Cholesterol in the Cuticular Wax of Boophilus microplus

The production of cuticle wax by engorged females of the cattle tick, Boophilus microplus (Canestrini).

The layer of wax secreted on to the surface of the cuticle by arthropods plays an important part in protecting these animals against physico-chemical hazards of their environment, and so contributes significantly to the difficulty and expense of controlling economically undesirable species. In spite of this importance, however, very little is known about the biosynthesis of cuticle wax or the q...

Integrate Control of Boophilus Microplus in Cattle

Acaricide resistance mechanisms in Rhipicephalus (Boophilus) microplus Mecanismos de resistência aos acaricidas em Rhipicephalus (Boophilus) microplus

Acaricide resistance has become widespread in countries where cattle ticks, Rhipicephalus (Boophilus) microplus, are a problem. Resistance arises through genetic changes in a cattle tick population that causes modifications to the target site, increased metabolism or sequestration of the acaricide, or reduced ability of the acaricide to penetrate through the outer protective layers of the tick’...

Prostaglandin in the saliva of the cattle tick Boophilus microplus.

Previous studies of saliva from engorged female cattle ticks revealed a component which induced contration of some isolated smooth muscles. Fractionation and further characterisation have shown that this substance is of the "slow-reacting" type, but that it is neither a bradykinin nor slow-reacting substance of anaphylaxis. The substance is deactivated by incubation with 15-hydroxprostaglandin ...

A Boophilus microplus vitellin-degrading cysteine endopeptidase.

Here we describe the purification and characterization of a vitellin (VT) degrading cysteine endopeptidase (VTDCE) from eggs of the hard tick Boophilus microplus. A homogeneous enzyme preparation was obtained by chromatographic fractionation on ion-exchange and gel filtration columns and an autolysis step. This step consisted of incubation of a semipurified enzyme (after the first ion-exchange ...