining area : changes in cattle immune systems on exposure to lead in vivo and in vitro. (2012)
  • Author(s): Ikenaka Y, Nakayama SMM, Muroya T, Yabe J, Konnai S, Darwish WS, Muzandu K, Choongo K, Mainda G, Teraoka H, Umemura T, Ishizuka M.
  • Journal Title: Environ Toxicol Chem. Volume: 31 Issue: 10 Pages: 2300-2305
  • DOI: 10.1002/etc.1951
  • Peer Reviewed
• [Journal Article] Metal and metalloid levels and bio-accumulation characteristics in soil, sediment, land plants and hippopotami (Hippopotamus amphibius L) from the South Luangwa National Park, Zambia (2012)
  • Author(s): 中山翔太
  • Journal Title: Ecotoxicology and Environmental Safety Volume: (印刷中) Pages: 333-338
  • DOI: 10.1016/j.ecoenv.2012.04.003
  • Peer Reviewed
• [Presentation] 外来化学物質の代謝の種差 (2015)
  • Author(s): 石塚真由美、中山翔太、水川葉月、池中良徳
  • Organizer: 第31回日本毒性病理学シンポジウム
  • Place of Presentation: タワーホール船堀、東京
  • Year and Date: 2015-01-29
  • Invited
• [Presentation] Distribution of toxic metals in free-range chicken, goat and sheep in Ghana and other African countries; and assessment of potential risks to human health through consumption (2014)
  • Author(s): Nesta Bortey-Sam, Shouta M.M. Nakayama, Yoshinori Ikenaka, Yared Beyene Yohannes, Elvis Baidoo, Hazuki Mizukawa, Osei Akoto, Mayumi Ishizuka
  • Organizer: SETAC North America 35th Annual Meeting
  • Place of Presentation: Vancouver Convention Centre, Vancouver, Canada
  • Year and Date: 2014-11-09 – 2014-11-13
• [Presentation] Contamination status and biotransformation of organohalogen compounds in cats and dogs (2014)
  • Author(s): Hazuki Mizukawa, Kei Nomiyama, Susumu Nakatsu, Akira Kubota, Hisato Iwata, Yoshinori Ikenaka, Shouta M.M. Nakayama, Shinsuke Tanabe, Mayumi Ishizuka
  • Organizer: 12th International Symposium on Cytochrome P450 Biodiversity and Biotechnology
  • Place of Presentation: Conference Hall of the Kyoto International Foundation, Kyoto, Japan
  • Year and Date: 2014-09-24 – 2014-09-28
• [Presentation] Mammalian interspecies differences in xenobiotic phase II reaction (2014)
  • Author(s): Yoshinori Ikenaka, Saengtienchai Aksorn, Mayu Kakehi, Shouta M.M. Nakayama, Hazuki Mizukawa, Mayumi Ishizuka
  • Organizer: 12th International Symposium on Cytochrome P450 Biodiversity and Biotechnology
  • Place of Presentation: Conference Hall of the Kyoto International Foundation, Kyoto, Japan
  • Year and Date: 2014-09-24 – 2014-09-28
  • Invited
• [Presentation] Species differences of UDP-glucuronosyltransferases (UGTs) in Carnivores (2014)
  • Author(s): Mayu Kakehi, Yoshinori Ikenaka, Shouta MM Nakayama, Hazuki Mizukawa,Kensuke P Watanabe, Kentaro Sakamoto, Akihiko Wada, Kaoru Hattori,Shinsuke Tanabe, Kei Nomiyama, Mayumi Ishizuka
  • Organizer: 12th International Symposium on Cytochrome P450 Biodiversity and Biotechnology
  • Place of Presentation: Conference Hall of the Kyoto International Foundation, Kyoto, Japan
  • Year and Date: 2014-09-24 – 2014-09-28
• [Presentation] アフリカのゴミ集積場における化学物質の汚染実態と生体への健康影響の評価：ナイロビのダンドラ地域における家畜の重金属汚染の例 (2014)
  • Author(s): 中田北斗、中山翔太、水川葉月、池中良徳、石井千尋、ヨハンネス ヤレド ベイヤネ、ヤベジョン、今内覚、石塚真由美
  • Organizer: 第157回日本獣医学会学術集会
  • Place of Presentation: 北海道大学 高等教育推進機構、北海道
  • Year and Date: 2014-09-09 – 2014-09-12
• [Presentation] ニワトリにおけるDDTの汚染状況と臓器蓄積性の解析 (2014)
  • Author(s): 伊藤玄悟、池中良徳、Beyene Yared、中山翔太、水川葉月、Vuren Johannes、Wepener Victor、Smit Nico、Wynand Vlok、石塚真由美
  • Organizer: 第157回日本獣医学会学術集会
  • Place of Presentation: 北海道大学 高等教育推進機構、北海道
  • Year and Date: 2014-09-09 – 2014-09-12
