Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India.
<h4>Background</h4>Aedes-borne disease risk is associated with contemporary urbanization practices where city developing structures function as a catalyst for creating mosquito breeding habitats. We lack better understanding on how the links between landscape ecology and urban geography...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2023-11-01
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| Series: | PLoS Neglected Tropical Diseases |
| Online Access: | https://journals.plos.org/plosntds/article/file?id=10.1371/journal.pntd.0011702&type=printable |
| _version_ | 1797394409375924224 |
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| author | Deepa Dharmamuthuraja Rohini P D Iswarya Lakshmi M Kavita Isvaran Susanta Kumar Ghosh Farah Ishtiaq |
| author_facet | Deepa Dharmamuthuraja Rohini P D Iswarya Lakshmi M Kavita Isvaran Susanta Kumar Ghosh Farah Ishtiaq |
| author_sort | Deepa Dharmamuthuraja |
| collection | DOAJ |
| description | <h4>Background</h4>Aedes-borne disease risk is associated with contemporary urbanization practices where city developing structures function as a catalyst for creating mosquito breeding habitats. We lack better understanding on how the links between landscape ecology and urban geography contribute to the prevalence and abundance of mosquito and pathogen spread.<h4>Methods</h4>An outdoor longitudinal study in Bengaluru (Karnataka, India) was conducted between February 2021 and June 2022 to examine the effects of macrohabitat types on the diversity and distribution of larval habitats, mosquito species composition, and body size to quantify the risk of dengue outbreak in the landscape context.<h4>Findings</h4>A total of 8,717 container breeding sites were inspected, of these 1,316 were wet breeding habitats. A total of 1,619 mosquito larvae representing 16 species from six macrohabitats and nine microhabitats were collected. Aedes aegypti and Aedes albopictus were the dominant species and significantly higher in artificial habitats than in natural habitats. Breeding preference ratio for Aedes species was high in grinding stones and storage containers. The Aedes infestation indices were higher than the WHO threshold and showed significant linear increase from Barren habitat to High density areas. We found Ae. albopictus breeding in sympatry with Ae. aegypti had shorter wing length.<h4>Conclusions</h4>A large proportion of larval habitats were man-made artificial containers. Landscape ecology drives mosquito diversity and abundance even at a small spatial scale which could be affecting the localized outbreaks. Our findings showed that sampling strategies for mosquito surveillance must include urban environments with non-residential locations and dengue transmission reduction programmes should focus on 'neighbourhood surveillance' as well to prevent and control the rising threat of Aedes-borne diseases. |
| first_indexed | 2024-03-09T00:18:16Z |
| format | Article |
| id | doaj.art-616dc07b8bc648bea1c029ce49bc5f38 |
| institution | Directory Open Access Journal |
| issn | 1935-2727 1935-2735 |
| language | English |
| last_indexed | 2024-03-09T00:18:16Z |
| publishDate | 2023-11-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Neglected Tropical Diseases |
| spelling | doaj.art-616dc07b8bc648bea1c029ce49bc5f382023-12-12T05:39:15ZengPublic Library of Science (PLoS)PLoS Neglected Tropical Diseases1935-27271935-27352023-11-011711e001170210.1371/journal.pntd.0011702Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India.Deepa DharmamuthurajaRohini P DIswarya Lakshmi MKavita IsvaranSusanta Kumar GhoshFarah Ishtiaq<h4>Background</h4>Aedes-borne disease risk is associated with contemporary urbanization practices where city developing structures function as a catalyst for creating mosquito breeding habitats. We lack better understanding on how the links between landscape ecology and urban geography contribute to the prevalence and abundance of mosquito and pathogen spread.<h4>Methods</h4>An outdoor longitudinal study in Bengaluru (Karnataka, India) was conducted between February 2021 and June 2022 to examine the effects of macrohabitat types on the diversity and distribution of larval habitats, mosquito species composition, and body size to quantify the risk of dengue outbreak in the landscape context.<h4>Findings</h4>A total of 8,717 container breeding sites were inspected, of these 1,316 were wet breeding habitats. A total of 1,619 mosquito larvae representing 16 species from six macrohabitats and nine microhabitats were collected. Aedes aegypti and Aedes albopictus were the dominant species and significantly higher in artificial habitats than in natural habitats. Breeding preference ratio for Aedes species was high in grinding stones and storage containers. The Aedes infestation indices were higher than the WHO threshold and showed significant linear increase from Barren habitat to High density areas. We found Ae. albopictus breeding in sympatry with Ae. aegypti had shorter wing length.<h4>Conclusions</h4>A large proportion of larval habitats were man-made artificial containers. Landscape ecology drives mosquito diversity and abundance even at a small spatial scale which could be affecting the localized outbreaks. Our findings showed that sampling strategies for mosquito surveillance must include urban environments with non-residential locations and dengue transmission reduction programmes should focus on 'neighbourhood surveillance' as well to prevent and control the rising threat of Aedes-borne diseases.https://journals.plos.org/plosntds/article/file?id=10.1371/journal.pntd.0011702&type=printable |
| spellingShingle | Deepa Dharmamuthuraja Rohini P D Iswarya Lakshmi M Kavita Isvaran Susanta Kumar Ghosh Farah Ishtiaq Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India. PLoS Neglected Tropical Diseases |
| title | Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India. |
| title_full | Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India. |
| title_fullStr | Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India. |
| title_full_unstemmed | Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India. |
| title_short | Determinants of Aedes mosquito larval ecology in a heterogeneous urban environment- a longitudinal study in Bengaluru, India. |
| title_sort | determinants of aedes mosquito larval ecology in a heterogeneous urban environment a longitudinal study in bengaluru india |
| url | https://journals.plos.org/plosntds/article/file?id=10.1371/journal.pntd.0011702&type=printable |
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