[Trichomonad infections of the oral cavity in horses in southern Germany].

This research analyses the occurrence of oral infections by Trichomonas parasites in horses from southern Germany. The study found 15% of the horses were infected, with no obvious oral symptoms in all positive cases, although colic, coughing, and lumbago were identified in some horses.

Trichomonad Detection in Horses

• The study conducted investigations on 60 horses in southern Germany to detect oral Trichomonad infections. Trichomonads are a kind of single-celled protozoal parasite which can lead to infections in animals and humans.
• The parasites were found in 9 of the 60 investigated horses, representing 15 percent of the study sample. The presence of these parasites did not coincide with any clinical signs or visible discomfort in the oral cavity of the horses, except for dental tartar.

Associated Clinical Signs

• Further clinical investigations in the positive cases revealed additional symptoms in some horses. Four of the trichomonad-infected horses were displaying signs of colic, four had coughing disorders, and one horse was found to have lumbago. This suggests that though the oral cavity showed no signs of trichomonad invasion, the parasites may have indirectly contributed to other health disorders in the horses.

Microscopy Observations

• Scanning electron microscopy was used to visualise and determine the morphological properties of the trichomonads. The parasites were found to be round or pear-shaped, averaging 7.6 microns in length and 6.3 microns in width.
• The genus Trichomonas was classified based on the presence of four anterior flagella averaging 8.3 microns in length, an undulating membrane measuring 8.7 microns with no trailing flagellum, and an axostyle (a type of support structure within the cell) that projected, on average, 7.8 microns beyond the body of the parasite.