Improved isolation of Clostridium perfringens from foal faeces.

This research looks at the best methods for isolating Clostridium perfringens, bacteria often associated with diarrhoea in foals. The study finds that different methods work separately in isolating the bacteria, so a combination of methods would be necessary for a full evaluation.

Details of the Research

In this research, the authors sought to improve the methods of isolating Clostridium perfringens, a type of bacteria, from foal faeces. The motivation behind this study arose from the recognition that this bacteria has often been associated with foal diarrhoea, and yet, no thorough study of the strength of this association or its relative importance had been conducted.

They began by examining the success of various culture techniques in isolating the bacteria, accounting for the different physiological states of the bacteria. This exploration showed that the germination and growth of a certain strain of the bacteria, C perfringens NCTC 8239 endospores, varied depending on their maturity, and were affected by different pre-treatments.

• These pre-treatments, however, failed in the recovery of vegetative cells or endospores in another strain, the C perfringens NCTC 8237.
• The investigation used faecal samples from 271 foals to test their hypothesis that improvement in the recovery of this bacteria in the various states it appears could be enhanced using several parallel methods.

Findings and Conclusion

The five methods applied used different pre-treatments including heat, ethanol and EDTA, and also no pre-treatment. These methods successfully isolated the bacteria from 64% of the foal samples. However, it’s worth noting that the most successful method only detected 74% of these positive samples.

• Interestingly, each of the methods was able to detect the bacteria in at least one sample that the other methods couldn’t.
• Thus, the researchers decided that to fully evaluate any epidemiological association between the bacteria and foal diarrhoea, it would require using a combination of these methods on each sample.

This study adds to our understanding of the complexities involved in isolating this particular bacteria from foal faeces, and offers a roadmap towards more effective isolation methods for future studies targeting this bacteria and foal diarrhoea.