Title/Qualifications: Dr/PhD
Department/Unit/Section:
Medical Laboratory Science
Contact Address:
34556-00100 Nairobi
Position:
Lecturer

Google Scholar- https://scholar.google.com/citations?user=02U5ycgAAAAJ&hl=en

ORCID ID- https://orcid.org/0000-0001-5428-9565


Download Full CV

Area of Specialization: Medical Virology
Research Interests:
Molecular epidemiology and evolution of viruses, Viral oncogenesis

Publications

Referred Journals

  • Festus Mulakoli., George Gachara., Eric Ndombi., Samoel Khamadi. (2023) Dengue Virus and Blood Safety: A Mini-Review of Research Publications. East African Science, 5, 1-7.
  • Schlosser-Brandenburg, J., Midha, A., Mugo, R.M., Ndombi, E.M., Gachara, G., Njomo, D., Rausch, S. and Hartmann, S. (2023) Infection with soil-transmitted helminths and their impact on coinfections. Frontiers in Parasitology, 2.
  • Ambala, P., Fatima, H., Samson, M., Gachara, G., Nelson, M., Lindsey, M. S., Megan, V., Susan, M., Marc, V., Dawn, Z., and Joseph, K. (2022) Absence of molecular evidence of filovirus circulating in bats and rodents in Laikipia North sub-County, Kenya: a cross sectional study, Pan African Medical Journal-One Health. 2022;7:34.
  • Anjorin, AbdulAzeez Adeyemi, Ismail A. Odetokun, Jean Baptiste Nyandwi, Hager Elnadi, Kwame Sherrif Awiagah, Joseph Eyedo, Ajibola Ibraheem Abioye, George Gachara, Aala MohmedOsman Maisara, Youssef Razouqi, Mohamed Farah Yusuf Mohamud, Zuhal Ebrahim Mhgoob, Tunde Ajayi, Lazare Ntirenganya, Morounke Saibu, Babatunde Lawal Salako, Nusirat Elelu, Kikelomo Ololade Wright, Folorunso O. Fasina, and Rasha Mosbah. "Public Health Surveillance for Adverse Events Following Covid-19 Vaccination in Africa." Vaccines 10, no. 4 (2022): 546
  • Wangui, J., J. Nokes, G. Gachara, C. Agoti, J. Ngeranwa, and W. Bulimo. "Evolution and transmission of Human Respiratory Syncytial Virus Group A (HRSVA) across Kenya from 2007-2010." International Journal of Infectious Diseases 116 (2022): S93-S94
  • Bahati, Vincent, Wallace Bulimo, and George Gachara. "Comparative Seroprevalence of Hepatitis B Virus among in-Mates and Low Risk Voluntary Blood Donors in Garissa, Kenya." Journal of Biosciences and Medicines 9, no. 7 (2021): 85-95.
  • Fardolo, Ezekiel Kanue, Wallace Bulimo, Patrick Okoti Aluora, and George Gachara. "Seroprevalence of Hepatitis E Virus among Voluntary Blood Donors in Nairobi County, Kenya: A Pilot Study." Journal of Biosciences and Medicines 8, no. 12 (2020): 78.
  • Aluora, P.O., Muturi, M.W. & Gachara, G. Seroprevalence and genotypic characterization of HBV among low risk voluntary blood donors in Nairobi, Kenya. Virol J 17, 176 (2020).
  • Jepkemei, K. B.; Ochwoto, M.; Swidinsky, K.; Day, J.; Gebrebrhan, H.; McKinnon, L. R.; Andonov, A.; Oyugi, J.; Kimani, J.; Gachara, G.; Songok, E. M.; Osiowy, C., Characterization of occult hepatitis B in high-risk populations in Kenya. PLOS ONE 2020, 15 (5)
  • Opanda S, Bulimo W, Gachara G, Ekuttan C, Amukoye E. Assessing antigenic drift and phylogeny of influenza A (H1N1) pdm09 virus in Kenya using HA1 sub-unit of the hemagglutinin gene. PLoS One. 2020;15(2):e0228029.
