Quantitative culture of Rhodococcus equi from the feces of horse.

This research study examines the existence of Rhodococcus equi bacteria in horse feces, confirming that R. equi is part of the normal intestinal flora in horses.

Isolation and Quantitative Culture of Rhodococcus equi

• The primary aim of the study was to isolate Rhodococcus equi, a type of bacterium, from horse feces. This was achieved by utilizing a NANC medium, which is a type of culture medium that encourages the growth of particular bacterial species for study.
• Once isolated, the concentration of R. equi was quantified, indicating the number of these bacteria present in a given amount of feces. This process is known as a quantitative culture.

Observations and Results

• R. equi was found in the feces of all the horses in the study, including both mares and foals. This suggests that the bacterium is a common component of the horse’s intestinal flora, or the community of microorganisms living in their digestive tracts.
• The average number of viable R. equi organisms identified in 1 gram of fecal matter was 8.42 X 10(2) for mares and slightly lower for foals, at 7.57 X 10(2).
• The confidence interval for these results, which provides a range within which the true value is likely to lie with a 95% probability, was between 6.48 X 10(2) and 1.09 X 10(3) for mares, and from 4.19 X 10(2) to 1.37 X 10(3) for foals.

Conclusions

• The results of the study confirm that R. equi is a part of the normal intestinal flora in horses. This could have implications for understanding the health and disease susceptibility of horses, as changes in the composition of intestinal flora can impact both overall health and response to diseases.