- Dr Yactayo was the Former Yellow Fever Focal Point at the Control of Epidemic Diseases (CED) at WHO Headquarters in Geneva.
- He joint WHO in 1995, initially working as emergency epidemiologist in different African and Asian countries. From 1999 to 2001, he worked as Regional Advisor in the Preparedness Emergency Programme in PAHO. From 2001 to 2006, he worked in the Lymphatic Filariasis Elimination Programme. From 2007 up to now, he has been working in the Yellow Fever (YF) Initiative funded by the GAVI Alliance, including the management of emergencies.
- His working experience in WHO is mainly oriented towards alert and response to epidemic-prone diseases such as diarrheal diseases, cholera, shigellosis and leishmaniasis.
- Before working at WHO, Dr Yactayo worked at Médecins Sans Frontières and others NGOs as medical doctor in refugee camps or in centres for severe malnourished children. Previous to this experience he worked seven years as a specialist in liver diseases and as gastroenterologist.
- Dr Yactayo is a medical doctor specialized in Public Health. He has a PhD in science history.
Education
- 2000-2007: Ph. D. in Sciences History - University of Nantes, France.
- 1997-1999: Master’s Degree in Sciences History - University of Nantes, France.
- 1990-1991: Master’s Degree in Public Health - University of Rennes II, France.
- 1989-1990: Certificate of deep study in Social Protection - University of Paris VII, France.
- 1985-1989: Diploma of specialisation in Gastroenterology - University of Nantes, France.
- 1987-1988: Certificate of Resident in Hepatology - Medical College of Paris.
- 1975-1983: Diploma of Medical Doctor - University of Peruvian Cayetano Heredia, Lima-Peru.
PROFESSIONAL EXPERIENCE
WHO/OMS/UN Experience:
- From November 2017 to date: Retirement of WHO, Consultant at the Ecole Polytechnique Federal de Lausanne. Project around endocrine disruptors and breast cancer.
- From February 2007 to the date: Medical Officer in the Yellow fever Control Program, Geneva. WHO/HQ. Contributing to built the WHO YF Initiative Program. YF Focal Point. SED/PED/HSE WHO/HQ Switzerland.
- From August 2005 at March 2006: Medical Officer in the Leishmaniasis Control Program, Geneva. WHO/HQ. Contributing to built the WHO Leishmanisis Program in the context of innovation and intensified disease management. CDS/CPE WHO/HQ Switzerland.
- September 2001-July 2005: Medical Officer in the Lymphatic Filariasis Elimination Programme, Geneva. WHO/HQ, Programme activities implementation, ,Monitoring and Evaluation, focal point for the DEC-salt programme in PELF. CDS/CPE/CEE WHO/HQ Switzerland.
- September 2000-August 2001: Emergency Preparedness Program, PED advisor in Tegucigalpa, Honduras. PAHO/WHO Switzerland.
- Jun 2000-August 2000: Regional advisor for cholera control. WPRO/WHO Philippines.
- October 1999-April 2000: Regional Advisor in the Preparedness Emergency Programme (PED) for 10 countries in South America. PAHO/WHO Ecuador.
- May 1999-August 1999: Medical Co-ordinator for UNHCR for the refugees camps in Albania. Evaluation and coordination medical activities in Kosovo. UNHCR Albania and Kosovo.
- June 1997-May 1998: Epidemiologist in emergency problems. Preparedness and response to epidemics. Participation to installation of a Rapid Alert System. Evaluation of Health System in DRC. EHA/WHO/HQ Democratic Republic of Congo (DRC).
- May 1996-October 1996: Epidemiologist and Emergency medical coordinator for WHO, secondment to UCAH (Humanitarian Assistance Coordination Unit). WHO responsible of trypanosomiasis (sleep-sickness) programme. EHA/WHO/HQ Angola.
- March 1995-January 1996: Epidemiologist of refugees camps and National Level. Control diseases, especially the diarrhoeal diseases control programme (CDR/IRA). Functions of emergency medical coordinator for UNHCR. EHA/WHO/HQ Burundi.