• [Presentation] Investigation of heavy metal contamination and assessment of impact on health in Dandora dumping site, Nairobi (2014)
  • Author(s): Hokuto Nakata, Shouta M.M. Nakayama, Hazuki Mizukawa, Yoshinori Ikenaka, Chihiro Ishii, Yared Beyene Yohannes, John Yabe, Satoru Konnai, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Contamination status of organohalogen compounds and their metabolites in the blood of pet dogs and cats (2014)
  • Author(s): Hazuki Mizukawa, Kei Nomiyama, Miyuki Yamamoto, Yoshinori Ikenaka, Shouta M.M. Nakayama, Shinsuke Tanabe, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Human and ecological health risk assessment of pesticides used for vector control: Current situation and problems of DDT use in Africa (2014)
  • Author(s): Yoshinori Ikenaka, Yared Beyene Yohannes, Lesa Thompson, Shouta M.M. Nakayama, Hazuki Mizukawa, Johannes J. van Vuren, Victor Wepener, Nico J. Smit, Volk Wynand, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Effects of international land-based use of vector-control pesticides on a marine ecosystem: organochlorine analysis of fish from Maputo Bay, Mozambique (2014)
  • Author(s): Lesa Thompson, Yoshinori Ikenaka, Yared Beyene Yohannes, Shouta M.M. Nakayama, Hazuki Mizukawa, Johannes J. van Vuren, Victor Wepener, Nico J. Smit, Volk Wynand, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Pb excretion in feces and urine of exposed children from polluted townships in Kabwe, Zambia (2014)
  • Author(s): John Yabe, Shouta M.M. Nakayama, Yoshinori Ikenaka, Yared B Yohannes, Nesta Bortey-Sam, Balazs Oroszlany, Kaampwe Muzandu, Kennedy Choongo, Abel Nketani Kabalo, John Ntapisha, Aaron Mweene, Takashi Umemura, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Health Risk Assessment of Heavy Metal Residues in Tissues of Cattle and Goats in Benin City, Nigeria (2014)
  • Author(s): Emmanuel Temiotan Ogbomida, Isioma Tongo, Alex Ajeh Enuneku, Martins Oshioriamhe Ainerua, Shouta M.M. Nakayama, Nesta Bortey-Sam, Balazs Oroszlany, Lawrence Ikechukwu Ezemonye, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Distribution of heavy metals in organs of sheep and goat reared in Obuasi, a gold mining town in Ghana (2014)
  • Author(s): Osei Akoto, Nesta Bortey-Sam, Shouta M.M. Nakayama, Yoshinori Ikenaka, Elvis Baidoo, Yared Beyene Yohannes, Hazuki Mizukawa, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Baseline levels and trophic transfer of organochlorine pesticidesic in biota from a sub tropical floodplain in Africa (2014)
  • Author(s): Nico J. Smit, Johan J van Vuren, Claire Edwards, Jonathan Caramin, Lieven Bervoets, Mayumi Ishizuka, Yoshinori Ikenaka, Victor Wepener
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Comparison of the Olifants and Luvuvhu river aquatic food webs, potential food web disturbances and dietary patterns of Hydrocynus vittatus as revealed by stable isotope analyses (2014)
  • Author(s): Ruan Gerber, Victor Wepener, Johan J van Vuren, Shouta M.M. Nakayama, Yoshinori Ikenaka, Mayumi Ishizuka, Nico Smit
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Aquatic toxicology of gold nanoparticles (nAu) in Danio rerio (2014)
  • Author(s): Tarryn Lee Botha, Yoshinori Ikenaka, Shouta M.M. Nakayama, Mayumi Ishizuka, Victor Wepener
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] DDT in amphibians from the lower Phongola floodplain (2014)
  • Author(s): Nico Wolmarans, Victor Wepener, Louis Du Preez, Mayumi Ishizuka, Yoshinori Ikenaka, Nico Smit
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Biomarkers of pollution in Synodontis zambesensis and Hydrocynus vittatus in the lower Pongola river and floodplain (2014)
