Effect of Procaine Penicillin G and Flunixin Meglumine on Serum Amyloid A Response in Healthy Adult Horses.

The research study explores the impact of procaine penicillin G (PPG) and flunixin meglumine on serum amyloid A (SAA) responses when administered to healthy adult horses. The study concludes that administering PPG and/or flunixin meglumine to horses does not generally result in an inflammatory response above the norm, as indicated by the SAA values.

Research Method

• The study involved six healthy adults horses subjected to different treatments in a cross-over research design. The treatments were divided into groups, which had a control group receiving no treatment, a group receiving PPG alone, a group given flunixin meglumine alone, and a fourth group that was administered both PPG and flunixin meglumine.
• The PPG was administered intramuscularly every 12 hours for 72 hours, while the flunixin meglumine was given intravenously every 24 hours for the same period of 72 hours.
• To measure the SAA response to these treatments, blood samples were collected at distinct intervals: 0, 24, 48, 72, 96, and 120 hours after the initial administration of the drugs. The SAA measurements were made using a lateral-flow immunoassay, a well-validated method of medical testing.

Results

• The SAA values observed in the control group remained within the standard reference range, which is ≤ 20 µg/mL. Only one horse from this group showed an SAA value of 28 µg/mL at the 72-hour mark.
• The group administered with PPG alone consistently showed SAA values within the standard range throughout the duration of the study.
• Similarly, in the group given flunixin meglumine alone, the SAA values observed were within the normal range except for one horse, which showed an SAA of 24 µg/mL at the 96-hour mark.
• In the combined treatment group, five horses had SAA values within the reference range, while one showed an increased SAA response ranging between 32-45 µg/mL from 48 to 96 hours post-drug administration.

Conclusion

• The study concluded that the administration of PPG and/or flunixin meglumine doesn’t typically evoke an inflammatory response resulting in SAA value beyond the standard reference range in healthy adult horses.
• The study found no significant difference in the levels of SAA response amongst the control group and the various treatment groups, implying the absence of any conspicuous inflammatory response.