Skin contact with caterpillars of Lonomia moths causes haemostatic dis
orders that may evolve into a haemorrhagic syndrome. Replacement thera
py has been shown to exacerbate the clinical symptoms of this envenomi
ng. In this study it is shown that horses immunized with a bristle ext
ract of L. obliqua caterpillars produced IgG antibodies that completel
y neutralized, in vitro, the toxin(s) responsible for the blood incoag
ulability observed in rats. This antivenom offers the possibility of s
pecific treatment for envenoming caused by contact with caterpillars o
f Lonomia moths. Copyright (C) 1996 Elsevier Science Ltd