A critical efficacy test of cambendazole in equids: the use of the geometric means to assess efficacy.

This research examined the effectiveness of a 44.5% paste formulation of cambendazole, an anthelmintic medication, in treating various parasitic infections in five horses and a donkey. The medication demonstrated high efficacy in reducing most tested parasite burdens, but couldn’t fully determine effectiveness against two parasites found in low numbers.

Methodology and Dosing

• The research was a critical trial carried out on five horses and a donkey. The purpose of the trial was to assess the anthelmintic efficiency of a cambendazole paste formulation. Cambendazole is a substance often used as a deworming agent in animals.
• The administered dosage was 20 mg/kg, a measurement which was determined based on the weight of each animal. The therapy aimed to eliminate or significantly reduce parasitic infections.

Effectiveness of Cambendazole

• The results of the trial indicated that the cambendazole paste formulation was highly effective, with reductions in mean parasite burdens as follows: Strongylinae over 99%; Cyathostominae 94%; varying rates on Oxyuris equi depending on their maturity (89% in immature and over 99% in adults); Probostmayria vivipara over 99%; and Habronema muscae 97%.
• These reductions show that cambendazole is highly efficient in treating these types of parasitic infections in equines, with nearly total elimination in most cases.

Limited Application

• During the trial, researchers discovered the parasites Parascaris equorum and Anoplocephala perfoliata in individual animals. However, they were present in such small numbers that a valid calculation of cambendazole’s effectiveness for these two parasites couldn’t be accurately determined.
• Despite this, the treatment did successfully remove all of these particular parasites present in the animals. Future studies with larger populations of these parasites may provide a more definitive answer as to the drug’s efficacy against them.