Prevalence and intensity of non-strongyle intestinal parasites of horses in northern Queensland.

This study investigates the common non-strongyle intestinal parasites found in horses from northern Queensland, Australia, examining their prevalence and intensity. It also notes differences related to horse stabling conditions, the influence of climate and season, the impact of age, and discusses potential changes in parasite populations due to improved anti-parasite treatments.

Methodology

In this research, a quantitative post-mortem study was conducted on 57 horses from northern Queensland. This means the horses were examined after death to determine which parasites were present in their intestinal system, and how strongly these parasites were infesting the horses.

Findings

• Numerous types of non-strongyle parasites were identified in the horses, including Draschia megastoma, Habronema muscae, Gasterophilus intestinalis, G. nasalis, Parascaris equorum, Strongyloides westeri, Probstmayria vivipara, Oxyuris equi, Anoplocephala magna, and A. perfoliata. Their prevalence (how commonly they were found) varied from 2% to 43%, with an average parasite count per horse ranging from 10 to 1310.
• There were observed differences in parasite types and prevalence between horses kept in stables and those kept in paddocks, with botfly larvae and spiruroids being particularly accentuated.
• Some parasites showed variable prevalence depending on climate and season. In particular, H. muscae, G. nasalis, and P. equorum were more common in the wet season or in horses from wet coastal areas.
• Age of the horses was also a factor, with only P. equorum noted to affect younger horses less than 5 years old.
• However, the research found no significant correlations between the type and prevalence of parasites and the breed or sex of the horses.

Comparison to Other Studies and Further Discussion

• The results of this study were compared to recent studies conducted in Western Australia and the United States. This comparison helps to deepen the understanding of how regional differences might affect horse parasite populations.
• The researchers discuss the potential implications of these findings for current anti-parasite treatments. They suggest that an improved anthelmintic (anti-parasite) treatment strategy may be effective in altering the dynamics of parasite populations in the horse population.