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  • Title: HELICOBACTER SCREENING OF GRAND CAYMAN BLUE IGUANA (CYCLURA LEWISI) AND NORTH ANTILLEAN SLIDER (TRACHEMYS DECUSSATA ANGUSTA) ON GRAND CAYMAN, CAYMAN ISLANDS.
    Author: Calle PP, McClave C, Ingerman K, Nightingale BR, Jamieson J, Seimon TA, Harding L.
    Journal: J Zoo Wildl Med; 2023 Jul; 54(2):332-335. PubMed ID: 37428696.
    Abstract:
    The endemic Grand Cayman or blue iguana (Cyclura lewisi) is endangered. Beginning in 2015 significant morbidity and mortality occurred in captive and wild blue iguanas within Grand Cayman's Queen Elizabeth II Botanic Park (QEIIBP). Investigation identified a novel Helicobacter sp., provisionally named Helicobacter sp. Grand Cayman Blue Iguana 1 (GCBI1), as the cause. Invasive green iguanas (Iguana iguana) are believed to play a role in GCBI1 transmission to the blue iguana; however, the origin and transmission pathways have not been determined. To assess the likelihood of blue iguanas asymptomatically harboring GCBI1, in May 2022 population-level screening of captive blue iguanas at QEIIBP was conducted on half (n = 102) of the captive blue iguana population (n = 201) including half of each age class. Helicobacter sp. GCBI1 is closely related to a chelonian Helicobacter sp. and 10 sympatric wild north Antillean sliders (Trachemys decussata angusta) were sampled in October 2019. Combined choana/cloacal swabs were screened by a GCBI1-specific quantitative polymerase chain reaction (qPCR) assay. All samples were negative, suggesting that GCBI1 is not present asymptomatically in the captive blue iguana population or in north Antillean sliders. These results provide support for the hypothesis that GCBI1 is periodically introduced to captive and wild blue iguanas from another species or source.
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