Comparison of two fecal egg recovery techniques and larval culture for cyathostomins in horses.

The research article investigates the effectiveness of two different techniques, the McMaster and centrifugal flotation techniques, and larval culture for detecting small strongyle eggs in horse feces. The study found that the centrifugal flotation technique consistently gave better results, particularly when dealing with a low number of fecal eggs.

Research Methodology

The research study was conducted in three parts. Pre-collected horse fecal samples were used in all three experiments.

• In the first experiment, fresh feces from a single horse were homogenized and then randomly subsampled using the McMaster and centrifugal flotation techniques. This was repeated ten times.
• In the second experiment, samples from 43 horses that hadn’t been treated with any anti-parasitic medication were analyzed using the McMaster technique, the centrifugal flotation technique, and the larval culture method.
• In the third experiment, samples from 57 horses that had been treated with anthelmintic by their owners were analyzed in the same way as in experiment two.

Study Findings

• In the first experiment, the researchers found that the McMaster technique recovered fewer eggs (72%) compared to the centrifugal flotation method.
• In the second experiment, the McMaster technique was only able to recover 81% of the eggs found by the centrifugal flotation. The study further revealed that only cyathostomins were the result from individual larval cultures, validating the specificity of the tests.
• In the third experiment, test results varied widely. In 24 samples, all three techniques produced negative results. In 18 samples, only larval cultures produced positive results. In 15 samples, only the centrifugal flotation method produced positive results, however, the McMaster technique produced positive results in only 5 of these 15 samples.

Conclusion

The results of the study indicated that the centrifugal flotation technique consistently produced superior results to the McMaster technique, especially when the fecal samples had a low number of eggs. The study concluded that the combination of the centrifugal flotation technique and a larval culture provides the most accurate way to evaluate the effectiveness of anthelmintic drugs in horses.