Antimicrobial selection and dosage in the treatment of equine bacterial infections.

The study focuses on effective antibacterial treatment strategies for bacterial infections in horses, emphasizing the right choice and dosage of antimicrobial agents that account for the severity of the infection, the pathogenic microorganism’s susceptibility, and safety considerations.

Understanding Antimicrobial Selection and Dosage

• The research highlights that the efficacy of antimicrobial therapy is reliant on administering a drug to which the disease-causing bacteria are susceptible, and which can reach effective concentrations at the site where the infection is present.
• Dosage adjustments can be made based on the agent used, the severity of the infection, and the microorganism’s susceptibility to the drug. In particular, the study cites penicillins as flexible in terms of dosing adjustments.

Limits to Certain Antimicrobial Agents

• In contrast to penicillins, aminoglycosides are mentioned to have a relatively narrow margin for safety. This places a limit on the dose of the drug that can be safely administered to the horse.
• In severe cases of infection, it’s critical to quickly establish effective antimicrobial concentrations to combat the infection as soon as possible. Thus, the selection of the appropriate drug should be grounded in past experience treating similar cases, with a strong emphasis on achieving high concentrations within the horse’s plasma.

Considerations for Septicaemic Conditions in Foals

• In cases where neonatal foals present with septicaemic conditions, there is also a need to correct deficits in serum immunoglobulins. The management of these conditions is not restricted to just antibacterial therapy.
• For such cases, the administration of antimicrobial agents or combinations capable of producing a bactericidal effect are advisable. But, it is also important to consider that the dosage might need adjustment to account for the foal’s immature physiological processes.