Molecular detection of Coxiella burnetii and Neospora caninum in equine aborted foetuses and neonates.

This research investigated the less common infectious agents causing abortion, stillbirth, and neonatal death in horses using molecular biology techniques. They found DNA evidence of Coxiella burnetii and Neospora caninum, among others, in nine separate cases, marking the first time C. burnetii has been detected in equine abortion samples.

Research Context and Methodology

• The study aimed to identify ‘less common’ infectious agents causing equine abortion, stillbirth, and neonatal death. Such conditions are significant causes of mortality in horses and financially impact the equine industry.
• To do this, the researchers carried out a complete necropsy, a post-mortem examination, on 407 cases. These cases included instances of abortion, stillbirth, and neonatal death.
• The necropsy was combined with classical microbiological examinations and molecular biology techniques. This comprehensive examination allowed the researchers to pinpoint the presence of specific infectious organisms.

Study Findings

• The researchers found molecular evidence of less frequent abortive infectious pathogens in nine independent cases of abortion or neonate mortality.
• The detected organisms included Chlamydophila abortus, Coxiella burnetii, and Neospora caninum. The former was found in one case, whereas C. burnetii and N. caninum were identified in six and three instances, respectively.
• Interestingly, one sample showed co-infection by both N. caninum and C. burnetii.

Significance of Study

• This research reported the first-ever detection of Coxiella burnetii in equine abortion samples, contributing to the existing body of knowledge on infectious pathogens causing equine abortion.
• The study suggests that Coxiella burnetii and Neospora caninum should probably be considered during a differential diagnosis for equine abortion, alongside other common pathogens.
• The results of this study could guide more effective strategies for prevention and treatment of equine abortion, stillbirth, and neonate death, hence helping to reduce equine mortality and economic loss in the industry.