Title/Qualifications: Dr.
Department/Unit/Section: Community Health and Epidemiology
Contact Address: P.O. Box 43844-00100 Nairobi, Kenya.
Position: Senior Lecturer
Area of Specialization: Epidemiology/Community Health
Research Interests: Epidemiology, Disease Control, Public/Community Health, Health services Management, Environmental Health, Environmental Audit & Impact Assessment and M & Es

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Research Interests:

  • Sexual and Gender-Based Violence
  • Sexual and Reproductive Health
  • Climate Change and Health
  • Maternal, Neonatal and Child Health
  • Community/Public Health
  • Environmental Impact Assessment
  • Environmental Health
  • Environmental Audit
  • Project/Programme Monitoring and Evaluation
  • Health Education and Promotion including Behaviour Change Communication
  • Public Health-oriented Curriculum Development and Review
  • Public Health Oriented Strategic Plan
  • Health Services Management

RESEARCH PUBLICATIONS

Referred Journals

  • Nyang’echi, E. N., & Osero, J. O. S. (2024). Assessing the accessibility of sexual reproductive health services among adolescents and young people living with HIV/AIDS in Kenya. International Journal Of Community Medicine and Public Health11(2), 725–732. https://doi.org/10.18203/2394-6040.ijcmph20240260
  • Osero Justus O.S (2023). Harmful Practices Related to Sexual and Reproductive Health Rights Affecting Young People Living with HIV/AIDS in Kenya. Journal of Health, Medicine and Nursing, ISSN 2422-8419. Vol. 112 (2023). DOI: 10.7176/JHMN/112-04. https://iiste.org/Journals/index.php/JHMN/article/view/61901
  • Makokha Violet, Osero Justus, and Mary Muiruri (2023). Factors Associated with Uptake of Enhanced Adherence Counseling among Viremic Adolescents in Nairobi County, Kenya. International Journal of Science and Research (IJSR), Volume 12 Issue 4, April 2023, ijsr.net, DOI: 10.21275/SR23405104400
  • Delvin Kwamboka Nyasani, Onyambu Meshack Ondora, Laura Lusike Lunani, Geoffrey Oino Ombati, Elizabeth Mueni Mutisya, Gaundensia Nzembi Mutua, Matt. A. Price, Justus Osano Osero (2023). Sexually transmitted infection knowledge among men who have sex with men in Nairobi, Kenya. PLoS ONE 18(9): e0281793. https://doi.org/ 10.1371/journal.pone.0281793
  • Banda, Tikulirekuti, Edward Sibeene, Innocent Chansa, Steven Miti, Joseph Zulu, Owaka Isaac Ogweno, Edna Nyanchama Nyang’echi, Dennis Muya, and Justus Osano (2023). Assessing unmet Sexual and Reproductive Health needs of adolescents living with disabilities in Zambia: A cross-sectional study.Population Medicine 5 no. Supplement (2023): A1148. doi:10.18332/popmed/164343.
  • Dennis Oroo Mwambi, Justus O. S. Osero, Isaac Mwanzo and Solomon Cheboi (2022). Accessibility to Integrated Community Case Management of Childhood Pneumonia Services among Caregivers in Kisii County, Kenya. Journal of Advances in Medicine and Medical Research, 34(22): 466-473, 2022; Article no.JAMMR.92475. ISSN: 2456-8899
  • Smythe, E., Kabiru, E., & Osero, J. (2022). An assessment of knowledge, utilization, and perceptions on antenatal care services among women in Nimba County, Liberia. Journal of Medicine, Nursing & Public Health, 5(2), 39-51. https://doi.org/10.53819/81018102t6021
  • Muma B. M., Osero J. O., and Kanini M. C., (2022). Risk factors associated with the prevalence of Helicobacter pylori among community members in Kibwezi West Sub-County, Makueni County. International Journal of Community Medicine and Public Health. DOI: https://dx.doi.org/10.18203/2394-6040.ijcmph20221220
  • Kiragu N. C, Osero J.O S., Anthony K W. (2022). Mobile phone use among mothers seeking postnatal services in Kakamega County, Kenya. African Journal of Midwifery and Women's Health Vol. 16, No. 2. https://doi.org/10.12968/ajmw.2020.0051
