Efficacy of moxidectin 2 per cent gel against naturally acquired strongyle infections in horses, with particular reference to larval cyathostomes.
The efficacy of moxidectin 2 per cent equine gel against naturally acquired strongyle infections was assessed in 18 ponies which had grazed on contaminated pasture before being housed for eight weeks. Twenty-four hours before the treatment, two randomly selected ponies were euthanased and their worm burdens were determined. Eight of the remaining 16 ponies were treated with moxidectin 2 per cent gel while the other eight were given a placebo gel. Eight weeks later the 16 animals were necropsied and their worm burdens established. A 100 per cent efficacy was recorded against adult and lumenal L4 cyathostomes and adult Strongylus and Triodontophorus species. Digest recoveries of larval cyathostomes indicated a 90.8 per cent (P<0.002) reduction in early L3 and a 99.9 per cent (P<0.001) reduction in developing stages. There was a reduction in faecal egg output of between 96 and 100 per cent in the treated animals compared with the controls.
Department of Veterinary Parasitology, University of Glasgow Veterinary School.
K
K
Bairden
S R
SR
Brown
J
J
McGoldrick
L D
LD
Parker
P J
PJ
Talty
D000818:Animals; D000871:Anthelmintics / Q000494:pharmacology / Q000627:therapeutic use*; D000900:Anti-Bacterial Agents / Q000494:pharmacology / Q000627:therapeutic use*; D005243:Feces / Q000469:parasitology; D005260:Female; D006736:Horses; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D018942:Macrolides; D008297:Male; D013319:Strongyle Infections, Equine / Q000188:drug therapy* / Q000469:parasitology; D013320:Strongyloidea / Q000187:drug effects* / Q000254:growth & development; D016896:Treatment Outcome
D000871:Anthelmintics; D000900:Anti-Bacterial Agents; D018942:Macrolides; C027837:moxidectin