Premium
Effects of the spatial repellent metofluthrin on landing rates of outdoor biting anophelines in C ambodia, S outheast A sia
Author(s) -
CHARLWOOD J. D.,
NENHEP S.,
PROTOPOPOFF N.,
SOVANNAROTH S.,
MORGAN J. C.,
HEMINGWAY J.
Publication year - 2016
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1111/mve.12168
Subject(s) - biology , toxicology , malaria , biting , significant difference , pyrethroid , zoology , veterinary medicine , ecology , pesticide , immunology , medicine
The emergence of artemisinin‐resistant malaria in S outheast A sia is a major problem. The fact that many people become infected with malaria when they are outside has prompted the development of ‘spatial’ rather than topical repellents. The respective effects of one or four slow‐release emanators of metofluthrin, a pyrethroid, were tested in P ailin, P ursat and K oh K ong, C ambodia. Numbers of mosquitoes counted in outdoor landing catches when one or four emanators were suspended close to the collector were compared with control collections. In P ailin, the effects of emanators on catches in F urvela tent traps and C enters for D isease C ontrol ( CDC ) light traps suspended underneath houses were also investigated. Rate ratios were used to determine differences. A total of 29 255 mosquitoes were collected over 2934 h of landing collections, 87 nights of tent trapping and 81 nights of light trap capture. In P ailin, landing rates were reduced by 48% by a single emanator and by 67% by four emanators ( P < 0.001). Similar reductions were observed in the number of mosquitoes collected in tent traps and the number of anophelines only collected in light traps. Results were similar in P ursat, but, for unknown reasons, those in K oh K ong showed no difference between control and metofluthrin collections ( P > 0.05). These findings suggest that although the product can produce a significant effect, it requires further improvement.