Title Genotyping of enteroviruses isolated in Kenya from pediatric patients using partial VP1 region.
Author Opanda, Silvanos M; Wamunyokoli, Fred; Khamadi, Samoel; Coldren, Rodney; Bulimo, Wallace D
Journal Springerplus Publication Year/Month 2016
PMID 27026855 PMCID PMC4766141
Affiliation + expend 1.Department of Emerging Infectious Diseases (DEID), United States Army Medical Research Directorate-Kenya, P.O. Box 606-00621, Nairobi, Kenya ; College of Health Sciences (COHES), Jomo Kenyatta University of Agriculture and Technology (JKUAT), Nairobi, Kenya.

Enteroviruses (EV) are responsible for a wide range of clinical diseases in humans. Though studied broadly in several regions of the world, the genetic diversity of human enteroviruses (HEV) circulating in the sub-Saharan Africa remains under-documented. In the current study, we molecularly typed 61 HEV strains isolated in Kenya between 2008 and 2011 targeting the 3\'-end of the VP1 gene. Viral RNA was extracted from the archived isolates and part of the VP1 gene amplified by RT-PCR, followed by sequence analysis. Twenty-two different EV types were detected. Majority (72.0 %) of these belonged to Enterovirus B species followed by Enterovirus D (21.3 %) and Enterovirus A (6.5 %). The most frequently detected types were Enterovirus-D68 (EV-D68), followed by Coxsackievirus B2 (CV-B2), CV-B1, CV-B4 and CV-B3. Phylogenetic analyses of these viruses revealed that Kenyan CV-B1 isolates were segregated among sequences of global CV-B1 strains. Conversely, the Kenyan CV-B2, CV-B3, CV-B4 and EV-D68 strains generally grouped together with those detected from other countries. Notably, the Kenyan EV-D68 strains largely clustered with sequences of global strains obtained between 2008 and 2010 than those circulating in recent years. Overall, our results indicate that HEV strains belonging to Enterovirus D and Enterovirus B species pre-dominantly circulated and played a significant role in pediatric respiratory infection in Kenya, during the study period. The Kenyan CV-B1 strains were genetically divergent from those circulating in other countries. Phylogenetic clustering of Kenyan EV-D68 strains with sequences of global strains circulating between 2008 and 2010 than those obtained in recent years suggests a high genomic variability associated with the surface protein encoding VP1 gene in these enteroviruses.

StrainID RV Species Serotype Length(nt) Country Year Strain Name
UNS04541 Unclassified None 338 Kenya 2009 HRV_101_009
UNS04542 Unclassified None 352 Kenya 2010 HRV_118_010
UNS04543 Unclassified None 352 Kenya 2010 HRV_119-010
UNS04544 Unclassified None 320 Kenya 2010 HRV_120_010
UNS04545 Unclassified None 349 Kenya 2010 HRV_130_010
UNS04546 Unclassified None 332 Kenya 2010 HRV_135_010
UNS04547 Unclassified None 332 Kenya 2010 HRV_136_010
UNS04548 Unclassified None 352 Kenya 2010 HRV_143_010
UNS04549 Unclassified None 347 Kenya 2010 HRV_149_010
UNS04550 Unclassified None 343 Kenya 2008 HRV_028_008
UNS04551 Unclassified None 338 Kenya 2008 HRV_033_008
UNS04552 Unclassified None 335 Kenya 2011 HRV_197_011
UNS04553 Unclassified None 347 Kenya 2010 HRV_142_010
UNS04554 Unclassified None 338 Kenya 2008 HRV_025_008
UNS04555 Unclassified None 338 Kenya 2008 HRV_061_008
UNS04556 Unclassified None 344 Kenya 2010 HRV_125_010
UNS04557 Unclassified None 317 Kenya 2011 HRV_182_011
UNS04558 Unclassified None 317 Kenya 2010 HRV_161_010
UNS04559 Unclassified None 337 Kenya 2008 HRV_015_008
UNS04560 Unclassified None 310 Kenya 2008 HRV_080_008
UNS04561 Unclassified None 316 Kenya 2011 HRV_178_011
UNS04562 Unclassified None 335 Kenya 2010 HRV_127_010
UNS04563 Unclassified None 332 Kenya 2010 HRV_122_010
UNS04564 Unclassified None 332 Kenya 2010 HRV_121_010
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