Control of Aedes aegypti Breeding: A Novel Intervention for Prevention and Control of Dengue in an Endemic Zone of Delhi, India
The study is based on hypothesis that whether continuous entomological surveillance of Ae. aegypti and simultaneous appropriate interventions in key containers during non-transmission (December-May) months would have any impact on breeding of Aedes and dengue cases during the following transmission...
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| creator | Nagpal, B N Gupta, Sanjeev Kumar Shamim, Arshad Vikram, Kumar Srivastava, Aruna Tuli, N R Saxena, Rekha Singh, Himmat Singh, V P Bhagat, V N Yadav, N K Valecha, Neena |
| description | The study is based on hypothesis that whether continuous entomological surveillance of Ae. aegypti and simultaneous appropriate interventions in key containers during non-transmission (December-May) months would have any impact on breeding of Aedes and dengue cases during the following transmission months (June-November). The impact of the surveillance and intervention measures undertaken during non-transmission months were assessed by entomological indicators namely container index (CI), house index (HI), pupal index (PI) and breteau index (BI).
A total of 28 localities of West Zone of Delhi with persistent dengue endemicity were selected for the study. Out of these localities, 20 were included in study group while other 8 localities were in control group. IEC and various Aedes breeding control activities were carried out in study group in both non-transmission and transmission season whereas control group did not have any such interventions during non-transmission months as per guidelines of MCD. These activities were undertaken by a team of investigators from NIMR and SDMC, Delhi. In control group, investigators from NIMR carried out surveillance activity to monitor the breeding of Aedes mosquito in localities.
Comparison of baseline data revealed that all indices in control and study group of localities were comparable and statistically non-significant (p>0.05). In both study and control groups, indices were calculated after pooling data on seasonal basis, i.e., transmission and non-transmission months for both years. The test of significance conducted on all the four indices, i.e., HI, PI, CI, and BI, revealed a significant difference (p |
| doi_str_mv | 10.1371/journal.pone.0166768 |
| format | Article |
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A total of 28 localities of West Zone of Delhi with persistent dengue endemicity were selected for the study. Out of these localities, 20 were included in study group while other 8 localities were in control group. IEC and various Aedes breeding control activities were carried out in study group in both non-transmission and transmission season whereas control group did not have any such interventions during non-transmission months as per guidelines of MCD. These activities were undertaken by a team of investigators from NIMR and SDMC, Delhi. In control group, investigators from NIMR carried out surveillance activity to monitor the breeding of Aedes mosquito in localities.
Comparison of baseline data revealed that all indices in control and study group of localities were comparable and statistically non-significant (p>0.05). In both study and control groups, indices were calculated after pooling data on seasonal basis, i.e., transmission and non-transmission months for both years. The test of significance conducted on all the four indices, i.e., HI, PI, CI, and BI, revealed a significant difference (p<0.05) between the study group and control group during transmission and non-transmission months except in HI. Due to consistent intervention measures undertaken in non-transmission months in study group, reduction in CI, HI, BI and PI was observed 63%, 62%, 64% and 99% respectively during transmission months as compared to control group where increase of 59%, 102%, 73% and 71% respectively. As a result of reduction in larval indices, no dengue case (except one NS1) was observed in study group, whereas 38 dengue cases were observed in control group.
