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  • Title: Eubacterial fluorescence in situ hybridisation and histologic features in 25 dogs with gallbladder mucocele.
    Author: Wennogle SA, Randall EK, Priestnall SL, Twedt DC, Simpson KW.
    Journal: J Small Anim Pract; 2019 May; 60(5):291-297. PubMed ID: 30740720.
    Abstract:
    OBJECTIVES: To detect and localise bacteria in gallbladder mucoceles using fluorescence in situ hybridisation (FISH). To report clinical signs, clinicopathologic abnormalities, sonographic findings and histopathological findings in FISH+ and FISH- dogs with gallbladder mucoceles. MATERIALS AND METHODS: Retrospective review of signalment, clinical signs, clinicopathologic and sonographic findings of 25 cases of histopathologically confirmed gallbladder mucocele. Histopathological sections of gallbladder mucocele were evaluated for cystic mucinous hyperplasia, cystic mucinous hyperplasia with cholecystitis and rupture. The number and spatial distribution of bacteria was determined by eubacterial FISH. Gallbladder contents were cultured in 21 dogs. RESULTS: Bacteria were detected within or adherent to the gallbladder wall in eight of 25 (32%) cases. Bacterial culture was positive in one dog. Cystic mucinous hyperplasia with concurrent cholecystitis was found in 17 of 25 (68%) of dogs with gallbladder mucocele. CLINICAL SIGNIFICANCE: FISH was more sensitive for detection of bacteria in gallbladder mucoceles when compared to bacterial culture of bile. Cholecystitis was common in dogs with gallbladder mucocele. Further study is required to elucidate the relationship of cystic mucinous hyperplasia, bacteria and cholecystitis in the aetiopathogenesis and progression of gallbladder mucocele.
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