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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Jul 2021, 42 (4)                                     Back

nstantaneous and historical temperature effects on a-pinene

Systemic mycobacteriosis along with concurrent fibroma in Goldfish, Carassius auratus from India


T. R. Swaminathan1, N. Sood2*, P. K. Pradhan2, M. K. Yadav2, R. Kumar1, D. K. Verma2, R. Pal2, A. Dharmaratnam1 and N. K. Sood3 

1Peninsular and Marine Fish Genetic Resources Centre, ICAR-NBFGR, CMFRI Campus, Kochi-682 018, India

2Fish Health Management and Exotics Division, ICAR-National Bureau of Fish Genetic Resources, Lucknow-226 002, India

3Department of Teaching Veterinary Clinical Complex, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana-141 012, India

*Corresponding Author Email :


Received: 28.08.2020                                                            Revised: 26.03.2021                                                           Accepted: 03.05.2021




Aim: Goldfish (Carassius auratus L.), a freshwater fish belonging to the family Cyprinidae, is an important ornamental fish species in the world. Herewith, we report a case of systemic mycobacteriosis along with concurrent fibroma in goldfish.

Methodology: The protruding mass and internal organs exhibiting lesions were collected for histopathology and molecular diagnosis. The sections of cutaneous mass were stained with haematoxylin and eosin (H&E) and Masson trichrome, whereas sections from spleen as well as kidney were stained with H&E and Ziehl-Neelsen. For identifying the etiological agent, 16S rRNA gene fragment was amplified and sequenced, using genus-specific primers for Mycobacterium sp.

Results: In histopathology, multiple granulomas could be observed in kidney and spleen sections. Importantly, typical acid-fast bacilli were demonstrated in granulomas in spleen. The sequence of 16S rRNA gene fragment amplified from spleen and kidney showed maximum similarity to Mycobacterium stomatepiae. Besides, the histopathological characteristics of the protruding mass were consistent with cutaneous fibroma.      

Interpretation: These findings assume significance as several Mycobacterium species, including the current one from ornamental fish are reported to be of zoonotic significance.

Key words: Fibroma; Goldfish; Granuloma; Mycobacteriosis, 16S rRNA gene




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