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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| Veröffentlicht in: | PLoS neglected tropical diseases 2012-09, Vol.6 (9), p.e1821-e1821 |
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| description | 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 |
| doi_str_mv | 10.1371/journal.pntd.0001821 |
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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<0.001). Although, dengue incidence rate was significantly lower in the middle and lower class neighborhoods (F = 73.97, d.f. = 2, p<0.001), no difference in IgM prevalence was shown. The city is subject to two transmission peaks in the winter (i.e. November-January), and summer (i.e. June-August). The serological peaks of dengue are preceded by entomological peaks that occur before the onset of winter (November) and summer (March) respectively.
Dengue incidence is heterogeneously distributed across the neighborhoods of Port Sudan and exhibits a bi-cyclic intra-annual pattern. Hence, it should be feasible to carry out timely vector control measures to prevent or reduce dengue transmission.</description><identifier>ISSN: 1935-2735</identifier><identifier>ISSN: 1935-2727</identifier><identifier>EISSN: 1935-2735</identifier><identifier>DOI: 10.1371/journal.pntd.0001821</identifier><identifier>PMID: 23029582</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>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</subject><ispartof>PLoS neglected tropical diseases, 2012-09, Vol.6 (9), p.e1821-e1821</ispartof><rights>COPYRIGHT 2012 Public Library of Science</rights><rights>2012 Seidahmed et al 2012 Seidahmed et al</rights><rights>Seidahmed et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited: Seidahmed OME, Hassan SA, Soghaier MA, Siam HAM, Ahmed FTA, et al. (2012) Spatial and Temporal Patterns of Dengue Transmission along a Red Sea Coastline: A Longitudinal Entomological and Serological Survey in Port Sudan City. PLoS Negl Trop Dis 6(9): e1821. doi:10.1371/journal.pntd.0001821</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c662t-e8b7a29549a91ed7c86c1928dc7a72948493daba00507204a0523eef50595dcf3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3459851/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3459851/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,724,777,781,861,882,2096,2915,23847,27905,27906,53772,53774,79349,79350</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23029582$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Kading, Rebekah Crockett</contributor><creatorcontrib>Seidahmed, Osama M E</creatorcontrib><creatorcontrib>Hassan, Safa A</creatorcontrib><creatorcontrib>Soghaier, Mohamed A</creatorcontrib><creatorcontrib>Siam, Hanna A M</creatorcontrib><creatorcontrib>Ahmed, Fayez T A</creatorcontrib><creatorcontrib>Elkarsany, Mubarak M</creatorcontrib><creatorcontrib>Sulaiman, Suad M</creatorcontrib><title>Spatial and temporal patterns of dengue transmission along a Red Sea coastline: a longitudinal entomological and serological survey in Port Sudan city</title><title>PLoS neglected tropical diseases</title><addtitle>PLoS Negl Trop Dis</addtitle><description>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<0.001). Although, dengue incidence rate was significantly lower in the middle and lower class neighborhoods (F = 73.97, d.f. = 2, p<0.001), no difference in IgM prevalence was shown. The city is subject to two transmission peaks in the winter (i.e. November-January), and summer (i.e. June-August). The serological peaks of dengue are preceded by entomological peaks that occur before the onset of winter (November) and summer (March) respectively.