  • Maraga Edith K., Osero Justus O., and Dimba Elizabeth. (2022). Clinical Significance of Oral Health-Related Quality of Life for Oral Cancer Patients: A Systematic Review. Oral Health Dental Sci. 2022; 6(1); 1-6.
  • Onesmus Mugo, Justus O. S. Osero, (2022). Eunice Chomi, Mary G. Muiruri, Peter Kamau, (2021). Risk factors associated with the development of congestive heart failure among hypertensive patients attending selected health facilities in Kiambu County, Kenya. Int J Community Med Public Health. 2022 Jan;9(1):45-50, http://www.ijcmph.com
  • Nyangechi E., and Osero J. (2021). Effects of Mobile Health Technologies on Uptake of Routine Growth Monitoring among Caregivers of Children Aged 9 to 18 Months in Kenya. Sage, Journal of Primary Care & Community Health Volume 12: 1–9. https://doi.org/10.1177/21501327211010995
  • Kiragu C, Osero J.S.O, Wanyoro AK. (2021). Factors influencing women’s knowledge at scheduled postnatal visits: a multi-centre study in Kakamega, Kenya. African Journal of Midwifery and Women’s Health. 2021. https://doi.org/10.12968/ ajmw.2020.0044
  • Kapterit D. J., Osero J.O.S, and Mawenzi R. L. (2021). Socio-Demographic and Economic Factors Affecting the Prevalence of MDR TB among Tuberculosis Patients in Baringo County. Journal of Public Health 3(6) September, 2021. targetjournals.com
  • Mutiso J., Osero J. and Chomi E., (2021). HIV-1 Diagnosis Disclosure to Infected Children on Antiretroviral Therapy in Kenya: Prevalence, Correlates and Caregivers’ Perspectives. East African Medical Journal Vol. 98 No. 9 September 2021
  • Kolongei, K. T., Osero Justus O. S., Gachau G. A. (2020). Patterns and Correlates of Substance Use: Cross-Sectional Exploratory Study among Health Care Workers in Bungoma County, Kenya. Research square. DOI: 10.21203/rs.3.rs-15770/v1
  • Djounfoune A. G., Osero O.S. J., Kabiru W. E. (2020). Factors influencing diarrheal prevalence among children under five years in Mathare Informal Settlement, Nairobi, Kenya. Licensee PAGEPress, Italy. Journal of Public Health in Africa 2020; 11:1312 doi:10.4081/jphia.2020.1312
  • Mutuku J. N, Ochola S, Osero J. (2020). Maternal Knowledge and Complementary Feeding Practices and their Relationship with Nutritional Status Among Children 6-23 Months Old in Pastoral Community of Marsabit County, Kenya: A Cross-Sectional Study. Curr Res Nutr Food Sci 2020; 8(3). https://bit.ly/3lk9Yut
  • Justus O. S. Osero (2020). Caregivers’ Knowledge on Routine Growth Monitoring of Children Aged 9 Months in Nyamira County, Kenya. Journal of Health, Medicine and Nursing, iiste.org, ISSN 2422-8419, Vol.72, 2020 DOI: 10.7176/JHMN/72-05
  • Jane Karicha, Justus Osero, Stanley Kimuhu, (2020). Pneumococcal Immunisation Coverage Among Infants Between 4-12 Months in Nyamira County, Kenya. Journal of Natural Sciences Research. 11, No.22, 2020. www.iiste.org. ISSN 2224-3186 (Paper) ISSN 2225-0921
  • Kanario Jane, Osero Justus, Warutere Peterson, Migiro Victor, (2020). Types and distribution of occupational injuries among solid waste collectors in Nairobi city county, Kenya. International Journal of Medicine Research, Volume 5; Issue 1; 2020; Page No. 117-123.
  • Edna Nyanchama Nyang’echi, Andre Yitambe, Kenneth Kibaraa Rucha, Justus O. S. Osero (2020). Uptake of routine growth monitoring among children under 9 months in Nyamira County, Kenya. Int J Community Med Public Health. 2020 Jan;7(1):22-27; http://www.ijcmph.com
  • Theresa Odero, Osero Justus, Kabiru Ephantus, Elisabeth Faxelid, Marlene Makenzius, Monica Oguttu.(2019). Task Shifting/Sharing on Contraceptive Counselling Services between Midwives and Physicians A Randomized Control Trial in Kisumu County, Kenya. African Journal of Health Sciences Volume 32, Issue No. 5, September - October 2019
