Publicação
Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience
| Resumo: | The Republic of Angola is a priority country for onchocerciasis and lymphatic filariasis (LF) elimination, however, the co-distribution of the filarial parasite Loa loa (loiasis) is a significant impediment, due to the risk of severe adverse events (SAEs) associated with ivermectin used in mass drug administration (MDA) campaigns. Angola has a high risk loiasis zone identified in Bengo Province where alternative interventions may need to be implemented; however, the presence and geographical overlap of the three filarial infections/diseases are not well defined. Therefore, this study conducted a rapid integrated filarial mapping survey based on readily identifiable clinical conditions of each disease in this risk zone to help determine prevalence and co-distribution patterns in a timely manner with limited resources. In total, 2007 individuals from 29 communities in five provincial municipalities were surveyed. Community prevalence estimates were determined by the rapid assessment procedure for loiasis (RAPLOA) and rapid epidemiological mapping of onchocerciasis (REMO) together with two questions on LF clinical manifestations (presence of lymphoedema, hydrocoele). Overall low levels of endemicity, with different overlapping distributions were found. Loiasis was found in 18 communities with a prevalence of 2.0% (31/1571), which contrasted to previous results defining the area as a high risk zone. Onchocerciasis prevalence was 5.3% (49/922) in eight communities, and LF prevalence was 0.4% for lymphoedema (8/2007) and 2.6% for hydrocoeles (20/761 males) in seven and 12 communities respectively. The clinical mapping survey method helped to highlight that all three filarial infections are present in this zone of Bengo Province. However, the significant difference in loiasis prevalence found between the past and this current survey suggests that further studies including serological and parasitological confirmation are required. This will help determine levels of infection and risk, understand the associations between clinical, serological and parasitological prevalence patterns, and better determine the most appropriate treatment strategies to reach onchocerciasis and LF elimination targets in the loiasis co-endemic areas. Our results also suggest that the utility of the earlier RAPLOA derived maps, based on surveys undertaken over a decade ago, are likely to be invalid given the extent of population movement and environmental change, particularly deforestation, and that fine scale micro-mapping is required to more precisely delineate the interventions required defined by these complex co-endemicities. |
|---|---|
| Autores principais: | Brito, Miguel |
| Outros Autores: | Paulo, Rossely; Van-Dunem, Pedro; Martins, António; Unnasch, Thomas R.; Novak, Robert J.; Jacob, Benjamin; Stanton, Michelle C.; Molyneux, David H.; Kelly-Hope, Louise A. |
| Assunto: | Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| Ano: | 2017 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico de Lisboa |
| _version_ | 1866887461506908160 |
|---|---|
| author | Brito, Miguel |
| author2 | Paulo, Rossely Van-Dunem, Pedro Martins, António Unnasch, Thomas R. Novak, Robert J. Jacob, Benjamin Stanton, Michelle C. Molyneux, David H. Kelly-Hope, Louise A. |
| author2_role | author author author author author author author author author |
| author_facet | Brito, Miguel Paulo, Rossely Van-Dunem, Pedro Martins, António Unnasch, Thomas R. Novak, Robert J. Jacob, Benjamin Stanton, Michelle C. Molyneux, David H. Kelly-Hope, Louise A. |
| author_role | author |
| contributor_name_str_mv | RCIPL |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Brito, Miguel\",\"Person.identifier.orcid\":\"0000-0001-6394-658X\"},{\"Person.name\":\"Paulo, Rossely\"},{\"Person.name\":\"Van-Dunem, Pedro\"},{\"Person.name\":\"Martins, António\"},{\"Person.name\":\"Unnasch, Thomas R.\"},{\"Person.name\":\"Novak, Robert J.\"},{\"Person.name\":\"Jacob, Benjamin\"},{\"Person.name\":\"Stanton, Michelle C.\"},{\"Person.name\":\"Molyneux, David H.\"},{\"Person.name\":\"Kelly-Hope, Louise A.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RCIPL |
| datacite.creators.creator.creatorName.fl_str_mv | Brito, Miguel Paulo, Rossely Van-Dunem, Pedro Martins, António Unnasch, Thomas R. Novak, Robert J. Jacob, Benjamin Stanton, Michelle C. Molyneux, David H. Kelly-Hope, Louise A. |
| datacite.date.Accepted.fl_str_mv | 2017-08-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2017-05-26T15:47:38Z |
| datacite.date.embargoed.fl_str_mv | 2017-05-26T15:47:38Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| datacite.titles.title.fl_str_mv | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| dc.contributor.none.fl_str_mv | RCIPL |