Dengue incidence is heterogeneously distributed across the neighborhoods of Port Sudan and exhibits a bi-cyclic intra-annual pattern. Hence, it should be feasible to carry out timely vector control measures to prevent or reduce dengue transmission.</description><subject>Adolescent</subject><subject>Adult</subject><subject>Aedes - growth & development</subject><subject>Aged</subject><subject>Animals</subject><subject>Antibodies, Viral - blood</subject><subject>Biology</subject><subject>Child</subject><subject>Child, Preschool</subject><subject>Demographic aspects</subject><subject>Dengue</subject><subject>Dengue - epidemiology</subject><subject>Dengue - transmission</subject><subject>Dengue Virus - immunology</subject><subject>Disease transmission</subject><subject>Disease Vectors</subject><subject>Enzyme-Linked Immunosorbent Assay</subject><subject>Epidemics</subject><subject>Female</subject><subject>Geography</subject><subject>Humans</subject><subject>Immunoglobulin M - blood</subject><subject>Incidence</subject><subject>Infant</subject><subject>Longitudinal Studies</subject><subject>Male</subject><subject>Medicine</subject><subject>Methods</subject><subject>Middle Aged</subject><subject>Prevention</subject><subject>Red Sea</subject><subject>Retrospective Studies</subject><subject>Risk factors</subject><subject>Seroepidemiologic Studies</subject><subject>Sudan - epidemiology</subject><subject>Weather</subject><subject>Young Adult</subject><issn>1935-2735</issn><issn>1935-2727</issn><issn>1935-2735</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>DOA</sourceid><recordid>eNptkl2LEzEUhgdR3HX1H4gGBPGmNR8znYwXwrL4sbCgWL0Op8mZacpMUpPMQv-Iv9eM7ZYWZC6SnDznzTnvnKJ4yeiciZq93_gxOOjnW5fMnFLKJGePikvWiGrGa1E9PtlfFM9i3FBaNZVkT4sLLijPW35Z_FluIVnoCThDEg5bH_IhxxIGF4lviUHXjUhSABcHG6P1jkDvXUeA_EBDlghEe4iptw4_5OB0Z9NobK6OoEt-8L3vrD48EjEcz3EM97gj1pHvPiSyHA04om3aPS-etNBHfHFYr4pfnz_9vPk6u_v25fbm-m6mFwueZihXNeROygYahqbWcqFZw6XRNdS8KWXZCAMryJ3TmtMSaMUFYltNThjdiqvi9V532_uoDpZGxbiUbHJZZuJ2TxgPG7UNdoCwUx6s-hfwoVMQktU9KtMIqBEbXYEp-UKuGl3XWpt2IWFRMpG1Ph5eG1cDGp3NyW6fiZ7fOLtWnb9XoqwaWbEs8O4gEPzvEWNS-Y9o7Htw6MdcN5W8pJWkTUbf7NEOcmnWtT4r6glX1yLbISkTVabm_6HyZ3Cw2jtsbY6fJbw9SVgj9GkdfT-mPBbxHCz3oA4-xoDtsU1G1WTtg9tqGmB1GOCc9urUomPSw8SKv4St8AY</recordid><startdate>20120901</startdate><enddate>20120901</enddate><creator>Seidahmed, Osama M E</creator><creator>Hassan, Safa A</creator><creator>Soghaier, Mohamed A</creator><creator>Siam, Hanna A M</creator><creator>Ahmed, Fayez T A</creator><creator>Elkarsany, Mubarak M</creator><creator>Sulaiman, Suad M</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20120901</creationdate><title>Spatial and temporal patterns of dengue transmission along a Red Sea coastline: a longitudinal entomological and serological survey in Port Sudan city</title><author>Seidahmed, Osama M E ; 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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<0.001). Although, dengue incidence rate was significantly lower in the middle and lower class neighborhoods (F = 73.97, d.f. = 2, p<0.001), no difference in IgM prevalence was shown. The city is subject to two transmission peaks in the winter (i.e. November-January), and summer (i.e. June-August). The serological peaks of dengue are preceded by entomological peaks that occur before the onset of winter (November) and summer (March) respectively.
Dengue incidence is heterogeneously distributed across the neighborhoods of Port Sudan and exhibits a bi-cyclic intra-annual pattern. Hence, it should be feasible to carry out timely vector control measures to prevent or reduce dengue transmission.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23029582</pmid><doi>10.1371/journal.pntd.0001821</doi><oa>free_for_read</oa></addata></record> |
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| 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 |
| title | Spatial and temporal patterns of dengue transmission along a Red Sea coastline: a longitudinal entomological and serological survey in Port Sudan city |
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