  • Theresa Mary Awour Odero, Osero Justus, Kabiru Ephantus, Monica Oguttu, Elisabeth Faxelid, Marlene Makenzius (2019). Post Abortion Women’s Perception on Contraceptive Counselling Provided by Service Providers. J. Health Sci. 2019 32(2)
  • Jackline M. Nyaberi, Otieno G. Ochieng, Osero O.S. Justus (2019). The relationship of socio demographic, economic factors among postnatal women with status of Free Maternal Services Implementation in Public Hospitals in Nyanza, Kenya. International Journal of Scientific and Research Publications, Volume 9, Issue 10, October 2019 707, ISSN 2250-3153
  • Tom Marwa, Sarah Karanja, Justus Osero, Alloys Orago (2019). The effects of HIV self-testing kits in increasing uptake of male partner testing among pregnant women attending antenatal clinics in Kenya: a randomized controlled trial. The Pan African Medical Journal. 2019;33:213. doi:10.11604/pamj.2019.33.213.14160
  • Reuben Kebati; Ramadhan L. Mawenzi and Osero Justus (2019). Status of healthcare waste management in small and medium sized healthcare facilities in Nakuru East Sub County, Kenya. International Journal of Community Medicine and Public Health | October 2019 | Vol 6 | Issue 10 Page 4187
  • Osero S. O. Justus; Margaret N. Keraka and Syprine A. Otieno (2019). Health Implications of Sexual Violence Among Survivors in Selected Health Facilities in Kenya: Are There Gender Disparities? Journal of Health, Medicine and Nursing. ISSN 2422-8419, DOI: 10.7176/JHMN, Vol.66, 2019
  • Munguti Catherine Muthingu, Justus O. S. Osero & Dr. Eunice Chomi (2018). The Perceptions of Women of Reproductive Age towards the Uptake of Focused Antenatal Care Services in Nakuru County, Kenya. Stratford Peer Reviewed Journals and Book Publishing. Journal of Medicine, Nursing & Public Health. Volume 1||Issue 2||Page 50-67||December||2018|
  • Omwono Masta; Justus O. Osero; Alloys S.S. Orago; Taratisio Ndwiga, Rose Nyanchama Orure (2018). Levels of ITNs Use among the Jaggery and Tea workers in the prevention of Malaria in South Mugirango Sub-County, Kisii County, Kenya. IOSR Journal of Nursing and Health Science (IOSR-JNHS) e- ISSN: 2320–1959.p- ISSN: 2320–1940 Volume 7, Issue 2 Ver. III (Mar-Apr .2018), PP 72-79
  • Omwono Masta; Justus O. Osero; Alloys S.S. Orago; Taratisio Ndwiga (2018). Factors Influencing The use of ITNs Among the Jaggery and Tea Workers in the Prevention of Malaria in South mugirango Sub - county, Kisii county, Kenya. IOSR Journal of Nursing and Health Science (IOSR-JNHS) e-ISSN: 2320–1959.p- ISSN: 2320–1940 Volume 7, Issue 1 Ver. VII. (Jan.- Feb .2018), PP 61-68
  • Omwono Masta; Justus O. Osero; Alloys S.S. Orago; Taratisio Ndwiga (2018). Jaggery and Tea Workers Perceptions on the Use of ITNs in Prevention of Malaria in South Mugirango Sub- County, Kisii County, Kenya. World Journal of Public Health 2018; 3(1): 1-8 http://www.sciencepublishinggroup.com/j/wjph doi: 10.11648/j.wjph.20180301.11
  • Omwono Masta; Justus O. Osero; Alloys S.S. Orago; Taratisio Ndwiga (2017). Level of Knowledge among the Jaggery and Tea Workers on ITNs Use in Malaria Prevention in South Mugirango Sub - County, Kisii County, Kenya. Human, 2017; vol.8(1): 87-103
  • Osero J. O. S.; David Onchong’a (2017). Type and Magnitude of drug and substance abuse among Samburu Youths in Samburu County, Kenya. Asian J. Pharm.Hea. Jul-Sept 2017/vol-7/Issue 3
  • Justus O. S. Osero; Edna. N. Nyang’echi; Eunice W. Kimani (2017). Perpetrators of Sexual Violence among Adolescent Girls in Secondary Schools in Kenya. A Case of Mixed and Day Secondary Schools in Kiambu County. IJIRK, Vol. 2 Issue 10, October 2017, pg 78-85
