Stability of cephalosporins in horse serum.

This study investigates the stability of various cephalosporin antibiotics when stored in horse serum at different temperatures for a length of time.

Overview of the Research

• This study is primarily focused on determining how the antibiotic activity of six different cephalosporin antibiotics – cephalothin, cephaloridine, cephalexin, cephaloglycin, cefazolin, and cefamandole – is affected by storage in horse serum at two different temperatures; -10 and 4 degrees Celsius, for a period of up to 30 days.

Findings

• The results showed varying degrees of stability for each antibiotic in different conditions. At -10 degrees Celsius, cephalothin, cefamandole, cefazolin, and cephalexin showed stability for at least 30 days. However, cephaloridine lost 29% of its initial activity and cephaloglycin lost more than 50% by the end of the same period.
• At a higher temperature of 4 degrees Celsius, cefamandole, cefazolin, and cephalexin could only be stored for 3 days before experiencing a significant loss in activity. Conversely, cephalothin, cephaloridine, and cephaloglycin were only stable for 1 day at this temperature.
• In addition to the effect of temperature and duration on antibiotic stability, the researchers also discovered that the process of freezing and thawing negatively impacted the stability of cephaloridine in particular.

Implications

• This research provides valuable information about the stability of various cephalosporin antibiotics under different storage conditions in horse serum, which is of crucial importance for their potential use in veterinary applications, particularly in horses. Ensuring the stability of these antibiotics ensures their effectiveness when administered over a longer period, thus safeguarding animal health and proper treatment.
• The findings also highlight the need for careful consideration about storage conditions, specifically temperature, which can significantly impact the efficacy of these antibiotics—an important aspect for veterinary practitioners, drug manufacturers, and researchers.