Elimination of mucosal cyathostome larvae by five daily treatments with fenbendazole.

This research studied the effectiveness of fenbendazole in treating mucosal cyathostome larvae in ponies. The results showed that the five daily treatments with the drug significantly reduced both luminal parasites and mucosal larvae in the animals.

Experiment Setup

• Twenty ponies aged between 12 and 24 months were selected for this study. All had naturally acquired cyathostome infections.
• They first grazed on infected pasture for 3 weeks before being kept indoors for six weeks. This method was employed to ensure an initial accumulation of the parasite among all subjects.
• Then, ten of these ponies were chosen for treatment with 7.5mg fenbendazole per kg of body weight for five consecutive days, while the rest served as a control group.

Evaluation Process

• After another six weeks, both the treated and control group ponies were euthanized for the assessment of the treatment’s effectiveness.
• The researchers measured levels of large intestinal cyathostome worms, including luminal parasites and mucosal larvae in the ponies.

Results

• In control animals, about 7% of the total worm burden was present in the gut lumen, while approximately 93% existed as larvae in the large intestinal mucosa.
• Treatment with fenbendazole proved to be highly effective against both luminal cyathostomes and mucosal larvae.
• The total numbers of mucosal larvae were reduced by 95.3%, including late third and fourth stage larvae, which were diminished by about 99.4%.
• The quantity of early inhibited third stage larvae also declined significantly, by 91.5%.

In conclusion, the research shows that fenbendazole is a highly effective medication against mucosal cyathostome larvae, providing a scientifically backed treatment option for ponies infected with the parasite.