Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh
Abstract Background Joint efforts by government and non-government organizations have helped to reduce malaria in Bangladesh and set the country on a clear path to eventual malaria elimination. However, achieving that goal would be challenging without a comprehensive understanding of vector bionomic...
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| Format: | Article |
| Language: | English |
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BMC
2023-06-01
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| Series: | Malaria Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12936-023-04614-2 |
| _version_ | 1797806870272933888 |
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| author | Hasan Mohammad Al-Amin Isabella Rodriguez Ching Swe Phru Wasif A. Khan Rashidul Haque Bernard L. Nahlen Timothy A. Burton Mohammad Shafiul Alam Neil F. Lobo |
| author_facet | Hasan Mohammad Al-Amin Isabella Rodriguez Ching Swe Phru Wasif A. Khan Rashidul Haque Bernard L. Nahlen Timothy A. Burton Mohammad Shafiul Alam Neil F. Lobo |
| author_sort | Hasan Mohammad Al-Amin |
| collection | DOAJ |
| description | Abstract Background Joint efforts by government and non-government organizations have helped to reduce malaria in Bangladesh and set the country on a clear path to eventual malaria elimination. However, achieving that goal would be challenging without a comprehensive understanding of vector bionomics. Methods Targeted capturing of Anopheles mosquitoes over a rainy season, utilizing specific sampling methods, including human landing catches (HLCs), CDC-light traps (CDC-LTs), and pyrethrum spray catches (PSCs) were aimed to characterize entomological drivers of transmission in four sites of Bandarban, Bangladesh. Results Molecular characterization of a subset of 4637 mosquitoes has demonstrated the presence of at least 17 species whose capture rates were representative of the rainy season. Species compositions and bionomic traits did not vary between sites with Anopheles maculatus having the highest landing rate by HLCs and Anopheles vagus having the highest capture rate with CDC-LTs. Interestingly, Anopheles species compositions and capture rates varied significantly (p < 0.05) for An. vagus, between HLCs and its often-used proxy—CDC-LTs- suggesting impacts on downstream analysis. CDC-LTs capture rates demonstrated differing compositions with indoor and outdoor biting rates. For example, Anopheles nigerrimus and Anopheles nivipes were more endophagic by HLCs and more exophagic by CDC-LTs. The use of a cow-baited CDC-LT also demonstrated significantly different results when compared to a human-baited CDC-LT considering the high degree of anthropophily in these species. The exception to both zoophily and indoor resting was An. vagus, which demonstrated both anthropophily and high resting rates indoors—pointing to this species being a possible primary vector at this site. Conclusion A diverse Anopheles fauna in Bandarban has been confirmed through molecular methods, highlighting the potential impact of sampling techniques. Given the complexity of the local ecosystem, a better understanding of mosquito behaviour and ecology is required to achieve the goal of malaria elimination in Bangladesh. |
| first_indexed | 2024-03-13T06:13:55Z |
| format | Article |
| id | doaj.art-c7a599c2707641a9b4446a7b66ad3ff8 |
| institution | Directory Open Access Journal |
| issn | 1475-2875 |
| language | English |
| last_indexed | 2024-03-13T06:13:55Z |
| publishDate | 2023-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Malaria Journal |
| spelling | doaj.art-c7a599c2707641a9b4446a7b66ad3ff82023-06-11T11:06:17ZengBMCMalaria Journal1475-28752023-06-0122111110.1186/s12936-023-04614-2Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, BangladeshHasan Mohammad Al-Amin0Isabella Rodriguez1Ching Swe Phru2Wasif A. Khan3Rashidul Haque4Bernard L. Nahlen5Timothy A. Burton6Mohammad Shafiul Alam7Neil F. Lobo8International Centre for Diarrhoeal Disease Research Bangladesh (icddr,b)Eck Institute for Global Health (EIGH), University of Notre DameInternational Centre for Diarrhoeal Disease Research Bangladesh (icddr,b)International Centre for Diarrhoeal Disease Research Bangladesh (icddr,b)International Centre for Diarrhoeal Disease Research Bangladesh (icddr,b)Eck Institute for Global Health (EIGH), University of Notre DameEck Institute for Global Health (EIGH), University of Notre DameInternational Centre for Diarrhoeal Disease Research Bangladesh (icddr,b)Eck Institute for Global Health (EIGH), University of Notre DameAbstract Background Joint efforts by government and non-government organizations have helped to reduce malaria in Bangladesh and set the country on a clear path to eventual malaria elimination. However, achieving that goal would be challenging without a comprehensive understanding of vector bionomics. Methods Targeted capturing of Anopheles mosquitoes over a rainy season, utilizing specific sampling methods, including human landing catches (HLCs), CDC-light traps (CDC-LTs), and pyrethrum spray catches (PSCs) were aimed to characterize entomological drivers of transmission in four sites of Bandarban, Bangladesh. Results Molecular characterization of a subset of 4637 mosquitoes has demonstrated the presence of at least 17 species whose capture rates were representative of the rainy season. Species compositions and bionomic traits did not vary between sites with Anopheles maculatus having the highest landing rate by HLCs and Anopheles vagus having the highest capture rate with CDC-LTs. Interestingly, Anopheles species compositions and capture rates varied significantly (p < 0.05) for An. vagus, between HLCs and its often-used proxy—CDC-LTs- suggesting impacts on downstream analysis. CDC-LTs capture rates demonstrated differing compositions with indoor and outdoor biting rates. For example, Anopheles nigerrimus and Anopheles nivipes were more endophagic by HLCs and more exophagic by CDC-LTs. The use of a cow-baited CDC-LT also demonstrated significantly different results when compared to a human-baited CDC-LT considering the high degree of anthropophily in these species. The exception to both zoophily and indoor resting was An. vagus, which demonstrated both anthropophily and high resting rates indoors—pointing to this species being a possible primary vector at this site. Conclusion A diverse Anopheles fauna in Bandarban has been confirmed through molecular methods, highlighting the potential impact of sampling techniques. Given the complexity of the local ecosystem, a better understanding of mosquito behaviour and ecology is required to achieve the goal of malaria elimination in Bangladesh.https://doi.org/10.1186/s12936-023-04614-2AnophelesBionomicsHuman landing catchLight trapBangladesh |
| spellingShingle | Hasan Mohammad Al-Amin Isabella Rodriguez Ching Swe Phru Wasif A. Khan Rashidul Haque Bernard L. Nahlen Timothy A. Burton Mohammad Shafiul Alam Neil F. Lobo Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh Malaria Journal Anopheles Bionomics Human landing catch Light trap Bangladesh |
| title | Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh |
| title_full | Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh |
| title_fullStr | Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh |
| title_full_unstemmed | Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh |
| title_short | Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh |
| title_sort | composition of anopheles species and bionomic characteristics over the peak malaria transmission season in bandarban bangladesh |
| topic | Anopheles Bionomics Human landing catch Light trap Bangladesh |
| url | https://doi.org/10.1186/s12936-023-04614-2 |
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