Serratia marcescens endocarditis in a horse.

The research article reports a case of bacterial endocarditis caused by Serratia marcescens in a 2-year-old Arabian stallion, which eventually resulted in its death. This claimed to be the first reported case of such infection in horses, although multiple occurrences in humans have been well-documented.

Case Introduction

• The research discusses a rare case of endocarditis, an inflammation of the inner layer of the heart, caused by the bacterium Serratia marcescens in a 2-year-old Arabian stallion.
• This bacterial strain is commonly found in immune-compromised human patients but has not been reported before in horses, making it a unique case in veterinary medicine.

Treatment and Outcome

• The horse was subjected to a month-long treatment using broad-spectrum antibiotics to combat the infection.
• Despite the treatment, the horse’s condition worsened and it died several months after the discontinuation of treatment.

Implication of the Study

• The case study challenges the belief that Serratia marcescens only infects immunocompromised human patients, revealing its potential threat to animals as well.
• Further research is encouraged in order to better understand the behavioral pattern of this bacterium in different hosts and seek more effective treatment options for animals.
• The inability to treat the horse effectively, despite using broad-spectrum antibiotics, indicates potential antibiotic resistance by Serratia marcescens and calls for a better approach to manage such infections in animals.