Fibrinonecrotic Placentitis and Abortion Associated With Pantoea agglomerans Infection in a Mare.
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.
Copyright © 2020 Elsevier Inc. All rights reserved.
Publication Date: 2020-06-06 PubMed ID: 32797784DOI: 10.1016/j.jevs.2020.103156Google Scholar: Lookup
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Summary
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The study discusses a case of severe placentitis and horse abortion linked with an infection caused by the bacterium Pantoea agglomerans in southern Brazil.
About Pantoea agglomerans
- Pantoea agglomerans is a type of gram-negative bacterium from the Enterobacteriaceae family.
- This bacterium can typically be found in the soil and on plants.
- It has been linked to diseases impacting plants and humans, and on rare occasions, domestic animals.
The Case Study
- In the studied case, a 10-month old fetus and its placenta were examined.
- Disease indicators were identified in the cervical star, extending to the body of the chorioallantois. This area had visibly thickened and discolored.
- Upon deeper inspection, it was noted that this region in the chorioallantois had suffered severe necrosis, a type of cell injury leading to their premature death in living tissues.
Findings and Conclusions
- The necrotic area was found to be infiltrated by an excessive amount of neutrophils, a type of immune cell, with a large presence of fibrin, a protein that aids in clotting, and leftover cell debris. There were also moderate amounts of bacterial rods in the inflamed areas.
- No significant lesions were discerned in any other organs that were inspected.
- When lung, placenta, and stomach content tissue samples were subjected to microbiology tests, P. agglomerans growth was found in all tested samples.
- The study concludes by reinforcing the role of P. agglomerans as a causal factor in bacterial placentitis and abortion in horses.
Cite This Article
APA
Henker LC, Lorenzett MP, Keller A, Siqueira FM, Driemeier D, Pavarini SP.
(2020).
Fibrinonecrotic Placentitis and Abortion Associated With Pantoea agglomerans Infection in a Mare.
J Equine Vet Sci, 92, 103156.
https://doi.org/10.1016/j.jevs.2020.103156 Publication
Researcher Affiliations
- Department of Veterinary Pathology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil. Electronic address: henkerluan@hotmail.com.
- Department of Veterinary Pathology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
- Horse Veterinarian Independent Consultant, Porto Alegre, Brazil.
- Laboratory of Veterinary Bacteriology, UFRGS, Porto Alegre, Brazil.
- Department of Veterinary Pathology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
- Department of Veterinary Pathology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
MeSH Terms
- Animals
- Brazil
- Chorioamnionitis / veterinary
- Female
- Horse Diseases
- Horses
- Pantoea
- Placenta
- Placenta Diseases / veterinary
- Pregnancy
Citations
This article has been cited 4 times.- Wang T, Xi C, Yu Y, Liu W, Akhtar MF, Li Y, Wang C, Li L. Characteristics and epidemiological investigation of equid herpesvirus 8 in donkeys in Shandong, China.. Arch Virol 2023 Mar 4;168(3):99.
- Feijo FMC, Fernandes FDC, Alves ND, Pimenta AS, Santos CS, Rodrigues GSO, Pereira AF, Benicio LDM, Moura YBF. Efficiency of Pyroligneous Extract from Jurema Preta (Mimosa tenuiflora [Willd.] Poiret) as an Antiseptic in Cats (Felis catus) Subjected to Ovariosalpingohysterectomy.. Animals (Basel) 2022 Sep 7;12(18).
- Akter R, El-Hage CM, Sansom FM, Carrick J, Devlin JM, Legione AR. Metagenomic investigation of potential abortigenic pathogens in foetal tissues from Australian horses.. BMC Genomics 2021 Oct 2;22(1):713.
- Dong H, Liu B, Li A, Iqbal M, Mehmood K, Jamil T, Chang YF, Zhang H, Wu Q. Microbiome Analysis Reveals the Attenuation Effect of Lactobacillus From Yaks on Diarrhea via Modulation of Gut Microbiota.. Front Cell Infect Microbiol 2020;10:610781.
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