  • Author(s): Claire Michelle Edwards, Yoshinori Ikenaka, Yared Beyene Yohannes, Shouta M.M. Nakayama, Hazuki Mizukawa, Mayumi Ishizuka, Victor Wepener, Johan J van Vuren
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Antibiotics residues in different poultry meats marketed in Egypt (2014)
  • Author(s): Wageh Sobhy Darwish, Yoshinori Ikenaka, Shouta Nakayama, Mayumi Ishizuka, Eldaly Elsaid, El-Abbasy Mohamed, El-Ghareeb Walid, Tharwat Ahmed, El-Desoky Kamal, Elged Mohamed
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] The impact of environmental stressors on biomarkers in Clarias gariepinus and Oreochromis mossambicus in Ndumo game reserve (2014)
  • Author(s): Mary Tsono Mkhonto, Johan J van Vuren, Nico Smit, Yoshinori Ikenaka, Shouta M.M. Nakayama, Hazuki Mizukawa, Yared Beyene Yohannes, Mayumi Ishizuka
  • Organizer: 6th International Toxicology Symposium in Africa
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2014-08-29
• [Presentation] Environmental Pollution in African countries -Focus on metal and organochlorine pesticide-, International symposium on environmental pollution and food safety (2014)
  • Author(s): Mayumi Ishizuka
  • Organizer: International symposium on environmental pollution and food safety, Zagazig University
  • Place of Presentation: Zagazig, Egypt
  • Year and Date: 2014-08-20
  • Invited
• [Presentation] ケニアの大規模ゴミ集積場・ダンドラ地域における家畜の化学物質汚染の実態と住民の健康影響評価 (2014)
  • Author(s): 中田北斗、中山翔太、水川葉月、池中良徳、石井千尋、ヨハンネス ヤレド ベイヤネ、今内覚、石塚真由美
  • Organizer: 第41回日本毒性学会学術年会
  • Place of Presentation: 神戸コンベンションセンター、兵庫
  • Year and Date: 2014-07-02 – 2014-07-04
• [Presentation] ベクターコントロールのための薬剤散布の生態系およびヒト健康に与える影響評価 (2014)
  • Author(s): 池中良徳、Yared Yohannes、中山翔太、水川葉月、van Vuren Johannes、Wepener Victor、Smit Nico、Wynand Vlok、石塚真由美
  • Organizer: 第23回環境化学討論会
  • Place of Presentation: 京都大学
  • Year and Date: 2014-05-14 – 2014-05-16
• [Presentation] アフリカのゴミ集積場における化学物質の汚染実態と生体への健康影響の評価：ナイロビのダンドラ地域における重金属汚染の例 (2014)
  • Author(s): 中田北斗、中山翔太、水川葉月、池中良徳、石井千尋、ヨハンネス ヤレド ベイヤネ、今内覚、石塚真由美
  • Organizer: 第23回環境化学討論会
  • Place of Presentation: 京都大学
  • Year and Date: 2014-05-14 – 2014-05-16
• [Presentation] Quantification of Neonicotinoids in human urine using liquid chromatography/tandem mass spectrometry (2014)
  • Author(s): Jemima Tiwaa Marfo, Yoshinori Ikenaka, Shouta M. M. Nakayama, Hazuki Mizukawa, Kumiko Taira, Kazutoshi Fujioka, Yoshiko Aoyama, Osei Akoto, Mayumi Ishizuka
  • Organizer: 23rd Symposium on Environmental Chemistry
  • Place of Presentation: Kyoto University
  • Year and Date: 2014-05-14 – 2014-05-16
• [Presentation] Residue levels and health risk assessment of organochlorine pesticides (OCPs) in domesticated animals from Egypt (2014)
  • Author(s): Abdallah Fikry A. Mahmoud, Elsaid A. Eldaly, Alaa Eldin M.A. Morshdy, Yoshinori Ikenaka, Shouta Nakayama, Hazuki Mizukawa, Yared B. Yohannes, Waleed R. El-Ghareeb, Mohamed Tharwat El-Abbasy, Mayumi Ishizuka
  • Organizer: 23rd Symposium on Environmental Chemistry
  • Place of Presentation: Kyoto University
  • Year and Date: 2014-05-14 – 2014-05-16
• [Presentation] Lead pollution in the children in Kabwe mining area, Republic of Zambia (2014)
  • Author(s): Shouta M.M. Nakayama，John Yabe，Yoshinori Ikenaka，Yared Beyene, Balazs Oroszlany, Nesta Bortey-Sam, Kaampwe Muzandu, Kennedy Choongo, Abel Kabalo, John Ntapisha, Aaron Mweene, Takashi Umemura, Mayumi Ishizuka
  • Organizer: 23rd Symposium on Environmental Chemistry
  • Place of Presentation: Kyoto University