  • Justus O. S. Osero; Farhia Abdiaziz Sh.Hussien; Edna. N. Nyang’echi (2017). Nutritional Status of Children (6-59 Months) In Camps of Internally Displaced Persons in Wadajir District, Mogadishu, Somalia. IJIRK, Vol. 2 Issue 10, October 2017, pg 56-65
  • Nyangasi M. F., Osero J., Gichangi P., (2017). Determinants of delay in seeking Medical Care among Women with Invasive Cervical Cancer in Western Kenya. International Journal of current Innovation Research, Vol. 3, Isssue 10, October 2017, pp 830-836.
  • Nyang’echi E. N, and Osero J. S. O. (2017). Motivational Strategies Used among Nurses in Nyamira County, Kenya. IJIRK, Vol. 2 Issue 9, Sept.2017, pg150-159.
  • Marwa T, Karanja S, Osero J, and Orago A., (2017). A Qualitative Study of Drivers and Barriers to the Utilization of HIV Self-Testing Services among ANC Mothers in Kenya. IJIRK, Vol. 2 Issue 9, Sept.2017, pg12-22.
  • Makori R., Nyamongo D., Mutai J., and Osero J., (2017). Effects of training on men’s Attitude Towards Home-based Care Practices for People Living with HIV and Aids in Kisii County, Kenya. Research journal’s Journal of Public Health Vol. 3 No.7 September 2017, pp 1-11.
  • (2016). Factors increasing vulnerability to sexual violence of adolescent girls in Limuru sub-county, Kenya. African Journal Of Midwifery And Women’s Health, October–December 2016, Vol 10, No 4
  • Akolo M; Gichuki R; Chitwa M; Kimani J and Osero J., (2016). Compliance to Positive Health, Dignity and Prevention Services among HIV Infected Index Partners in HIV Sero-Discordant Relationships in Nairobi County, Kenya. J AIDS Clin Res 2016, 7:8
  • James M. Onchong’a; Tom Were; and Justus O.S. Osero (2016). Knowledge, Perception and Level of Male Partner Involvement in Choice of Delivery Site among Couples at Coast Level Five Hospital, Mombasa County, Kenya. African Journal of Reproductive Health; March 2016; Vol. 20(1): Article 8.
  • G. Kiongo; J Wanyoike Gichuhi; J. O. S. Osero; A. Yitambe, (2015). State of disaster preparedness among members of Staff at Kenyatta National Hospital, Nairobi County, Kenya. European International Journal of Science and Technology. June 4 2015, Vol.4 No.5
  • Osero J. O. S., Keraka M.N., and Otieno A.S., (2012). Health consequences of sexual based violence among survivors in selected hospitals in Kenya. Asia Journal of Pharmaceutical and Health Sciences. Jul – Sep 2012, Vol. 2, issue 2 pg. 300.
  • Makori R. K., Onyango R. O., Kakai R. and Osero J. O. S. (2011). Community Attitudes Towards Male Involvement in Home Based Care Activities for People Living with HIV and AIDS in Maseno Division, Western Kenya. Journal of Public Health and Epidemiology Vol. 3(11), pp. 503-512, 16 November, 2011 ISSN 2141-2316 ©2011.
  • Makori RK, Onyango RO, Kakai R, Osero JOS., (2011). Socio-cultural factors influencing male involvement in home-based care for people living with HIV and AIDS in Maseno Division, Western Kenya. East African Medical Journal, Vol 88, No 8 (2011).
  • Osero J. O. S., Otieno M.F., and Orago A.S.S., (2006). Mothers’ knowledge on malaria and vector Management strategies in Nyamira District, Kenya”, East African Medical Journal, Vol.83 No.9 pg 507-514
  • Osero J. O. S., Otieno M.F., and Orago A.S.S., (2006). “The role of child health clinics in promoting the use of Insecticide Treated Nets among children under five years in Nyamira district Kenya”, East African Medical Journal, Vol.83 No.8 pg 450-454.
  • Osero J. O. S., Otieno M.F., and Orago A.S.S., (2005), “Maternal use of Insecticide Treated Nets in the prevention of malaria among children under five years in Nyamira district Kenya”, East African Medical Journal, Vol.82 No.10 pg 495-500.