NGOs Experience:
- September 1994-February 1995: Medical coordinator - MSF-F « Doctors without Borders ». Gikongoro, Rwanda. Follow-up of Epidemiological Surveillance System at the refugees camps. Response to epidemics (meningitis, measles, dysentery) , training of the staff.
- March 1994-June 1994: Consultant in malnutrition problems - MSF-F « Doctors without Borders ». Kirundo, Burundi. Prevention Control and Response of dysentery, measles.
- October 1993-December 1993: Medical coordinator - MDM « Doctors of the World ». Benguela, Angola. Evaluation and reorganization of paediatrics department in Benguela Hospital. Creation of oral rehydration unit and malnutrition complexity unit. Evaluation and Response of main mortality causes.
- March 1992-August 1993: MDM « Doctors of the World ». Montevideo, Uruguay. Medical Coordinator and Adviser of the Montevideo Municipal team for the elaboration of primary public health training programme (Maternal-childhood orientation).
- October 1991-February 1992: EDC « Enfants et Développement ». Phnom Penh, Cambodia. Evaluation of primary public health community programmes. Personnel training in the diarrhoeal diseases’ treatment, creation of an oral rehydration unit.
Hospital Experience:
- July 1991-September 1991: Medical assistant at gastroenterology department, Nantes Universitary Hospital, France.
- May 1989-November 1990: Medical assistant in Research Laboratory of Laser in digestive endoscopies. Nantes Universitary Hospital, France.
- November 1987-October 1988: Medical resident, Department of Hepathology Saint Antoine’s Hospital, Paris.
- January 1985-October 1987: Medical resident in Gastroenterology, Nantes Universitary Hospital, France.
Others experiences:
- December 1983-January 1984: Credit Bank in Peru. General practitioner.
- March 1983-November 1983: General medical practitioner.
International Publications:
- Hamlet A, Jean K, Yactayo S, Benzler J, Cibrelus L, Ferguson N, Garske T. POLICI: A web application for visualising and extracting yellow fever vaccination coverage in Africa. Vaccine. 37(11):1384-1388. 2019.
- Niedrig M, Patel P, El Wahed AA, Schädler R, Yactayo S. Find the right sample: A study on the versatility of saliva and urine samples for the diagnosis of emerging viruses. BMC Infect Dis. 29;18(1):707. 2018
- Mengesha Tsegaye M, Beyene B, Ayele W, Abebe A, Tareke I, Sall A, Yactayo S, Shibeshi ME, Staples E, Belay D, Lilay A, Alemu A, Alemu E, Kume A, H/Mariam A, Ronveaux O, Tefera M, Kassa W, Bekele Weyessa A, Jima D, Kebede A, Tayachew A. Sero-prevalence of yellow fever and related Flavi viruses in Ethiopia: a public health perspective. BMC Public Health. 18(1):1011. 2018.
- Hamlet A, Jean K, Perea W, Yactayo S, Biey J, Van Kerkhove M, Ferguson N, Garske T. The seasonal influence of climate and environment on yellow fever transmission across Africa. PLoS Negl Trop Dis. 12(3):e0006284. 2018.
- Shearer FM, Longbottom J, Browne AJ, Pigott DM, Brady OJ, Kraemer MUG, Marinho F, Yactayo S, de Araújo VEM, da Nóbrega AA, Fullman N, Ray SE, Mosser JF, Stanaway JD, Lim SS, Reiner RC Jr, Moyes CL, Hay SI, Golding N. Existing and potential infection risk zones of yellow fever worldwide: a modelling analysis. Lancet Glob Health. 6(3): e270-e278. 2018.
- Godaert L, Najioullah F, Bartholet S, Colas S, Yactayo S, Cabié A, Fanon JL, Césaire R, Dramé M. Atypical Clinical Presentations of Acute Phase Chikungunya Virus Infection in Older Adults. J Am Geriatr Soc. 65(11):2510-2515. 2017.
- Shearer FM, Moyes CL, Pigott DM, Brady OJ, Marinho F, Deshpande A, Longbottom J, Browne AJ, Kraemer MUG, O'Reilly KM, Hombach J, Yactayo S, de Araújo VEM, da Nóbrega AA, Mosser JF, Stanaway JD, Lim SS, Hay SI, Golding N, Reiner RC Jr. Global yellow fever vaccination coverage from 1970 to 2016: an adjusted retrospective analysis. Lancet Infect Dis. 17(11):1209-1217. 2017.