Through this pilot study, it is concluded that proper intervention in non-transmission season reduces vector density and subsequently dengue cases in transmission season.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0166768</identifier><identifier>PMID: 27918577</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Aedes ; Aedes - growth & development ; Aedes - virology ; Aedes aegypti ; Animals ; Aquatic insects ; Biology and Life Sciences ; Breeding ; Breeding - methods ; Containers ; Control ; Dengue ; Dengue - prevention & control ; Dengue - transmission ; Dengue - virology ; Dengue fever ; Dengue Virus - pathogenicity ; Disease control ; Disease prevention ; Disease transmission ; Ecology and Environmental Sciences ; Epidemics ; Humans ; India ; Infections ; Insect Vectors - virology ; Intervention ; Malaria ; Medicine and Health Sciences ; Mosquito Control - methods ; Mosquitoes ; Municipal solid waste ; People and Places ; Pilot Projects ; Population ; Prevention ; Seasons ; Social Sciences ; Statistical analysis ; Surveillance ; Tropical diseases ; Vector-borne diseases ; Yellow fever mosquito</subject><ispartof>PloS one, 2016-12, Vol.11 (12), p.e0166768-e0166768</ispartof><rights>COPYRIGHT 2016 Public Library of Science</rights><rights>2016 Nagpal et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2016 Nagpal et al 2016 Nagpal et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c725t-cfb0ea49e350b4ac3e5a6f32a17598e6bfa3c72211d14740c6735575c84e14e43</citedby><cites>FETCH-LOGICAL-c725t-cfb0ea49e350b4ac3e5a6f32a17598e6bfa3c72211d14740c6735575c84e14e43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5137876/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5137876/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,2096,2915,23845,27901,27902,53766,53768,79343,79344</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27918577$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Paul, Richard</contributor><creatorcontrib>Nagpal, B N</creatorcontrib><creatorcontrib>Gupta, Sanjeev Kumar</creatorcontrib><creatorcontrib>Shamim, Arshad</creatorcontrib><creatorcontrib>Vikram, Kumar</creatorcontrib><creatorcontrib>Srivastava, Aruna</creatorcontrib><creatorcontrib>Tuli, N R</creatorcontrib><creatorcontrib>Saxena, Rekha</creatorcontrib><creatorcontrib>Singh, Himmat</creatorcontrib><creatorcontrib>Singh, V P</creatorcontrib><creatorcontrib>Bhagat, V N</creatorcontrib><creatorcontrib>Yadav, N K</creatorcontrib><creatorcontrib>Valecha, Neena</creatorcontrib><title>Control of Aedes aegypti Breeding: A Novel Intervention for Prevention and Control of Dengue in an Endemic Zone of Delhi, India</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>The study is based on hypothesis that whether continuous entomological surveillance of Ae. aegypti and simultaneous appropriate interventions in key containers during non-transmission (December-May) months would have any impact on breeding of Aedes and dengue cases during the following transmission months (June-November). The impact of the surveillance and intervention measures undertaken during non-transmission months were assessed by entomological indicators namely container index (CI), house index (HI), pupal index (PI) and breteau index (BI).
A total of 28 localities of West Zone of Delhi with persistent dengue endemicity were selected for the study. Out of these localities, 20 were included in study group while other 8 localities were in control group. IEC and various Aedes breeding control activities were carried out in study group in both non-transmission and transmission season whereas control group did not have any such interventions during non-transmission months as per guidelines of MCD. These activities were undertaken by a team of investigators from NIMR and SDMC, Delhi. In control group, investigators from NIMR carried out surveillance activity to monitor the breeding of Aedes mosquito in localities.
Comparison of baseline data revealed that all indices in control and study group of localities were comparable and statistically non-significant (p>0.05). In both study and control groups, indices were calculated after pooling data on seasonal basis, i.e., transmission and non-transmission months for both years. The test of significance conducted on all the four indices, i.e., HI, PI, CI, and BI, revealed a significant difference (p<0.05) between the study group and control group during transmission and non-transmission months except in HI. Due to consistent intervention measures undertaken in non-transmission months in study group, reduction in CI, HI, BI and PI was observed 63%, 62%, 64% and 99% respectively during transmission months as compared to control group where increase of 59%, 102%, 73% and 71% respectively. As a result of reduction in larval indices, no dengue case (except one NS1) was observed in study group, whereas 38 dengue cases were observed in control group.
