Title | Trends and Intensity of Rhinovirus Invasions in Kilifi, Coastal Kenya, Over a 12-Year Period, 2007-2018. | ||
Author | Mwita Morobe, John; Kamau, Everlyn; Murunga, Nickson; Gatua, Winfred; Luka, Martha M; Lewa, Clement; Cheruiyot, Robinson; Mutunga, Martin; Odundo, Calleb; James Nokes, D; Agoti, Charles N | ||
Journal | Open Forum Infect Dis | Publication Year/Month | 2021-Dec |
PMID | 34988244 | PMCID | PMC8694214 |
Affiliation + expend | 1.Epidemiology and Demography Department, KEMRI-Wellcome Trust Research, Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya. | ||
2.Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom. | |||
3.School of Life Sciences and Zeeman Institute for Systems Biology and Infectious Disease Epidemiology Research, University of Warwick, Coventry, United Kingdom. | |||
4.Department of Public Health, Pwani University, Kilifi, Kenya. |
BACKGROUND: Rhinoviruses (RVs) are ubiquitous pathogens and the principal etiological agents of common cold. Despite the high frequency of RV infections, data describing their long-term epidemiological patterns in a defined population remain limited. METHODS: Here, we analyzed 1070 VP4/VP2 genomic region sequences sampled at Kilifi County Hospital on the Kenya coast. The samples were collected between 2007 and 2018 from hospitalized pediatric patients (<60 months of age) with acute respiratory illness. RESULTS: Of 7231 children enrolled, RV was detected in 1497 (20.7%) and VP4/VP2 sequences were recovered from 1070 samples (71.5%). A total of 144 different RV types were identified (67 Rhinovirus A, 18 Rhinovirus B, and 59 Rhinovirus C) and at any month, several types co-circulated with alternating predominance. Within types, multiple genetically divergent variants were observed. Ongoing RV infections through time appeared to be a combination of (1) persistent types (observed up to 7 consecutive months), (2) reintroduced genetically distinct variants, and (3) new invasions (average of 8 new types annually). CONCLUSIONS: Sustained RV presence in the Kilifi community is mainly due to frequent invasion by new types and variants rather than continuous transmission of locally established types/variants.
StrainID | RV Species | Serotype | Length(nt) | Country | Year | Strain Name |
---|---|---|---|---|---|---|
ANC01934 | A | None | 420 | Kenya | 2014 | KEN/Kilifi/HRV/5387/2014-07-23 |
ANC01939 | A | None | 405 | Kenya | 2013 | KEN/Kilifi/HRV/5382/2013-04-23 |
ANC01944 | A | None | 435 | Kenya | 2015 | KEN/Kilifi/HRV/5377/2015-02-07 |
ANC01949 | A | None | 420 | Kenya | 2014 | KEN/Kilifi/HRV/5372/2014-12-02 |
ANC01954 | A | None | 432 | Kenya | 2010 | KEN/Kilifi/HRV/5367/2010-11-10 |
ANC01959 | A | None | 420 | Kenya | 2018 | KEN/Kilifi/HRV/5362/2018-08-19 |
ANC01964 | A | None | 420 | Kenya | 2018 | KEN/Kilifi/HRV/5357/2018-04-02 |
ANC01969 | A | None | 405 | Kenya | 2016 | KEN/Kilifi/HRV/5352/2016-10-14 |
ANC01974 | A | None | 420 | Kenya | 2014 | KEN/Kilifi/HRV/5347/2014-11-06 |
ANC01979 | A | None | 420 | Kenya | 2017 | KEN/Kilifi/HRV/5342/2017-05-23 |