- Graham BS, Repik PM, Yactayo S. Chikungunya in the Americas: Recommendations and Conclusions. J Infect Dis. 214(suppl 5): S510-S513. 2016.
- Diallo M, Dia I, Diallo D, Diagne CT, Ba Y, Yactayo S. Perspectives and Challenges in Entomological Risk Assessment and Vector Control of Chikungunya. J Infect Dis. 214(suppl 5):S459-S465. 2016.
- Yactayo S, Staples JE, Millot V, Cibrelus L, Ramon-Pardo P. Epidemiology of Chikungunya in the Americas. J Infect Dis. 214(suppl 5):S441-S445. 2016.
- Staples JE, Diallo M, Janusz KB, Manengu C, Lewis RF, Perea W, Yactayo S, Sall AA; RCA Risk Assessment Team. Yellow fever risk assessment in the Central African Republic. Trans R Soc Trop Med Hyg. 2014;108(10):608-15.
- Garske T, Van Kerkhove MD, Yactayo S, Ronveaux O, Lewis RF, Staples JE, Perea W, Ferguson NM; Yellow Fever Expert Committee. Yellow Fever in Africa: estimating the burden of disease and impact of mass vaccination from outbreak and serological data. PLoS Med. 11(5):e1001638. 2014.
- Rafferty E, Duclos P, Yactayo S, Schuster M. Risk of yellow fever vaccine-associated viscerotropic disease among the elderly: a systematic review. Vaccine. 31(49):5798-805. 2013.
- Gotuzzo E, Yactayo S, Córdova E. Efficacy and duration of immunity after yellow fever vaccination: systematic review on the need for a booster every 10 years. Am J Trop Med Hyg. 89(3):434-44. 2013.
- Breugelmans JG, Lewis RF, Agbenu E, Veit O, Jackson D, Domingo C, Böthe M, Perea W, Niedrig M, Gessner BD, Yactayo S; YF AEFI group. Adverse events following yellow fever preventive vaccination campaigns in eight African countries from 2007 to 2010. Vaccine. 31(14):1819-29. 2013.
- Sidibe M, Yactayo S, Kalle A, Sall AA, Sow S, Ndoutabe M, Perea W, Avokey F, Lewis RF, Veit O. Immunogenicity and safety of yellow fever vaccine among 115 HIV-infected patients after a preventive immunisation campaign in Mali. Trans R Soc Trop Med Hyg. 106(7):437-44. 2012
- Domingo C, Yactayo S, Agbenu E, Demanou M, Schulz AR, Daskalow K, Niedrig M. Detection of yellow fever 17D genome in urine. J Clin Microbiol. 49(2):760-2. 2011.
- Yaméogo TM, Breugelmans JG, Kambou JL, Badolo O, Tiendrebéogo S, Traoré E, Avokey F, Yactayo S. [Surveillance system for adverse events following immunization against yellow fever in Burkina Faso in 2008. Good practice recommendations]. Med Trop. 69(4):320-1. 2009
- Briand S, Beresniak A, Nguyen T, Yonli T, Duru G, Kambire C, Perea W; Yellow Fever Risk Assessment Group (YF-RAG). Assessment of yellow fever epidemic risk: an original multi-criteria modeling approach. PLoS Negl Trop Dis. 14;3(7):e483. 2009.
- Alvar J, Yactayo S and Bern C. Leishmaniasis and Poverty. Trends Parasitology. 22(12) : 552-557. 2006
- Yactayo S. Faut-t-il définir différemment la santé en épidémiologie d’urgence ? . Revue Prévenir. 30(2) 1996.
- Foultier MT; Patrice T; Yactayo S; Lajat Y; Resche F. Photodynamic treatment of normal endothelial cells or glioma cells in vitro. Surg Neurol Feb;37(2):83-8. 1992.
- Yactayo S, Patrice T, Foultier MT, Xu X. Influence de la gastrine et des prostaglandines E2 sur la croissance de cellules cancéreuses coliques. Gastroenterol Clin Biol 15 : 519-165, 1991.
