Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa
<p>Abstract</p> <p>Background</p> <p>The emerging highly pathogenic avian influenza strain H5N1 ("HPAI-H5N1") has spread broadly in the past decade, and is now the focus of considerable concern. We tested the hypothesis that spatial distributions of HPAI-H5N1...
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| Format: | Article |
| Language: | English |
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BMC
2009-07-01
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| Series: | International Journal of Health Geographics |
| Online Access: | http://www.ij-healthgeographics.com/content/8/1/47 |
| _version_ | 1818689910833414144 |
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| author | Peterson A Townsend Williams Richard AJ |
| author_facet | Peterson A Townsend Williams Richard AJ |
| author_sort | Peterson A Townsend |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>The emerging highly pathogenic avian influenza strain H5N1 ("HPAI-H5N1") has spread broadly in the past decade, and is now the focus of considerable concern. We tested the hypothesis that spatial distributions of HPAI-H5N1 cases are related consistently and predictably to coarse-scale environmental features in the Middle East and northeastern Africa.</p> <p>We used ecological niche models to relate virus occurrences to 8 km resolution digital data layers summarizing parameters of monthly surface reflectance and landform. Predictive challenges included a variety of spatial stratification schemes in which models were challenged to predict case distributions in broadly unsampled areas.</p> <p>Results</p> <p>In almost all tests, HPAI-H5N1 cases were indeed occurring under predictable sets of environmental conditions, generally predicted absent from areas with low NDVI values and minimal seasonal variation, and present in areas with a broad range of and appreciable seasonal variation in NDVI values. Although we documented significant predictive ability of our models, even between our study region and West Africa, case occurrences in the Arabian Peninsula appear to follow a distinct environmental regime.</p> <p>Conclusion</p> <p>Overall, we documented a variable environmental "fingerprint" for areas suitable for HPAI-H5N1 transmission.</p> |
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| format | Article |
| id | doaj.art-1a8b52a99b7d45aba1f2902f224453ba |
| institution | Directory Open Access Journal |
| issn | 1476-072X |
| language | English |
| last_indexed | 2024-12-17T12:17:37Z |
| publishDate | 2009-07-01 |
| publisher | BMC |
| record_format | Article |
| series | International Journal of Health Geographics |
| spelling | doaj.art-1a8b52a99b7d45aba1f2902f224453ba2022-12-21T21:49:07ZengBMCInternational Journal of Health Geographics1476-072X2009-07-01814710.1186/1476-072X-8-47Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern AfricaPeterson A TownsendWilliams Richard AJ<p>Abstract</p> <p>Background</p> <p>The emerging highly pathogenic avian influenza strain H5N1 ("HPAI-H5N1") has spread broadly in the past decade, and is now the focus of considerable concern. We tested the hypothesis that spatial distributions of HPAI-H5N1 cases are related consistently and predictably to coarse-scale environmental features in the Middle East and northeastern Africa.</p> <p>We used ecological niche models to relate virus occurrences to 8 km resolution digital data layers summarizing parameters of monthly surface reflectance and landform. Predictive challenges included a variety of spatial stratification schemes in which models were challenged to predict case distributions in broadly unsampled areas.</p> <p>Results</p> <p>In almost all tests, HPAI-H5N1 cases were indeed occurring under predictable sets of environmental conditions, generally predicted absent from areas with low NDVI values and minimal seasonal variation, and present in areas with a broad range of and appreciable seasonal variation in NDVI values. Although we documented significant predictive ability of our models, even between our study region and West Africa, case occurrences in the Arabian Peninsula appear to follow a distinct environmental regime.</p> <p>Conclusion</p> <p>Overall, we documented a variable environmental "fingerprint" for areas suitable for HPAI-H5N1 transmission.</p>http://www.ij-healthgeographics.com/content/8/1/47 |
| spellingShingle | Peterson A Townsend Williams Richard AJ Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa International Journal of Health Geographics |
| title | Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa |
| title_full | Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa |
| title_fullStr | Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa |
| title_full_unstemmed | Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa |
| title_short | Ecology and geography of avian influenza (HPAI H5N1) transmission in the Middle East and northeastern Africa |
| title_sort | ecology and geography of avian influenza hpai h5n1 transmission in the middle east and northeastern africa |
| url | http://www.ij-healthgeographics.com/content/8/1/47 |
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