Detection of fibrin deposits in horse tissues by immunohistochemistry.

This research investigates how immuno-histochemical (IHC) techniques can accurately identify fibrin deposits in horses suffering from severe ischemic and inflammatory illnesses. Fibrin deposits are indicators of a potentially life-threatening condition known as disseminated intravascular coagulation (DIC). The study demonstrated that IHC was a more reliable method for detecting fibrin deposits compared to traditional histochemical staining methods.

Research Methods

The research methods employed in this study include:

• Collecting tissue-organ samples from postmortem examination of 87 horses with severe inflammatory and ischemic gastrointestinal disorders.
• Samples were also obtained from 13 horses with colic and colonic obstructions or displacements, and 13 slaughter horses were used as control groups.
• The tissue samples, which included kidney, lung, and liver tissues, were stained with phosphotungstic acid hematoxylin (PTAH) and IHC. These stained samples were then subjected to blind histological examination and comparative analysis.
• A fibrin score was established for each tissue sample, as well as for each horse, using both PTAH and IHC staining techniques.

Research Findings

The research findings include:

• The IHC method was able to detect fibrin deposition in 47.1% of the horses with colic which is a sign of poor prognosis, as opposed to the 41.4% detection rate for the conventional PTAH staining method.
• When both methods were compared, a correlation of 70% was achieved reinforcing the reliability of the IHC technique.
• The lung was identified as the most affected organ with a higher frequency of detection of fibrin deposits.
• Almost none of the horses from the control groups (those with colic and the slaughter horses) showed fibrin deposits in their tissues. This suggests that the presence of fibrin deposits was more probable in horses with severe inflammatory and ischemic disorders.

Conclusions

The conclusions drawn from the research include:

• The IHC technique for detecting fibrin antigens proved highly effective for identifying fibrin deposits in horse tissues, indicating it may serve as a reliable technique for diagnosing DIC postmortem in horses.