Long-term exposure of Aedes aegypti to Bacillus thuringiensis svar. israelensis did not involve altered susceptibility to this microbial larvicide or to other control agents

Table 4 Activity of detoxifying enzymes from Bti-selected Ae. aegypti larvae

Larvae sample^a	α-EST			β-EST			GST			MFO
Larvae sample^a	n	> 99%^b	Status	n	> 99%^b	Status	n	> 99%^b	Status	n	> 99%^b	Status
Rockefeller	150	–	–	89	–	–	96	–	–	112	–	–
RecBti F₁₉	159	0	U	86	2	U	121	2	U	99	11	U
Rockefeller	167	–	–	128	–	–	142	–	–	96	–	–
RecBti F₂₅	160	2	U	159	27	A	113	2	U	111	0	U

Abbreviations: α-EST α-esterases, β-EST β-esterases, GST glutathione-S-transferases, MFO mixed-function oxidases, U, unaltered for percentage below 15%, A, altered for percentage between 15% and 50%
^aThird-instar larvae from the Rockefeller (Rocke) reference strain and the RecBti selected strain from generations F₁₉ and F₂₅
^bPercentage of individuals whose activity is higher than the 99th percentile of the Rockefeller larvae

ISSN: 1756-3305