  • Etta EM, Alayande DP, Mavhandu-Ramarumo LG, Gachara G, Bessong PO. HHV-8 Seroprevalence and Genotype Distribution in Africa, 1998 - 2017: A Systematic Review. Viruses. 2018;10(9).
  • Gachara G, Magoro T, Mavhandu L, Lum E, Kimbi HK, Ndip RN, Bessong P.O.2017 Characterization of occult hepatitis B virus infection among HIV positive patients in Cameroon.AIDS Research and TherapyVol 14(1):11
  • Gachara G, Mavhandu LG, Rogawski ET, Manhaeve C, Bessong PO.2017Evaluating Adherence to Antiretroviral Therapy Using Pharmacy Refill Records in a Rural Treatment Site in South AfricaAids Research and Treatment2017:5456219
  • Magoro T, G Gachara, L Mavhandu, E Lum, H. K Kimbi, R. N Ndip, P. O Bessong.2016Serologic and genotypic characterization of hepatitis B virus in HIV-1 infected patients from South West and Littoral Regions of Cameroon.Virology JournalVol 13:178.
  • Gachara G, Symekher S, Otieno M, Magana J, Opot B, Bulimo W2016 Whole genome characterization of human influenza A(H1N1)pdm09 viruses isolated from Kenya during the 2009 pandemicInfection Genetics and EvolutionVol 40:98-103
  • Milanoi S, Ongus JR, Gachara G, Coldren R, Bulimo W 2016 Serotype and genetic diversity of human rhinovirus strains that circulated in Kenya in 2008 Influenza and Other Respiratory
    Viruses 2016 Doi: 10.1111/irv.12373
  • Hassan, J. A.,G. Gachara,F. Mbugua, J. Muchiri, S. Symekhah, G. Nakitari, P. Borus, T. Kamau, and J. Kombich, 2014, Potency status of oral polio virus vaccine among retrieved field samples in Kenya, International Journal of Infectious Diseases, Vol 21 (2014): 441
  • S. Symekher, G. Gachara, J. Simwa, J. Gichogo, M. Rotich, M. Ng’ayo and J. Magana, 2013, Human Bocavirus Infection in Children with Acute Respiratory Infection in Nairobi, Kenya, Open Journal of Medical Microbiology    Vol. 3 No. 4, 2013, pp. 234-238.
  • Janet Majanja, Rachel Achilla, Rose Njoroge, Sylvanus Mukunzi, Meshack Wadegu, Wallace D. Bulimo, James Njiri, Josphat Mwangi, George Gachara and Eyako K. Wurapa, 2013, Impact of the influenza A(H1N1)pdm09 virus on the circulation dynamics of the seasonal influenza strains in Kenya, American Journal of Tropical Medicine and Hygiene, Vol 88(5), 2013, pp. 940–945
  • Wallace D. Bulimo, George Gachara, Benjamin H. Opot, Margaret W. Murage and Eyako K. Wurapa, 2012, Evidence in Kenya of reassortment between seasonal influenza A(H3N2) and influenza A(H1N1)pdm09 to yield A(H3N2) variants with the matrix gene segment of A(H1N1)pdm09    African Journal of Pharmacology and Therapeutics    Vol. 1 No. 1 Pages 1-7
  • Gachara George, Symekher Samuel, Mbithi John, Simwa James, Ng’ayo Musa, Magana Japheth and Bulimo Wallace., 2011, Amino acid sequence analysis and identification of mutations in the NS gene of 2009 influenza A (H1N1) isolates from Kenya., Virus Genes, ISSN: 0920-8569
  • George Gachara, Wallace Bulimo, Japheth Magana, James Simwa and Samwel Morris Symekher., 2011, Evolutionary Pattern of the Hemagglutinin Gene of Influenza B Viruses isolated in Kenya 2005-2009., African Journal of Health Sciences, Vol 19 No 3-4 (Supplementary): 77

