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Case Reports
. 2003 Feb;5(1):37-41.
doi: 10.1053/jfms.2002.0203.

Opportunistic mycobacterial granuloma in a cat associated with a member of the Mycobacterium terrae complex

S M Henderson  1 , J Baker, R Williams, D A Gunn-Moore
Affiliations
Case Reports

Opportunistic mycobacterial granuloma in a cat associated with a member of the Mycobacterium terrae complex

S M Henderson et al. J Feline Med Surg. 2003 Feb.

Abstract

An 18-month-old domestic short-haired neutered male cat presented with a nodular dermal thickening on a digit. Biopsy demonstrated pyogranulomatous inflammation with moderately frequent acid-fast bacilli. A member of theMycobacterium terrae complex was isolated. There was no evidence of systemic involvement. Treatment was initiated with enrofloxacin, rifampicin and clarithromycin. After 2 months there was no longer any clinically apparent dermal thickening. Treatment was continued for a further 3 months using enrofloxacin and rifampicin.

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Figures

Fig 1a
Fig 1a
Haemotoxylin and Eosin (x100). Histological examination of 5 μm sections stained with haematoxylin and eosin (H&E) showed expansion of the dermis and subcutis by a mass of pyogranulomatous inflammation. The histiocytes have a moderate amount of pale staining to eosinophilic cytoplasm and have hypochromic nuclei, often with a single nucleolus.
Fig 1b
Fig 1b
Ziehl-Neelsen (x250). Further sections were stained by the Ziehl Neelsen (ZN) technique and these demonstrated the presence of moderately abundant acid-fast bacilli within the foci of necrosis (arrow). These bacilli appear to form short chains.
See this image and copyright information in PMC

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