  • Year and Date: 2014-05-14 – 2014-05-16
• [Presentation] Health risk assessment of atmospheric polycyclic aromatic hydrocarbons in Kumasi-Ghana (2014)
  • Author(s): Nesta Bortey-Sam, Yoshinori Ikenaka, Shouta M.M. Nakayama, Osei Akoto, Yared Beyene Yohannes, Hazuki Mizukawa, Mayumi Ishizuka
  • Organizer: 23rd Symposium on Environmental Chemistry
  • Place of Presentation: Kyoto University
  • Year and Date: 2014-05-14 – 2014-05-16
• [Presentation] Lead pollution in soil, domestic animals and children from townships near a lead-zinc mine in Kabwe, Zambia. (2014)
  • Author(s): 32.Shouta M.M. Nakayama, John Yabe, Yoshinori Ikenaka, Yared B. Yohannes, Balazs Oroszlany, Nesta Bortey-Sam, Kaampwe Muzandu, Kennedy Choongo, Abel Nketani Kabalo, John Ntapisha, Aaron Mweene, Takashi Umemura, Mayumi Ishizuka
  • Organizer: SOT 53rd Annual Meeting
  • Place of Presentation: Phoenix Convention Center, USA
• [Presentation] Pb and Cd contaminated soil may cause metal accumulation and epigenetic alteration in rat tissues. (2014)
  • Author(s): 33.Shouta M.M. Nakayama, Yoshinori Ikenaka, Yared B. Yohannes, Balazs Oroszlany, Nesta Bortey-Sam, Kaampwe Muzandu, John Yabe, Takashi Umemura, Mayumi Ishizuka
  • Organizer: SOT 53rd Annual Meeting
  • Place of Presentation: Phoenix Convention Center, USA
• [Presentation] アフリカ諸国における化学物質汚染 : 金属およびメタロイド汚染を中心に (2013)
  • Author(s): 石塚真由美
  • Organizer: 第59回トキシンシンポジウム
  • Place of Presentation: とかちプラザ(帯広市)
  • Year and Date: 2013-08-30
• [Presentation] Incidence of Metals and Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Soils from the Kumasi Metropolis, Ghana- GIS Based Approach. (2013)
  • Author(s): Nesta Bortey-Sam, Osei Akoto, Yoshinori Ikenaka, Elvis Baidoo, Beyene Yared, Shouta M.M. Nakayama, Mayumi Ishizuka.
  • Organizer: 第22回環境化学討論会
  • Place of Presentation: 東京農工大学、東京
• [Presentation] OCPs in Fish and Bird Species from a DDT Spraying and Agriculture Area in Ethiopia. (2013)
  • Author(s): Yared B. Yohannes, Yoshinori Ikenaka, Shouta M.M. Nakayama, Mayumi Ishizuka.
  • Organizer: 第22回環境化学討論会
  • Place of Presentation: 東京農工大学、東京
• [Presentation] Effects of Pb and Cd contaminated soil on metal accumulation and epigenetic alteration in rat, (2013)
  • Author(s): Shouta M.M. Nakayama, Yoshinori Ikenaka, Kaampwe Muzandu, John Yabe, Takashi Umemura, Mayumi Ishizuka
  • Organizer: 第22回環境化学討論会
  • Place of Presentation: 東京農工大学、東京
• [Presentation] ガーナの金鉱山周辺（オブアシ自治区）におけるヒ素汚染と陸生哺乳類への毒性影響評価 (2013)
  • Author(s): 大谷豪、池中良徳、中山翔太、Osei Akoto、Joseph Apau、Elvis Baidoo、石塚真由美
  • Organizer: 第22回環境化学討論会
  • Place of Presentation: 東京農工大学、東京
• [Presentation] OCPs profiles in Birds and Their Prey from Ethiopian Rift Valley Region. (2013)
  • Author(s): Yared B. Yohannes, Yoshinori Ikenaka, Shouta M.M. Nakayama, Mayumi Ishizuka
  • Organizer: 6th SETAC Africa Conference
  • Place of Presentation: Intercontinental Hotel Lusaka, Lusaka, Zambia
• [Presentation] Lead poisoning in children from townships in the vicinity of a lead-zinc mine in Kabwe, Zambia. (2013)
  • Author(s): John Yabe, Shouta M.M. Nakayama, Yoshinori Ikenaka, Yared B. Yohannes, Nesta Bortey-Sam, Balazs Oroszlany, Kaampwe Muzandu, Kennedy Choongo, John Ntapisha, Aaron Mweene, Abel Kabalo, Koji Arizono, Takashi Umemura, Mayumi Ishizuka
  • Organizer: 6th SETAC Africa Conference
  • Place of Presentation: Intercontinental Hotel Lusaka, Lusaka, Zambia
• [Presentation] Accumulation features of organochlorine pesticides in resident birds and their prey from Ethiopian Rift Valley Region. (2013)
