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1 July 2005 Assessment of Laboratory and Field Assays of Sunlight-Induced Killing of Mosquito Larvae by Photosensitizers
Blaise Dondji, Stephane Duchon, Abdoulaye Diabate, Jean Pierre Herve, Vincent Corbel, Jean-Marc Hougard, Rene Santus, Joseph Schrevel, Rene Santus, Joseph Schrevel
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Abstract

The effectiveness of light-induced killing of mosquito larvae in the presence of photosensitizers was studied with larvae of Aedes aegypti (L.), Anopheles stephensi (Liston), and Culex quinquefasciatus Say grown in the laboratory and of Cx. quinquefasciatus grown under field conditions. Tested photosensitizers included xanthene, chlorin, and porphyrin derivatives. All the larvae were treated at the fourth instar. Preliminary laboratory experiments showed a light-induced lethal effect of Rose Bengal (RB) on three species of mosquito larvae. Compared with other photosensitizers, RB seemed to be more efficient at even lower concentration than chlorin (e6) and chlorophyllin on Ae. aegypti larvae. Among the four porphyrin derivatives, i.e., chloroquinoline tetraphenyl propioamidoporphine, tetraphenyl porphine tetrasulfonate, hematoporphyrin (HP), and tetraphenylporphine-propionic acid porphine, HP was the only effective photosensitizer on Ae. aegypti larvae. The best conditions for field tests using RB were conducted on Cx. quinquefasciatus in Bobo-Dioulasso, Burkina Faso. The mortality induced by RB varied from 80 to 96% obtained with unfiltered cesspit water to 0.4 to 6.7% in cesspits with a heavy load of organic materials, thus providing the basis for further developments of this technique under field conditions.

Blaise Dondji, Stephane Duchon, Abdoulaye Diabate, Jean Pierre Herve, Vincent Corbel, Jean-Marc Hougard, Rene Santus, Joseph Schrevel, Rene Santus, and Joseph Schrevel "Assessment of Laboratory and Field Assays of Sunlight-Induced Killing of Mosquito Larvae by Photosensitizers," Journal of Medical Entomology 42(4), 652-656, (1 July 2005). https://doi.org/10.1603/0022-2585(2005)042[0652:AOLAFA]2.0.CO;2
Received: 21 February 2005; Accepted: 6 April 2005; Published: 1 July 2005
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KEYWORDS
hematoporphyrin
larva control
mosquito vectors
photosensitizer
rose bengal
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