Refereed Learning Modules

  • Osero Justus O.S (2020). HPH 803 – Health Service Management, Policy and Informatics. Master of Public Health, Department of Community Health and Epidemiology, Kenyatta University
  • Osero Justus O.S (2020). PCH 210 Fundamentals of Environmental Health. BSc Community Health, Department of Community Health and Epidemiology, Kenyatta University

Reviewed Conference Papers

  • Osero Justus and Makokha Violet (2023), Factors associated with uptake of Enhanced Adherence Counseling among Adolescents with HIV viremia in health facilities in Nairobi County, Kenya”, An e-poster at IAS 2023, the 12th IAS Conference on HIV Science, held in Brisbane, Australia, from 23 to 26 July 2023.
  • Osero, Justus O.S. and Nyang’echi Edna N., (2022). Conference Paper “Effects of mhealth on Caregivers’ Knowledge of Routine Growth Monitoring of Children Aged Above 9 Months in Kenya” Health Promotion Conference- Health Systems and Advocacy in Health-Kenyatta University

Consultancy and Project Reports

  • Osero Justus O. S., Edna Nyachama, Faith Mbehero and Ruth Momanyi (2023). Intersections Between Sexual Gender-Based Violence, Unintended Pregnancies, and Unsafe Abortion among Adolescents and Young Women in Kenya. Planned Parenthood Global.
  • Osero Justus O.S.; Tikulirekuti Banda; Edward Sibeene; Innocent Chansa; Steven Miti; Joseph Zulu; Owaka Isaac Ogweno; Edna Nyanchama Nyang’echi; Dennis Muya (2023). Assessing Current Unmet Needs of Sexual Reproductive Health and Rights among Young People Living with Disability and HIV/AIDS in Kenya and Zambia. Hivos, Regional SRHR Fund, Ford Foundation, and Sweden Sverige.
  • Osero Justus O.S. and Edna Nyanchama (2021). Final evaluation of Rescue Dada Centre (RDC) Project 2019 - 2021: “Empowering Street Connected Girls to Realize their Rights”. Rescue Dada Centre, Misereor, KZE, DKA Austria, Foundation Impact Hope and private donors.
  • Osero Justus O.S. (2019). Review, Update and Development of a National Curriculum for Community Based Distribution for Family Planning (CBD FOR FP) – MOH and JSI – inSupply Health
  • Osero Justus O.S. (2018). A Study on the Practice of Supplying Free Family Planning Commodities to None Public Sector in Kenya (National Study). DFID through Palladium - ESHE
  • Osero Justus O.S. (2016). A Healthy Mother, Baby, and Family: Training Manual for Health Workers. Homa-Bay and Migori Counties Kenya, CRS - Kenya
  • Osero Justus O.S. (2016). How to Have a Healthy Baby & Family: Community Engagement Job Aid. Homa-Bay and Migori Counties Kenya, CRS - Kenya
  • Osero Justus O.S. (2015). End of Project Evaluation of Baki Area Rehabilitation Programme Awdal Region, Somaliland. World Vision Somalia.
  • Osero Justus O.S. (2015). Nutrition Causal Analysis (NCA) in South Central Somalia (in Gedo, Hiran, Bay, Bakool, and Benadir). Save the Children, Concern World, ACF, Oxfam, and World Food Programme.
  • Osero Justus O.S. (2015). Assessment of Knowledge, Attitude, and Practice on tuberculosis programme in Somaliland, Puntland, and South & Central. Global Fund and World Vision Somalia
  • Osero Justus O.S. (2013). End Term Evaluation on a Knowledge Attitude and Practice (KAP) assessment for the Communal WASH programme in Maparasha location, Kajiado County. Neighbours Initiative Alliance
  • Osero Justus O.S. (2013). End Term and Formative Evaluations of Ngadakarin Bamocha Maternal Child Health and Social Development Project in Turkana North District Kenya. AMREF