| dc.creator.none.fl_str_mv | Brito, Miguel Paulo, Rossely Van-Dunem, Pedro Martins, António Unnasch, Thomas R. Novak, Robert J. Jacob, Benjamin Stanton, Michelle C. Molyneux, David H. Kelly-Hope, Louise A. |
| dc.date.Accepted.fl_str_mv | 2017-08-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2017-05-26T15:47:38Z |
| dc.date.embargoed.fl_str_mv | 2017-05-26T15:47:38Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10400.21/7079 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.cclincense.fl_str_mv | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| dc.title.fl_str_mv | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The Republic of Angola is a priority country for onchocerciasis and lymphatic filariasis (LF) elimination, however, the co-distribution of the filarial parasite Loa loa (loiasis) is a significant impediment, due to the risk of severe adverse events (SAEs) associated with ivermectin used in mass drug administration (MDA) campaigns. Angola has a high risk loiasis zone identified in Bengo Province where alternative interventions may need to be implemented; however, the presence and geographical overlap of the three filarial infections/diseases are not well defined. Therefore, this study conducted a rapid integrated filarial mapping survey based on readily identifiable clinical conditions of each disease in this risk zone to help determine prevalence and co-distribution patterns in a timely manner with limited resources. In total, 2007 individuals from 29 communities in five provincial municipalities were surveyed. Community prevalence estimates were determined by the rapid assessment procedure for loiasis (RAPLOA) and rapid epidemiological mapping of onchocerciasis (REMO) together with two questions on LF clinical manifestations (presence of lymphoedema, hydrocoele). Overall low levels of endemicity, with different overlapping distributions were found. Loiasis was found in 18 communities with a prevalence of 2.0% (31/1571), which contrasted to previous results defining the area as a high risk zone. Onchocerciasis prevalence was 5.3% (49/922) in eight communities, and LF prevalence was 0.4% for lymphoedema (8/2007) and 2.6% for hydrocoeles (20/761 males) in seven and 12 communities respectively. The clinical mapping survey method helped to highlight that all three filarial infections are present in this zone of Bengo Province. However, the significant difference in loiasis prevalence found between the past and this current survey suggests that further studies including serological and parasitological confirmation are required. This will help determine levels of infection and risk, understand the associations between clinical, serological and parasitological prevalence patterns, and better determine the most appropriate treatment strategies to reach onchocerciasis and LF elimination targets in the loiasis co-endemic areas. Our results also suggest that the utility of the earlier RAPLOA derived maps, based on surveys undertaken over a decade ago, are likely to be invalid given the extent of population movement and environmental change, particularly deforestation, and that fine scale micro-mapping is required to more precisely delineate the interventions required defined by these complex co-endemicities. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorio.ipl.pt/bitstreams/5726afa1-745d-44ad-91c7-17d937d1299e/download |
| id | ripl_e44a3ddd096f0a8a4ed36c1ffe1444cd |
| identifier.url.fl_str_mv | http://hdl.handle.net/10400.21/7079 |
| instacron_str | ipl |
| institution | Instituto Politécnico de Lisboa |
| instname_str | Instituto Politécnico de Lisboa |
| language | eng |
| network_acronym_str | ripl |
| network_name_str | Repositório Científico do Instituto Politécnico de Lisboa |
| oai_identifier_str | oai:repositorio.ipl.pt:10400.21/7079 |
| organization_str_mv | urn:organizationAcronym:ipl |
| person_str_mv | Brito, Miguel Brito, Miguel https://www.ciencia-id.pt/231F-F341-7E93 231F-F341-7E93 http://orcid.org/0000-0001-6394-658X 0000-0001-6394-658X Paulo, Rossely Van-Dunem, Pedro Martins, António Unnasch, Thomas R. Novak, Robert J. Jacob, Benjamin Stanton, Michelle C. Molyneux, David H. Kelly-Hope, Louise A. |
| publishDate | 2017 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | Repositório Científico do Instituto Politécnico de Lisboa |
| repository_id_str | urn:repositoryAcronym:ripl |
| service_str_mv | urn:repositoryAcronym:ripl |