  • Author(s): Yared B. Yohannes, Yoshinori Ikenaka, Shouta M.M. Nakayama, Mayumi Ishizuka
  • Organizer: SETAC North America 34th Annual Meeting
  • Place of Presentation: Gaylord Opryland Hotel and Convention Center （USA)
• [Presentation] poisoning in children from townships around a lead-zinc mine in Kabwe, Zambia. (2013)
  • Author(s): Shouta M.M. Nakayama, John Yabe, Yoshinori Ikenaka, Kaampwe Muzandu, John Ntapisha, Aaron Mweene, Abel Kabalo, Takashi Umemura, Mayumi Ishizuka,
  • Organizer: SETAC North America 34th Annual Meeting
  • Place of Presentation: Gaylord Opryland Hotel and Convention Center （USA)
• [Presentation] Accumulation characteristics of arsenic and metals in environmental samples and wild black rat (Rattus rattus) in gold mining area, Obuasi, Ghana. (2013)
  • Author(s): Shouta M.M. Nakayama, Go Otani, Yoshinori Ikenaka, Yared B Yohannes, Osei Akoto，Joseph Apau，Elvis Baidoo, Mayumi Ishizuka
  • Organizer: SETAC North America 34th Annual Meeting
  • Place of Presentation: Gaylord Opryland Hotel and Convention Center （USA)
• [Presentation] Pb and Cd contaminated soil may cause metal accumulation and epigenetic alteration in laboratory rat and wild black rat. (2013)
  • Author(s): Shouta M.M. Nakayama, Yoshinori Ikenaka, Yared B. Yohannes, Balazs Oroszlany, Nesta Bortey-Sam, Kaampwe Muzandu, John Yabe, Takashi Umemura, Mayumi Ishizuka
  • Organizer: SETAC North America 34th Annual Meeting
  • Place of Presentation: Gaylord Opryland Hotel and Convention Center （USA)
• [Presentation] Characteristics of phase II metabolism reaction in pig : Clear sulfation and sulfotransferase activity observed in pyrene. (2013)
  • Author(s): Aksorn Saengtienchai, Yoshinori Ikenaka, Shouta M. M. Nakayama, Yusuke Kawai, Mayumi Ishizuka
  • Organizer: The 155th Meeting of the Japanese Society of Vetenrinary Science
  • Place of Presentation: Tokyo University, Tokyo
• [Presentation] Metal contaminated soil from mining area caused accumulation and biological responses in rats -from field and laboratory studies - (2012)
  • Author(s): Shouta M. M. Nakayama, Yoshinori Ikenaka, Kaampwe Muzandu, Kennedy Choongo, John
  • Organizer: SETAC Asia/Pacific Annual Meeting 2012
  • Place of Presentation: ANA New Sky Hotel Kumamoto
  • Year and Date: 2012-09-25
• [Presentation] Bioaccumulation levels of organochlorine pesticides in fish species from Ethiopian Rift Valley Lake Ziway, Ethiopia (2012)
  • Author(s): Yared B. Yohannes, Yoshinori Ikenaka, Shouta M. M. Nakayama, Aksorn Saengtienchai, Kensuke Watanabe, Mayumi Ishizuka
  • Organizer: SETAC Asia/Pacific Annual Meeting 2012
  • Place of Presentation: ANA New Sky Hotel Kumamoto
  • Year and Date: 2012-09-25
• [Presentation] Metal contaminated soil from mining area caused metal accumulation and biological responses in rats -from field and laboratory studies- (2012)
  • Author(s): Shouta M. M. Nakayama, Yoshinari Ikenaka, Kaampwe Muzandu, Kennedy Ghoongo, John Yabe, Takashi Umemura, Mayumi Ishizuka,
  • Organizer: 4th International Toxicology Symposium in Africa
  • Place of Presentation: The University of Zambia, Lusaka, Zambia
  • Year and Date: 2012-09-03
• [Presentation] Levels and Bioaccumulation of Organochlorine Pesticides in Fish Species from Lake Ziway, ETHIOPIA. (2012)
  • Author(s): Yared B. Yohannes, Yoshinori IKENAKA, Kensuke WATANABE,
  • Organizer: 21th symposium on Environmental Chemistry
  • Place of Presentation: Himegin Hole, Matsuyama
  • Year and Date: 2012-07-12
• [Remarks] 北海道大学大学院獣医学研究科毒性学教室
  • URL: http://tox.vetmed.hokudai.ac.jp/