non - Reviewed Conference Paper

  • Osero Justus O.S, Karicha Jane (2022). Factors That Influence Pneumococcal Vaccine Uptake Among Caregivers Of Infants Between 4-12 Months In Borabu Sub County, Nyamira County, Kenya Health Promotion Conference- Health Systems and Advocacy in Health-Kenyatta University
  • Osero Justus O.S; Isaac Owaka; Dennis Muya; Tikulirekuti Banda; Innocent Chansa; Edward Sibeene; Steven Miti; Edna Nyanchama (2023). Harmful Practices Related to Sexual and Reproductive Health Rights Affecting Young People Living With HIV/AIDS in Kenya. 6th AfIHC August 2023 at Kenyatta University, Kenya.

Editorship of Conference Proceedings

  • Chairman of International Conference: 6th Africa Interdisciplinary Health Conference on Mitigating Pandemics, Climate Change & Chronic Diseases in Africa: the Role of Interdisciplinary Collaboration held in Kenyatta University from August 9 - 11, 2023. It attracted over 170 participants Globally.
  • Moderated the 6th International Multidisciplinary Research Conference on “Leveraging on Research and Innovations for Effective Solutions” from August 12 – 14, 2023.
  • Moderated the 5th International Multidisciplinary Research Conference on “Sustainability in the Era of Covid-19 Pandemic” at Gretsa University from November 21 – 22, 2022
  • Organized and Facilitated International Conference: Promoting Health during and beyond COVID-19. Collaboration between Kenyatta University and the Ministry of Health from April 12 – 14. 2022.
  • Moderated the 4th International Multidisciplinary Research Conference on “Sustainability in the Era of Covid-19 Pandemic” at Gretsa University from November 8 – 9, 2021
  • Facilitated Kenya MOH Workshop on Community Based Distributors for Family Planning curriculum Review, update, and development at Waterbuck Hotel Nakuru, from June 17 -21, 2019.
  • Moderated the 2nd International Multidisciplinary Research Conference on “Addressing Contemporary Societal and Organizational Challenges” at Gretsa University from November 5 – 6, 2018.

Scholarly Presentations at Conferences/Workshops/Seminars

  • Osero Justus O.S; Isaac Owaka; Dennis Muya; Tikulirekuti Banda; Innocent Chansa; Edward Sibeene; Steven Miti; Edna Nyanchama (2023). Harmful Practices Related to Sexual and Reproductive Health Rights Affecting Young People Living With HIV/AIDS in Kenya. 6th AfIHC August 2023 at Kenyatta University, Kenya.
  • Osero Justus and Makokha Violet (2023), Factors associated with uptake of Enhanced Adherence Counseling among Adolescents with HIV viremia in health facilities in Nairobi County, Kenya. IAS 2023 in Brisbane, Australia, from 23 to 26 July 2023
  • Osero Justus O.S., Edna Nyanchama, Faith Mbehero (2023). Ruth Momanyi3Intersections Between Defilement/Rape, Unintended Pregnancies and Unsafe Abortions Among Adolescent Girls and Young Women in Kenya. 6th AfIHC August 2023 at Kenyatta University, Kenya.
  • Nyang’echi Edna N., and Osero, Justus O.S. (2022). Conference Paper “Effects of mhealth on Caregivers’ Knowledge on Routine Growth Monitoring of Children Aged Above 9 Months in Kenya” Health Promotion Conference- Health Systems and Advocacy in Health-Kenyatta University
  • Facilitated Review, update and development of Community-Based Distributors for Family Planning curriculum (MOH Curriculum) - May 2019 to July 2019.
  • Participated in the Development of CBFP Training Package for Kilifi Pilot Project on Reproductive & Maternal Health Services (MOH Curriculum) - August 2018
  • Facilitated review of hygiene and IYCF curricula for community health workers in the CRS THRIVE Project (CRS Project Curriculum) - June 2016