| spelling | engElsevierpt_PTThe Republic of Angola is a priority country for onchocerciasis and lymphatic filariasis (LF) elimination, however, the co-distribution of the filarial parasite Loa loa (loiasis) is a significant impediment, due to the risk of severe adverse events (SAEs) associated with ivermectin used in mass drug administration (MDA) campaigns. Angola has a high risk loiasis zone identified in Bengo Province where alternative interventions may need to be implemented; however, the presence and geographical overlap of the three filarial infections/diseases are not well defined. Therefore, this study conducted a rapid integrated filarial mapping survey based on readily identifiable clinical conditions of each disease in this risk zone to help determine prevalence and co-distribution patterns in a timely manner with limited resources. In total, 2007 individuals from 29 communities in five provincial municipalities were surveyed. Community prevalence estimates were determined by the rapid assessment procedure for loiasis (RAPLOA) and rapid epidemiological mapping of onchocerciasis (REMO) together with two questions on LF clinical manifestations (presence of lymphoedema, hydrocoele). Overall low levels of endemicity, with different overlapping distributions were found. Loiasis was found in 18 communities with a prevalence of 2.0% (31/1571), which contrasted to previous results defining the area as a high risk zone. Onchocerciasis prevalence was 5.3% (49/922) in eight communities, and LF prevalence was 0.4% for lymphoedema (8/2007) and 2.6% for hydrocoeles (20/761 males) in seven and 12 communities respectively. The clinical mapping survey method helped to highlight that all three filarial infections are present in this zone of Bengo Province. However, the significant difference in loiasis prevalence found between the past and this current survey suggests that further studies including serological and parasitological confirmation are required. This will help determine levels of infection and risk, understand the associations between clinical, serological and parasitological prevalence patterns, and better determine the most appropriate treatment strategies to reach onchocerciasis and LF elimination targets in the loiasis co-endemic areas. Our results also suggest that the utility of the earlier RAPLOA derived maps, based on surveys undertaken over a decade ago, are likely to be invalid given the extent of population movement and environmental change, particularly deforestation, and that fine scale micro-mapping is required to more precisely delineate the interventions required defined by these complex co-endemicities.application/pdfpt_PTRapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experiencePersonalBrito, MiguelDSpacehttp://dspace.org/items/4252d8e0-800c-4d67-8b13-0b711d860669DSpacehttp://dspace.org/items/4252d8e0-800c-4d67-8b13-0b711d860669BritoMiguelCiência IDhttps://www.ciencia-id.pt231F-F341-7E93ORCIDhttp://orcid.org0000-0001-6394-658XResearcher IDhttps://www.researcherid.comA-7970-2016Scopus Author IDhttps://www.scopus.com35224551000Scopus Author IDhttps://www.scopus.com57200288349Paulo, RosselyVan-Dunem, PedroMartins, AntónioUnnasch, Thomas R.Novak, Robert J.Jacob, BenjaminStanton, Michelle C.Molyneux, David H.Kelly-Hope, Louise A.HostingInstitutionOrganizationalRCIPLe-mailmailto:rcaap@sp.ipl.ptrcaap@sp.ipl.ptDOIIsPartOf10.1016/j.parepi.2017.05.0012017-05-26T15:47:38Z2017-082017-08-01T00:00:00ZHandlehttp://hdl.handle.net/10400.21/7079http://purl.org/coar/access_right/c_abf2open accessFilariasisLoiasisLoa loaTropical eye wormSevere adverse eventsSAEsOnchocerciasisLymphatic filariasisElephantiasisMappingNodulesHydrocoeleLymphoedemaIvermectinRAPLOA, REMONTDsNeglected tropical diseasesAngolaSub-saharan Africa959198 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal article2017-08http://creativecommons.org/licenses/by-nc-nd/4.0/http://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ipl.pt/bitstreams/5726afa1-745d-44ad-91c7-17d937d1299e/downloadParasite Epidemiology and Control237184 |
| spellingShingle | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience Brito, Miguel Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| status | SINGLETON |
| subject.fl_str_mv | Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| title | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| title_full | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| title_fullStr | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| title_full_unstemmed | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| title_short | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| title_sort | Rapid integrated clinical survey to determine prevalence and co-distribution patterns of lymphatic filariasis and onchocerciasis in a Loa loa co-endemic area: the Angolan experience |
| topic | Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| topic_facet | Filariasis Loiasis Loa loa Tropical eye worm Severe adverse events SAEs Onchocerciasis Lymphatic filariasis Elephantiasis Mapping Nodules Hydrocoele Lymphoedema Ivermectin RAPLOA, REMO NTDs Neglected tropical diseases Angola Sub-saharan Africa |
| url | http://hdl.handle.net/10400.21/7079 |
| visible | 1 |