Peer-reviewed veterinary case report
Fibrinonecrotic Placentitis and Abortion Associated With Pantoea agglomerans Infection in a Mare.
- Journal:
- Journal of equine veterinary science
- Year:
- 2020
- Authors:
- Henker, Luan C et al.
- Affiliation:
- Department of Veterinary Pathology · Brazil
- Species:
- horse
Plain-English summary
In this case from southern Brazil, a mare experienced a serious infection caused by a bacterium called Pantoea agglomerans, which is usually found in soil and plants. This infection led to a condition known as fibrinonecrotic placentitis, which means the placenta became severely inflamed and damaged, ultimately resulting in the loss of her fetus at 10 months of pregnancy. Tests on the placenta, lung, and stomach contents confirmed the presence of this bacterium. The findings highlight that Pantoea agglomerans can be a cause of placentitis and abortion in horses.
Abstract
Pantoea agglomerans, family Enterobacteriaceae, is a Gram-negative bacterium that may be isolated from soil and from plants. This bacterium has been associated with disease in plants, humans, and rarely in domestic animal species. We describe here a case of fibrinonecrotic placentitis and equine abortion associated with P. agglomerans infection in southern Brazil. A fetus with 10 months of gestation and its placenta were evaluated. Gross lesions were observed in the cervical star extending to the body of the chorioallantois and consisted of a focally extensive, transmural, severely thickened yellow area. Histologically, this area in the chorioallantois was effaced by severe necrosis, associated with marked inflammatory infiltrate of neutrophils and abundant deposition of fibrin and cellular debris. Aggregates of bacterial rods were noted intermixed with inflammation areas. No significant lesions were observed in the remaining organs inspected. Tissue samples of the lung, placenta, and stomach contents were cultured, and microbiological tests revealed the growth of P. agglomerans in all evaluated samples. The present study reaffirms the participation of P. agglomerans as a cause of bacterial placentitis and abortion in horses.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/32797784/