Intraperitoneal actinomycosis in a cat

Kawamura, Naoshi; Shimada, Akinori; Morita, Takehito; Murakami, S; Azuma, Ryozo; Fujiwara, Motohatsu; Fujiwara, Ayako

doi:10.1136/vr.157.19.593

Cited by 14 publications

(10 citation statements)

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“…A denticolens was first isolated by Dent and Williams (1984) from dental plaque from heifers and subsequently from the gingival margins of healthy cats (Love and others 1990). A denticolens therefore belongs to the oral flora known as ‘plaque‐community’, which may be opportunistically involved in soft tissue lesions (Kawamura and others 2005). In horses, this flora is frequently recovered from the lower respiratory tract and paraoral infections (Bailey and Love 1991).…”

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confidence: 99%

Mandibular lymphadenopathy caused by Actinomyces denticolens mimicking strangles in three horses

Albini¹,

Korczak²,

Abril³

et al. 2008

Veterinary Record

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confidence: 99%

Mandibular lymphadenopathy caused by Actinomyces denticolens mimicking strangles in three horses

Albini¹,

Korczak²,

Abril³

et al. 2008

Veterinary Record

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“…Actinomyces species are Gram-positive, branching, filamentous bacteria, and are common inhabitants of the feline oral cavity and gastrointestinal tract [6]. In cats Actinomyces have been associated with some cases of ocular [7], nasal [8], intracranial [9], pleural [10], peritoneal [11, 12], ileocolic junction [13] subcutaneous [14] and lymph nodal [15] disease.…”

Section: Case Presentationmentioning

confidence: 99%

Gastric inflammatory pseudotumour secondary to Actinomyces hordeovulneris infection in a cat

et al. 2015

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BackgroundThe authors report the first case of feline gastric actinomycosis associated with infection by Actinomyces hordeovulneris.Case presentationA 4-year-old, neutered male, semi-feral European cat, with a 1 year history of chronic vomiting, was referred to the clinic. Abdominal ultrasound examination identified a hypoechoic focal transmural thickening with loss of normal wall layering and hyperechoic speckles at the gastric body. Initial gastroscopic examination showed a tumour-like gastric mass with an ulcerated depression at the level of the greater curvature. Histologic examination of endoscopic biopsy specimens was consistent with a severe lymphoplasmacytic gastritis. After 2 months, due to persistence of abdominal discomfort, surgical exploration and intraoperative sampling of gross abnormalities was recommended. Full thickness gastric wall biopsies, and fine needle aspiration of the gastric thickening and gastric lymph node, were performed. Histopathological examination identified a transmural pyogranulomatous gastritis. Aspirate samples of the gastric wall cultured positive, with colony morphology, biochemical testing and PCR of the 16 s rRNA gene compatible with Actinomyces hordeovulneris. After 4 months of treatment with cefovecin (8 mg/kg subcutaneously every 14 days), the vomiting completely resolved, as well as the ultrasonographic gastric alteration.ConclusionThis case report of feline gastric actinomycosis, caused by Actinomyces hordeovulneris, suggests that gastric bacterial infection should be considered in cases of focal gastric wall thickening associated with chronic vomiting in the cat, which may otherwise closely resemble neoplastic disease. Once a diagnosis of actinomycosis was obtained, a correct treatment with antibiotic therapy can resolve it.

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“…24 Typically, actinomycosis stains positive with both periodic acid-Schiff stain and Grocott's dye, as both are specific for carbohydrates that are found in the cell wall. 23,[25][26][27][28][29][30][31][32][33] These two positive stains distinguish actinomycosis from nocardiosis and streptomycosis. 34 The differential diagnosis will also include infection with mycobacteria.…”

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confidence: 99%