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This study analyzed cases reported as suspected ND in Kenya between 2005 and 2015. Of the suspected 332 ND reported cases from the three production systems in 27 locations within six Kenyan Agro-Ecological Zones (AEZs), 140 diagnosed as infected with avian orthoavulavirus 1 (AOaV-1; formerly Newcastle disease virus) were present in every year in all AEZs. The numbers of AOaV-1-positive cases differed significantly (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) between the production systems across the years depending on the season, climate, and location. In the free-range system, both ambient temperatures and season associated significantly (<jats:italic>p<\/jats:italic>\u2009=\u20090.001 and 0.02, respectively) with the number of cases, while in the intensive and caged systems, the positive cases correlated significantly with season and relative humidity, respectively (<jats:italic>p<\/jats:italic>\u2009=\u20090.05). Regardless of the production systems, the numbers of clinically sick birds positively correlated with the ambient temperatures (<jats:italic>r<\/jats:italic>\u2009=\u20090.6;<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). Failure to detect AOaV-1 in 58% of the ND cases reported, and mortalities exceeding the observed numbers of clinically sick birds suggest deficiencies in the current ND reporting and diagnostic system. Intensive farmers were the slowest in reporting the cases and diagnostic deficiencies were most evident by failure to test the exposure of ICs to natural infection with AOaV-1 and for the AOaV-1-negative cases lack of testing for other pathogens and\/or AOaV-1 variants. This study indicates a need for improved surveillance and diagnostics in Kenyan domestic poultry.<\/jats:p>","DOI":"10.1007\/s11250-019-02059-x","type":"journal-article","created":{"date-parts":[[2019,9,10]],"date-time":"2019-09-10T05:22:16Z","timestamp":1568092936000},"page":"699-710","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["A retrospective study of Newcastle disease in Kenya"],"prefix":"10.1007","volume":"52","author":[{"given":"Auleria A.","family":"Apopo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9250-9108","authenticated-orcid":false,"given":"Henry M.","family":"Kariithi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonard O.","family":"Ateya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yatinder S.","family":"Binepal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jane H.","family":"Sirya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas D.","family":"Dulu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Catharine N.","family":"Welch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sonia M.","family":"Hernandez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudio L.","family":"Afonso","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,9,10]]},"reference":[{"issue":"5","key":"2059_CR1","doi-asserted-by":"crossref","first-page":"1033","DOI":"10.1007\/s11250-019-01843-z","volume":"51","author":"AE Absal\u00f3n","year":"2019","unstructured":"Absal\u00f3n, A.E., Cort\u00e9s-Espinosa, D.V., Lucio, E., Miller, P.J. and Afonso, C.L., 2019. 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