Through this pilot study, it is concluded that proper intervention in non-transmission season reduces vector density and subsequently dengue cases in transmission season.</description><subject>Aedes</subject><subject>Aedes - growth & development</subject><subject>Aedes - virology</subject><subject>Aedes aegypti</subject><subject>Animals</subject><subject>Aquatic insects</subject><subject>Biology and Life Sciences</subject><subject>Breeding</subject><subject>Breeding - methods</subject><subject>Containers</subject><subject>Control</subject><subject>Dengue</subject><subject>Dengue - prevention & control</subject><subject>Dengue - transmission</subject><subject>Dengue - virology</subject><subject>Dengue fever</subject><subject>Dengue Virus - pathogenicity</subject><subject>Disease control</subject><subject>Disease prevention</subject><subject>Disease transmission</subject><subject>Ecology and Environmental Sciences</subject><subject>Epidemics</subject><subject>Humans</subject><subject>India</subject><subject>Infections</subject><subject>Insect Vectors - virology</subject><subject>Intervention</subject><subject>Malaria</subject><subject>Medicine and Health Sciences</subject><subject>Mosquito Control - methods</subject><subject>Mosquitoes</subject><subject>Municipal solid waste</subject><subject>People and Places</subject><subject>Pilot Projects</subject><subject>Population</subject><subject>Prevention</subject><subject>Seasons</subject><subject>Social Sciences</subject><subject>Statistical analysis</subject><subject>Surveillance</subject><subject>Tropical diseases</subject><subject>Vector-borne diseases</subject><subject>Yellow fever 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K</au><au>Valecha, Neena</au><au>Paul, Richard</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Control of Aedes aegypti Breeding: A Novel Intervention for Prevention and Control of Dengue in an Endemic Zone of Delhi, India</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2016-12-05</date><risdate>2016</risdate><volume>11</volume><issue>12</issue><spage>e0166768</spage><epage>e0166768</epage><pages>e0166768-e0166768</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>The study is based on hypothesis that whether continuous entomological surveillance of Ae. aegypti and simultaneous appropriate interventions in key containers during non-transmission (December-May) months would have any impact on breeding of Aedes and dengue cases during the following transmission months (June-November). The impact of the surveillance and intervention measures undertaken during non-transmission months were assessed by entomological indicators namely container index (CI), house index (HI), pupal index (PI) and breteau index (BI).
A total of 28 localities of West Zone of Delhi with persistent dengue endemicity were selected for the study. Out of these localities, 20 were included in study group while other 8 localities were in control group. IEC and various Aedes breeding control activities were carried out in study group in both non-transmission and transmission season whereas control group did not have any such interventions during non-transmission months as per guidelines of MCD. These activities were undertaken by a team of investigators from NIMR and SDMC, Delhi. In control group, investigators from NIMR carried out surveillance activity to monitor the breeding of Aedes mosquito in localities.
Comparison of baseline data revealed that all indices in control and study group of localities were comparable and statistically non-significant (p>0.05). In both study and control groups, indices were calculated after pooling data on seasonal basis, i.e., transmission and non-transmission months for both years. The test of significance conducted on all the four indices, i.e., HI, PI, CI, and BI, revealed a significant difference (p<0.05) between the study group and control group during transmission and non-transmission months except in HI. Due to consistent intervention measures undertaken in non-transmission months in study group, reduction in CI, HI, BI and PI was observed 63%, 62%, 64% and 99% respectively during transmission months as compared to control group where increase of 59%, 102%, 73% and 71% respectively. As a result of reduction in larval indices, no dengue case (except one NS1) was observed in study group, whereas 38 dengue cases were observed in control group.
Through this pilot study, it is concluded that proper intervention in non-transmission season reduces vector density and subsequently dengue cases in transmission season.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>27918577</pmid><doi>10.1371/journal.pone.0166768</doi><tpages>e0166768</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1932-6203 |
| ispartof | PloS one, 2016-12, Vol.11 (12), p.e0166768-e0166768 |
| issn | 1932-6203 1932-6203 |
| language | eng |
| recordid | cdi_plos_journals_1846008878 |
| source | Public Library of Science (PLoS) Journals Open Access; MEDLINE; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Aedes Aedes - growth & development Aedes - virology Aedes aegypti Animals Aquatic insects Biology and Life Sciences Breeding Breeding - methods Containers Control Dengue Dengue - prevention & control Dengue - transmission Dengue - virology Dengue fever Dengue Virus - pathogenicity Disease control Disease prevention Disease transmission Ecology and Environmental Sciences Epidemics Humans India Infections Insect Vectors - virology Intervention Malaria Medicine and Health Sciences Mosquito Control - methods Mosquitoes Municipal solid waste People and Places Pilot Projects Population Prevention Seasons Social Sciences Statistical analysis Surveillance Tropical diseases Vector-borne diseases Yellow fever mosquito |
| title | Control of Aedes aegypti Breeding: A Novel Intervention for Prevention and Control of Dengue in an Endemic Zone of Delhi, India |
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