Molecular characterization of two acetylcholinesterase cDNAs in Pediculus human lice.

Two cDNA sequences encoding Drosophila Ace-orthologous and -paralogous acetylcholinesterase precursors (AO- and AP-AChE precursors, respectively), were identified from the body louse, Pediculus humanus humanus L. In vitro inhibition studies with an insecticide-susceptible body louse strain exhibited a simplex inhibitory response of AChE. The I50 values of fenitroxon and carbaryl were estimated to be 2.

Molecular analysis of a para sodium channel gene from pyrethroid-resistant head lice, Pediculus humanus capitis (Anoplura: Pediculidae).

The problem of pyrethroid-resistance in head lice, Pediculus humanus capitis (De Geer), is growing worldwide, and an insensitive sodium channel is suspected as the major mechanism of this resistance. We sequenced an open reading frame (ORF) encoding for the para-orthologous sodium channel from an insecticide-susceptible strain of the body louse, Pediculus humanus humanus (L.), based on conserved peptide sequences and a known partial gene sequence.

Detection of Bartonella quintana from body lice (Anoplura: Pediculidae) infesting homeless people in Tokyo by molecular technique.

We report detection of Bartonella quintana Brenner, the pathogenic agent of trench fever, from body lice, Pediculus humanus L., infesting homeless people in Tokyo by polymerase chain reaction. Two of 12 (16.