- Foultier MT; Patrice T; Tanielian C; Wolff C; Yactayo S; Berrada A; Combre A. Photosensitization of L1210 leukaemic cells by argon laser irradiation after incubation with haematoporphyrin derivative and rhodamine 123. J Photochem Photobiol B Jul;10(1-2):119-32, 1991.
- Patrice T, Foultier MT, Yactayo S, Douet MC, Maloisel F, Le Bodic L. Endoscopic photodynamic therapy with hematoporphyrin derivative in gastroenterology. J of Photochemestry and Photobiology 6 : 157-165, 1990.
- Patrice T, Foultier MT, Yactayo S, Adam F, Galmiche JP, Douet MC, Le Bodic L. Endoscopic photodynamic therapy for the primary treatment of gastrointestinal neoplasm in inoperable patients. Dig Dis Sci 35 (5) : 545-552, 1990.
International Communications:
- Yactayo S. Multiples communication in Yellow Fever and Chikungunya. 2006-2017
- Biswas G, Kumaraswami V, Rio F, Yactayo S and Nevio Zagaria Towards elimination of Lymphatic Filariasis: Future Challenges. The European Congress on Tropical Medicine and International Health. Lisbon-Portugal. 08 November 2002
- Foultier MT, Patrice T, Yactayo S, Xu X, Berrada A. Influence de l’analogue de la PGE1 Misoprostol sur l’adhésivité des cellules tumorales coliques sur le plastique et sur endothélium humain. Journées Francophones de Pathologie Digestive. Montpellier-Le Corum 16-20 mars 1991.
- Patrice T, Foultier MT, Yactayo S, Leguennec A, Berrada A, Le Bodic L. Facteurs pronostics lors de la photocoagulation par laser Nd-YAG per-endoscopique des angiomes du tube digestive. Journées Francophones de Pathologie Digestive. Montpellier-Le Corum 16-20 mars 1991.
- Yactayo S, Fiche M, Patrice T, Foultier MT, Menegalli D, Resche F, Cuillère P, Laja Y. Glioblastoma DNA content and growth kinetics in cell culture. 9TH European Congress on Neurosurgery. Moscow. USSR 23-28 Juin 1991.
- Yactayo S, Laja Y, Patrice T, Foultier MT, Menegalli D, Resche F, Cuillère P, Fiche M. Glioblastoma cells adhesivity on endothelial cells monolayers 9TH European Congress on Neurosurgery. Moscow. USSR 23-28 Juin 1991.
- Yactayo S, Patrice T, Foultier MT, Le Bodic L. Stimulation de croissance par la gastrine de cellules néoplasiques coliques. Journées Francophones de Pathologie Digestive. Paris 24-28 mars 1990.
- Foultier MT, Patrice T, Yactayo S, Le Bodic L. Régulation de croissance des cellules endothéliales ou néoplasiques par PGE1 de synthèse misoprostol ou l’indométacine. Journées Francophones de Pathologie Digestive. Paris 24-28 mars 1990.
- Patrice T, Foultier T, Yactayo S, Le Bodic L. Stimulation de cellules cancéreuses coliques par des cellules endothéliales normales. Journées Francophones de Pathologie Digestive. Paris 24-28 mars 1990.
- Patrice T, Foultier T, Yactayo S, Le Bodic L. Photochimiothérapie laser par endoscopie de 69 cancers digestifs. Journées Francophones de Pathologie Digestive. Paris 24-28 mars 1990.
- Yactayo S, Laja Y, Patrice T, Foultier MT, Menegalli D, Resche F, Cuillère P, Fiche M. Adhesivity on endothelium or plastic of glioma cells in primary culture. International Symposium on Advances in Neuro-Oncologie. Sanremo (Italy) 26-29 septembre 1990.
- Yactayo S, Fiche M, Patrice T, Foultier MT, Menegalli D, Resche F, Cuillère P, Robillard N, Lajat Y. Ploidy in astrocytomas before and after in vitro culture. International Symposium on Advances in Neuro-Oncologie. Sanremo (Italy) 26-29 septembre 1990.
