Clinical recognition and treatment of bovine cutaneous actinobacillosis

Abstract

Hypomagnesaemic tetany and composition ofbody fluids. Use of vitreous for the postmortem diagnosis of hypomagnesaemia. Annales Universitatis Mariae Curie Sklodowska. Sectio DD, Medicina Veterinaria 51, 179-198 TODD, J. R. (1965) The influences of soil type on the effectiveness of single dressings of magnesia in raising pasture magnesium content and in controlling hypomagnesaemia.

Atypical actinobacillosis in bulls in Argentina: granulomatous dermatitis and lymphadenitis

“…Due to the difficulties in the bacteriological diagnosis, histopathological examination of biopsies is usually helpful for the diagnosis of actinobacillosis (Milne et al 2001). The histopathological changes observed in the skin biopsy from the affected bull, were similar to the described in previous reports.…”

“…Sensitivity test confirmed that the A. lignieresii isolated from animal B was streptomycin and sulfonamide-sensitive, antibiotics usually used to treat these cases (Campbell et al 1975, Radostits et al 2007). Penicillin is also indicated for the treatment for actinobacillosis (Radostits et al 2007); however the isolate in this outbreak resulted penicillin-resistant, which has been reported before (Milne et al 2001). Other antibiotics identified as effective in controlling the growth of this particulate isolate could contribute with useful information about Actinobacillus treatment in other cases in different species.…”

“…Lymphadenitis and granulomatous inflammation affecting other tissues have been also reported (Rebhun et al 1988, Anderson et al 1990, Milne et al 2001, Radostits et al 2007). In the current report, granulomatous dermatitis and enlargement of several lymph nodes were observed in the affected animals.…”

“…The histopathological changes observed in the skin biopsy from the affected bull, were similar to the described in previous reports. Lesions of actinobacillosis have a very distinctive pattern, reported as Actinobacillus granulomas, which consist of neutrophils and club-like rosettes with a central mass of Gram negative bacilli (Splendore hoepli) surrounded by neutrophils, mononuclear cells and fibrosis (Anderson et al 1990, Aslani et al 1995, Rycroft & Garside 2000, Milne et al 2001, Radostits et al 2007, Hussein 2008, Angelo et al 2009, Taghipour Bazargani et al 2010.…”

“…Microscopically, pyogranulomas with club-like rosettes with central mass of bacteria surrounded by fibrosis after acute local inflammation are the most common features. In cattle, the classical presentation of infection affects the tongue ("wooden tongue"), but also soft tissues such as lymph nodes (retropharyngeal and submandibular) and other tissues of the head, pharynx, chest, flank, stomach, omentum and limbs can be affected (Abdul Rahman 1980, Aslani et al 1995, Milne et al 2001, Dirksen et al 2005, Radostits et al 2007, Taghipour Bazargani et al 2010. Atypical presentations in ruminants have been described in the muzzle, nasal cavity, cervical area, lungs, skin and subcutaneous tissues of eyelids and neck (Campbell et al 1975, Salamanco et al 1982, Rebhun et al 1988, Dirksen et al 2005, Radostits et al 2007, Angelo et al 2009, Peli et al 2009, Magnano et al 2010, Taghipour Bazargani et al 2010).…”