Books and Books Chapters

  • Mulakoli, F., Gachara, G., Ndombi, E., & Khamadi, S. (2022). Dengue Virus Surveillance and Blood Safety: A One Health Perspective. IntechOpen. doi: 10.5772/intechopen.109413

Conference/Workshops/Seminar Papers

Conference Papers

  • McManus KA, Gachara G, Dillingham R, Bessong PO. “One HIV clinic’s experience: Mortality and associations with mortality in people living with HIV initiated on ART in Limpopo, South Africa”. A poster presented during the 19th International Conference on Aids and STI's in Africa (ICASA) held from 3rd – 10th December 2017 at the Sofitel Abidjan Hotel Ivoire, Abidjan, Côte d´Ivoire
  • Gachara, George., Mavhandu, Lufuno., Manhaeve, Cecile, and Bessong, Pascal. Assessing the cascade of HIV diagnosis, care and treatment in a rural South African setting. Poster presentation at the 11th International Conference on HIV Treatment and Prevention Adherence held at Fort Lauderdale, MI, USA, May 9-11, 2016.
  • Gachara, George, Symekher, Samuel., Otieno, M., Magana, Japheth., Opot, B. and Bulimo, Wallace. Origins, molecular epidemiology, and genetic diversity of Influenza A(H1N1)pdm09 virus in Kenya: A Bayesian Coalescent Analysis. Oral Presentation at the 3rd Medical and Veterinary Virus Research in Kenya (MVVR-K) symposium, held at the Hilton Hotel hotel, Nairobi, Kenya, 16th -17th October 2014
  • Gachara, George, Symekher, Samuel., Otieno, M., Magana, Japheth., Opot, B. and Bulimo, Wallace. Evolutionary analyses of influenza A/H1N1pdm virus during the early, peak and late phases of the pandemic in Kenya. Oral Presentation at the 2nd Medical and Veterinary Virus Research in Kenya (MVVR-K) symposium, held at the Sarova Panafric hotel, Nairobi, Kenya, 18th -19th October 2012.
  • M. Kaburu, W. Bulimo, G. Gachara and J. Ongus. Burden of human rhinovirus infections in influenza like illnesses in Kenya. Poster during the 16th International Society for Infectious Diseases held on 2nd-5th April 2014 in Cape Town, South Africa.
  • Gachara, George, Magana, Japheth. , Mbithi, John, Symekher, Samuel and Bulimo, Wallace. Sequence analysis of the Neuraminidase (NA) gene of pandemic H1N1 influenza A virus in Kenya. Poster presentation during the XIV International Symposium on Respiratory Viral Infections held on 23rd – 26ndMarch 2012 at the Grand Hyatt Istanbul, Turkey.
  • Gachara, George, Magana, Japheth., Mbithi, John., Symekher, Samuel and Bulimo, Wallace. Comparison of selection pressures on the Haemagglutinin (HA) gene of pandemic (2009) and seasonal influenza A viruses in Kenya. Poster presentation during the XIV International Symposium on Respiratory Viral Infections held on 23rd – 26ndMarch 2012 at the Grand Hyatt Istanbul, Turkey.
  • Gachara, G, Mbithi, J, Magana, J, Symekher, S and Bulimo, W. The molecular evolution of two internal genes, M & NS in pandemic H1N1 influenza A virus. Poster presentation during the 1st Medical and Veterinary Virus Research in Kenya (MVVR-K) symposium, held at the Silver Springs Hotel, Nairobi; 8-9 September 2011
  • Gachara, SML. Symekher, J. Simwa, and JM Magana. Evolutionary Pattern of the Hemagglutinin Gene of Influenza B Viruses isolated in Kenya 2005-2009. Oral Presentation at the 1st KEMRI annual scientific & health (KASH) conference, 9th -11th February 2011
  • Gachara, G., Symekher, S, Mbithi, J, Simwa, J, Ng’ayo, M., and Bulimo, W. Amino acid sequence analysis and identification of mutations in the NS gene of 2009 influenza A (H1N1) isolates from Kenya. Poster Presentation in the 2nd African National Influenza Surveillance and Epidemiology (ANISE) Conference, Noguchi Institute, Accra, Ghana, 11th – 12th January, 2011.
  • Symekher , S.M.L, Gachara, G., Gikera, C., Simwa, J., and Magana, J. Description of patients positive for Influenza and RSV in a sentinel surveillance site in Nairobi, Kenya. Poster Presentation in the 2nd African National Influenza Surveillance and epidemiology (ANISE) Conference, Noguchi Institute, Accra, Ghana, 11th – 12th January, 2011.
  • Symekher, G. Gachara, J. Simwa, and JM Magana. Prevalence and seasonality of Influenza viruses in Nairobi, Kenya; 2001-2009. Poster Presentation in the 2nd African National Influenza Surveillance and Epidemiology (ANISE) Conference, Noguchi Institute, Accra, Ghana, 11th – 12th January, 2011.
  • Symekher, G. Gachara, J. Simwa, W. Ochieng and JM Magana. Trends of influenza virus isolates in Nairobi Kenya between 2005 – 2006. A poster presentation during the 3rd Annual Makerere University FoM and SPH Scientific Conference 29th -31st August 2007.
  • Gachara, SML. Symekher, and J. Simwa. Comparison of the haemagglutinin gene of influenza B virus isolated in Nairobi with that of the vaccine strain. Poster presentation at the 27th African Health Sciences Congress held in Durban, South Africa on 3rd to 7th December 2006.
  • Gachara, SML. Symekher and J. Simwa, Genetic characterization of influenza viruses isolated in Nairobi, Kenya and their phylogenetic relationship with those isolated recently in Southern Africa. An oral presentation at the 21st Annual Joint Scientific Meeting held at Arusha International Conference Centre, Tanzania on March 7th to 9th 2006.
  • G, SML. Symekher, J. Simwa, and W. Ochieng. Antigenic characterization of influenza viruses isolated in Kenya. An oral presentation at the 21st Annual Joint Scientific Meeting held at Arusha International Conference Centre, Tanzania on March 7th to 9th 2006.

