Short and long term evaluation of the efficiency of PermaNet® 2. 0 bed net against environmental factors and washing using bioassay tests
Rev. Inst. Med. Trop. Säo Paulo
;
59: e18, 2017. tab, graf
Article
in English
| LILACS
| ID: biblio-842766
ABSTRACT
ABSTRACT The aim of the present study was to examine the resistance of PermaNet® 2.0 bed nets against repeated washing and environmental factors by using bioassay tests. After 5, 15 and 21 washings with detergents and by using bioassay tests, the resistance of 40 PermaNet® 2.0 bed nets was compared with that of 40 bed nets conventionally treated with one K-O tablet. To examine the long-term resistance, 31 PermaNet® 2.0 bed nets were also distributed among villagers, and were re-collected to perform bioassay tests after 1, 2 and 5 years. In the first phase of this study, the insecticidal effect of the conventionally-treated nets significantly decreased due to repeated washings (P < 0.001); however, it was not significant regarding PermaNet® 2.0 bed nets (P = 0.92 in continuous exposure and P = 0.12 in mortality tests). In the long-term phase of this study, the time required for knockdown of PermaNet® 2.0 increased over the first 2 years and then decreased. In addition, the mortality rate decreased over the first 2 years and then increased. In conclusion, it seems that the technique used by the manufacturer for impregnation of PermaNet® 2.0 bed nets has an acceptable efficiency in comparison with conventional techniques.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Pyrethrins
/
Mosquito Control
/
Insecticide-Treated Bednets
/
Insecticides
/
Malaria
/
Nitriles
Type of study:
Diagnostic study
/
Evaluation studies
Limits:
Animals
Language:
English
Journal:
Rev. Inst. Med. Trop. Säo Paulo
Journal subject:
Tropical Medicine
Year:
2017
Type:
Article
Affiliation country:
Iran
Institution/Affiliation country:
Lorestan University/IR
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