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Monitoring of seasonality of norovirus and other enteric viruses in Cameroon by real-time PCR: an exploratory study

Journal article
Authors James Ayukekbong
E. M. Andersson
G. Vansarla
F. Tah
T. Nkuo-Akenji
Magnus Lindh
Tomas Bergström
Published in Epidemiology and Infection
Volume 142
Issue 7
Pages 1393-1402
ISSN 0950-2688
Publication year 2014
Published at Institute of Biomedicine, Department of Infectious Medicine
Pages 1393-1402
Language en
Links dx.doi.org/10.1017/s095026881300232...
Keywords Enterovirus, epidemiology, Norwalk agent and related viruses, rotavirus, virus infection
Subject categories Infectious Medicine

Abstract

We studied the seasonal fluctuation of norovirus and other enteric viruses in Cameroon. Two hundred participants aged between 1 and 69 years were prospectively followed up. Each participant provided monthly faecal samples over a 12-month period. A total of 2484 samples were tested using multiplex real-time PCR assay for the detection of norovirus, rotavirus and enterovirus. The effect of weather variables and risk factors were analysed by Pearson correlation and bivariate analysis. Overall, enterovirus was the most commonly detected virus (216% of specimens), followed by norovirus (39%) and rotavirus (04%). Norovirus and enterovirus were detected throughout the year with a peak of norovirus detection at the beginning of the rainy season and a significant alternation of circulation of norovirus genogroups from one month to the next. Age <5 years and consumption of tap water were risk factors for norovirus infection. Better understanding of factors influencing transmission and seasonality may provide insights into the relationship between physical environment and risk of infection for these viruses.

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