Histopathological Features of Mycobacterium chelonae Infection in Two Farmed Japanese Pufferfish (Takifugu rubripes)

Ishii, Yuji; Kawakami, Hidemasa; Mekata, Tohru; Sugiyama, Akihiko

doi:10.1016/j.jcpa.2019.06.003

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…M. chelonae infection has also been reported in zebrafish Danio rerio, Japanese pufferfish Takifugu rubripes, Atlantic guitarfish Rhinobatos lentiginosus. Atlantic salmon Salmo salar, Yellow perch Perca flavescens, Yellow stingray Urobatis jamaicensis, and Russian sturgeon Acipenser gueldenstaedtii [25][26][27][28][29][30][31]. Although many fish species can be infected with M. chelonae, studies have shown that there are differences in susceptibility to M. chelonae among different species and even different lines of the same species [32].…”

Section: Discussionmentioning

confidence: 99%

Identification of Mycobacterium chelonae from Lined Seahorse Hippocampus erectus and Histopathological Analysis

Bai

Hao²,

et al. 2023

Fishes

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The lined seahorse (Hippocampus erectus) is an aquacultural species in China and has important economic and ornamental value. However, the species is affected by disease, which restricts their large-scale cultivation. In 2021, a disease was observed in cultured seahorses in Tianjin, China, with a cumulative mortality rate of 20%. The symptoms observed in the moribund seahorse included a weak swimming capacity, discolored body surface, enlarged liver and kidneys, and numerous white nodules in the parenchymatous organs. The strains HM-2021-1 and HM-2021-2 were isolated from diseased seahorses and were identified as being responsible for the disease. It demonstrated the potential to infect seahorse, and the cumulative mortalities of the seahorses artificially infected with strains HM-2021-1 and HM-2021-2 were 93.3% and 90.0%. The pathogen was identified as Mycobacterium chelonae based on physiological and biochemical tests, and 16S rDNA, rpoB, and Hsp65 gene sequence analysis. To our knowledge, this study is the first report of M. chelonae associated with diseased seahorses in China.

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