Spatial and temporal patterns of dengue transmission along a Red Sea coastline: a longitudinal entomological and serological survey in Port Sudan city

Dengue is an emerging health problem in several coastlines along the Red Sea. The objective of the present work is to elucidate spatial and temporal patterns of dengue transmission in Port Sudan. A longitudinal study with three cross-sectional surveys was carried out in upper, middle and lower class...

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Bibliographic Details
Published in:PLoS neglected tropical diseases 2012-09, Vol.6 (9), p.e1821-e1821
Main Authors: Seidahmed, Osama M E, Hassan, Safa A, Soghaier, Mohamed A, Siam, Hanna A M, Ahmed, Fayez T A, Elkarsany, Mubarak M, Sulaiman, Suad M
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aedes - growth & development
Aged
Animals
Antibodies, Viral - blood
Biology
Child
Child, Preschool
Demographic aspects
Dengue
Dengue - epidemiology
Dengue - transmission
Dengue Virus - immunology
Disease transmission
Disease Vectors
Enzyme-Linked Immunosorbent Assay
Epidemics
Female
Geography
Humans
Immunoglobulin M - blood
Incidence
Infant
Longitudinal Studies
Male
Medicine
Methods
Middle Aged
Prevention
Red Sea
Retrospective Studies
Risk factors
Seroepidemiologic Studies
Sudan - epidemiology
Weather
Young Adult
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Summary:Dengue is an emerging health problem in several coastlines along the Red Sea. The objective of the present work is to elucidate spatial and temporal patterns of dengue transmission in Port Sudan. A longitudinal study with three cross-sectional surveys was carried out in upper, middle and lower class neighborhoods, from November 2008 to October 2009. Monthly, entomological surveys were followed by serological surveys in dengue vector-positive houses. Meteorological records were obtained from two weather stations in the city during the same time. Overall, 2825 houses were inspected. Aedes aegypti represented 65% (35,714/54,944) and 68% (2526/3715) of the collected larvae and pupae, respectively. Out of 4640 drinking water containers, 2297 were positive for Ae. aegypti. Clay-pots "Zeirr" followed by plastic barrels were key productive containers for pupae of dengue vector, 63% (n = 3959) and 26% (n = 1651), respectively. A total of 791 blood samples were tested using PanBio Capture/Indirect IgM ELISA. Overall, the sero-prevalence rate of dengue ranged between 3%-8% (41/791), compared to an incidence of 29-40 new cases per 10,000 (193/54886) in the same examined population. Lower and middle class neighborhoods had higher entomological indices compared with upper class ones (p
ISSN:1935-2735
1935-2727
1935-2735
DOI:10.1371/journal.pntd.0001821