Workshops Papers

Seminar Papers

  • McManus Katie, Gachara George, Dillingham Rebecca, Bessong Pascal. One HIV clinic’s experience: Mortality and associations with mortality in people living with HIV initiated on ART in Limpopo, South Africa. A poster presented during the 19th International Conference on Aids and STI's in Africa (ICASA) held from 3rd – 10th December 2017 at the Sofitel Abidjan Hotel Ivoire, Abidjan, Côte d´Ivoire
  • Gachara, George., Mavhandu, Lufuno., Manhaeve, Cecile, Rogawski, E, and Bessong, Pascal. Evaluating adherence to antiretroviral therapy using pharmacy refill records in a rural treatment site in South Africa. Oral presentation at the International Symposium on Global Health Research in Africa, held at the 2 Ten Hotel, Thohoyandou,          South  Africa, 16-17 March 2017
  • Gachara, George., Mavhandu, Lufuno., Lum, Emmaculate., Kimbi, Helen., Ndip, Roland, and Bessong, Pascal. Serologic and genotypic characterization of hepatitis B virus in HIV-1 infected patients from South West and Littoral Regions of Cameroon. Oral presentation at the International Symposium on Global Health Research in Africa, held at the 2 Ten Hotel, Thohoyandou, South Africa, 16-17 March 2017
  • Gachara, G., Symekher, S, Mbithi, J, Simwa, J, and Bulimo, W. Mutational analysis of the NS gene of pandemic H1N1/09 influenza virus in Kenya An oral presentation at the Kenya Young Scientists (KEYS) Seminar series 4 held at Jumuia guest house, Kisumu Kenya on 22nd October 2010.

Student Co-authored Publications

  • Milanoi S, Ongus JR, Gachara G, Coldren R, Bulimo W: Serotype and genetic diversity of human rhinovirus strains that circulated in Kenya in 2008. Influenza and Other Respiratory Viruses Doi: 10.1111/irv.12373
  • Bahati, Vincent, Wallace Bulimo, and George Gachara. "Comparative Seroprevalence of Hepatitis B Virus among in-Mates and Low Risk Voluntary Blood Donors in Garissa, Kenya." Journal of Biosciences and Medicines 9, no. 7 (2021): 85-95.
  • Fardolo, Ezekiel Kanue, Wallace Bulimo, Patrick Okoti Aluora, and George Gachara. "Seroprevalence of Hepatitis E Virus among Voluntary Blood Donors in Nairobi County, Kenya: A Pilot Study." Journal of Biosciences and Medicines 8, no. 12 (2020): 78.
  • Aluora, P.O., Muturi, M.W. & Gachara, G. Seroprevalence and genotypic characterization of HBV among low risk voluntary blood donors in Nairobi, Kenya. Virol J 17, 176 (2020).
  • Jepkemei, K. B.; Ochwoto, M.; Swidinsky, K.; Day, J.; Gebrebrhan, H.; McKinnon, L. R.; Andonov, A.; Oyugi, J.; Kimani, J.; Gachara, G.; Songok, E. M.; Osiowy, C., Characterization of occult hepatitis B in high-risk populations in Kenya. PLOS ONE 2020, 15 (5)
  • Festus Mulakoli., George Gachara., Eric Ndombi., Samoel Khamadi. (2023) Dengue Virus and Blood Safety: A Mini-Review of Research Publications. East African Science, 5, 1-7.
  • Schlosser-Brandenburg, J., Midha, A., Mugo, R.M., Ndombi, E.M., Gachara, G., Njomo, D., Rausch, S. and Hartmann, S. (2023) Infection with soil-transmitted helminths and their impact on coinfections. Frontiers in Parasitology, 2.
  • Ambala, P., Fatima, H., Samson, M., Gachara, G., Nelson, M., Lindsey, M. S., Megan, V., Susan, M., Marc, V., Dawn, Z., and Joseph, K. (2022) Absence of molecular evidence of filovirus circulating in bats and rodents in Laikipia North sub-County, Kenya: a cross sectional study, Pan African Medical Journal-One Health. 2022;7:34.