Enhanced Asymptomatic Systemic Infection Caused by <i>Plesiomonas shigelloides</i> in a Captive Gray Wolf (<i>Canis lupus</i>)

A 7-year-old male gray wolf was found dead at a zoo during exhibition. To determine the cause of death, histological and gross necropsy diagnoses and a molecular analysis were performed. The gross necropsy revealed a swollen abdomen, hemorrhagic exudates around the mouth, splenomegaly, a discolored...

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Bibliographic Details
Main Authors: Kyoo-Tae Kim, Haeseung Lee, Dongmi Kwak
Format: article
Language:EN
Published: MDPI AG 2021
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Online Access:https://doaj.org/article/5f70e9e0b7c247b2a4e8c6a4dbe26e03
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Summary:A 7-year-old male gray wolf was found dead at a zoo during exhibition. To determine the cause of death, histological and gross necropsy diagnoses and a molecular analysis were performed. The gross necropsy revealed a swollen abdomen, hemorrhagic exudates around the mouth, splenomegaly, a discolored liver, a congested kidney, hemorrhagic ascites, and dark gray-colored membranes and air bubbles in the fundus of the stomach. Rod-shaped bacteria were found in the liver parenchyma and hemorrhagic ascites using Giemsa staining. The nucleotide sequencing of the cultured bacteria identified the causative agent as <i>Plesiomonas shigelloides</i>, which is rarely responsible for systemic infections. This study describes a rare case and the first reported systemic gastrointestinal infection due to <i>P. shigelloides</i> in a zoo animal.