Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions
Insecticide-treated nets provide a reduction in human-vector contact through physical barrier, mortality and/or repellent effects that protect both users and non-users, thereby protecting the wider community from vector-borne diseases like malaria. Long-lasting insecticide-treated nets (LLINs) are t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
2011-08-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762011000500013&lng=en&tlng=en |
| _version_ | 1797703196557180928 |
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| author | Gloria I Jaramillo Paulo C Robledo Neila J Mina Jazmin A Muñoz Clara B Ocampo |
| author_facet | Gloria I Jaramillo Paulo C Robledo Neila J Mina Jazmin A Muñoz Clara B Ocampo |
| author_sort | Gloria I Jaramillo |
| collection | DOAJ |
| description | Insecticide-treated nets provide a reduction in human-vector contact through physical barrier, mortality and/or repellent effects that protect both users and non-users, thereby protecting the wider community from vector-borne diseases like malaria. Long-lasting insecticide-treated nets (LLINs) are the best alternative. This study evaluated the bioefficacy of LLINs PermaNet® 2.0 and Olyset® under laboratory conditions with Anopheles albimanus. The laboratory strain was evaluated for insecticide susceptibility with selected insecticides used for malarial control. Regeneration time and wash resistance were evaluated with the standard bioassay cone technique following WHO guidelines. Heat assistance was used for Olyset® nets; the nets were exposed to four different temperatures to speed the regeneration process. The regeneration study of PermaNet® 2.0 showed that efficacy was fully recovered by 24 h after one and three washes and wash resistance persisted for 15 washes. Regeneration of Olyset® nets was not observed for nets washed three times, even with the different temperature exposures for up to seven days. Thus, for Olyset® the wash resistance evaluation could not proceed. Differences in response between the two LLINs may be associated with differences in manufacturing procedures and species response to the evaluated LLINs. PermaNet® 2.0 showed higher and continuous efficacy against An. albimanus. |
| first_indexed | 2024-03-12T05:01:58Z |
| format | Article |
| id | doaj.art-9fd91ec6096c4d9c8bfc0f2ff96e5f72 |
| institution | Directory Open Access Journal |
| issn | 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T05:01:58Z |
| publishDate | 2011-08-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-9fd91ec6096c4d9c8bfc0f2ff96e5f722023-09-03T09:11:23ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz1678-80602011-08-01106560661210.1590/S0074-02762011000500013S0074-02762011000500013Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditionsGloria I Jaramillo0Paulo C Robledo1Neila J Mina2Jazmin A Muñoz3Clara B Ocampo4Centro Internacional de Entrenamiento e Investigaciones MédicasCentro Internacional de Entrenamiento e Investigaciones MédicasCentro Internacional de Entrenamiento e Investigaciones MédicasCentro Internacional de Entrenamiento e Investigaciones MédicasCentro Internacional de Entrenamiento e Investigaciones MédicasInsecticide-treated nets provide a reduction in human-vector contact through physical barrier, mortality and/or repellent effects that protect both users and non-users, thereby protecting the wider community from vector-borne diseases like malaria. Long-lasting insecticide-treated nets (LLINs) are the best alternative. This study evaluated the bioefficacy of LLINs PermaNet® 2.0 and Olyset® under laboratory conditions with Anopheles albimanus. The laboratory strain was evaluated for insecticide susceptibility with selected insecticides used for malarial control. Regeneration time and wash resistance were evaluated with the standard bioassay cone technique following WHO guidelines. Heat assistance was used for Olyset® nets; the nets were exposed to four different temperatures to speed the regeneration process. The regeneration study of PermaNet® 2.0 showed that efficacy was fully recovered by 24 h after one and three washes and wash resistance persisted for 15 washes. Regeneration of Olyset® nets was not observed for nets washed three times, even with the different temperature exposures for up to seven days. Thus, for Olyset® the wash resistance evaluation could not proceed. Differences in response between the two LLINs may be associated with differences in manufacturing procedures and species response to the evaluated LLINs. PermaNet® 2.0 showed higher and continuous efficacy against An. albimanus.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762011000500013&lng=en&tlng=eninsecticidetreated bednetsmosquito controlbiological assay |
| spellingShingle | Gloria I Jaramillo Paulo C Robledo Neila J Mina Jazmin A Muñoz Clara B Ocampo Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions Memorias do Instituto Oswaldo Cruz insecticide treated bednets mosquito control biological assay |
| title | Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions |
| title_full | Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions |
| title_fullStr | Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions |
| title_full_unstemmed | Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions |
| title_short | Comparison of the efficacy of long-lasting insecticidal nets PermaNet® 2.0 and Olyset® against Anopheles albimanus under laboratory conditions |
| title_sort | comparison of the efficacy of long lasting insecticidal nets permanet r 2 0 and olyset r against anopheles albimanus under laboratory conditions |
| topic | insecticide treated bednets mosquito control biological assay |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762011000500013&lng=en&tlng=en |
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