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An atypical case of respiratory actinobacillosis in a cow.

Angelo P, Alessandro S, Noemi R, Giuliano B, Filippo S, Marco P - J. Vet. Sci. (2009)

Bottom Line: Histologic examination revealed a chronic pyogranulomatous inflammation with eosinophilic club-like bodies surrounding small colonies of rod-shaped bacteria.Results of histochemical staining were consistent with Actinobacillus-like bacteria and a diagnosis of respiratory actinobacillosis was reached.Surgery and antibiotic therapy were resolutive, as demonstated by an endoscopic check at the second month after surgery, even without the association of the traditional iodine cure, which is regarded as the treatment of choice for actinobacillosis.

View Article: PubMed Central - PubMed

Affiliation: Departments of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Alma Mater Studiorum - University of Bologna, Italy.

ABSTRACT
A not pregnant 4-year-old Jersey cow was presented with the sudden appearance of respiratory noise, nasal discharge and moderate respiratory difficulty. Upon physical examination a snoring-like noise, extended head and neck position, exaggerated abdominal effort, bilateral nasal discharge and left prescapular lymph node enlargement were noted. Sub-occlusion of the initial portion of the respiratory tract was suspected. Radiographic and endoscopic examinations revealed a pedunculate mass on the dorsal aspect of the rhinopharynx, which was removed with endoscopically assisted electrosurgery. Histologic examination revealed a chronic pyogranulomatous inflammation with eosinophilic club-like bodies surrounding small colonies of rod-shaped bacteria. Results of histochemical staining were consistent with Actinobacillus-like bacteria and a diagnosis of respiratory actinobacillosis was reached. Surgery and antibiotic therapy were resolutive, as demonstated by an endoscopic check at the second month after surgery, even without the association of the traditional iodine cure, which is regarded as the treatment of choice for actinobacillosis.

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Rhinopharyngeal actinogranuloma. The mass is composed of fibrous tissue and multiple confluent pyogranuloma. H&E stain, ×100.
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Figure 2: Rhinopharyngeal actinogranuloma. The mass is composed of fibrous tissue and multiple confluent pyogranuloma. H&E stain, ×100.

Mentions: Histopathology of hematoxylin and eosin stained sections from formalin-fixed and paraffin-embedded samples demonstrated that the mass was composed of fibrous tissue and multiple confluent pyogranulomas containing small colonies of rod-shaped bacteria surrounded by eosinophilic club-like bodies (Figs. 2 and 3). Gram and Ziehl-Neelsen stains for acid-fast organisms were then carried out; results were Gram-negative and non-acid-fast, respectively. Accordingly, a histological diagnosis of chronic pyogranulomatous inflammation caused by Actinobacillus-like bacteria (probably A. lignieresii) was reached.


An atypical case of respiratory actinobacillosis in a cow.

Angelo P, Alessandro S, Noemi R, Giuliano B, Filippo S, Marco P - J. Vet. Sci. (2009)

Rhinopharyngeal actinogranuloma. The mass is composed of fibrous tissue and multiple confluent pyogranuloma. H&E stain, ×100.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2801135&req=5

Figure 2: Rhinopharyngeal actinogranuloma. The mass is composed of fibrous tissue and multiple confluent pyogranuloma. H&E stain, ×100.
Mentions: Histopathology of hematoxylin and eosin stained sections from formalin-fixed and paraffin-embedded samples demonstrated that the mass was composed of fibrous tissue and multiple confluent pyogranulomas containing small colonies of rod-shaped bacteria surrounded by eosinophilic club-like bodies (Figs. 2 and 3). Gram and Ziehl-Neelsen stains for acid-fast organisms were then carried out; results were Gram-negative and non-acid-fast, respectively. Accordingly, a histological diagnosis of chronic pyogranulomatous inflammation caused by Actinobacillus-like bacteria (probably A. lignieresii) was reached.

Bottom Line: Histologic examination revealed a chronic pyogranulomatous inflammation with eosinophilic club-like bodies surrounding small colonies of rod-shaped bacteria.Results of histochemical staining were consistent with Actinobacillus-like bacteria and a diagnosis of respiratory actinobacillosis was reached.Surgery and antibiotic therapy were resolutive, as demonstated by an endoscopic check at the second month after surgery, even without the association of the traditional iodine cure, which is regarded as the treatment of choice for actinobacillosis.

View Article: PubMed Central - PubMed

Affiliation: Departments of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Alma Mater Studiorum - University of Bologna, Italy.

ABSTRACT
A not pregnant 4-year-old Jersey cow was presented with the sudden appearance of respiratory noise, nasal discharge and moderate respiratory difficulty. Upon physical examination a snoring-like noise, extended head and neck position, exaggerated abdominal effort, bilateral nasal discharge and left prescapular lymph node enlargement were noted. Sub-occlusion of the initial portion of the respiratory tract was suspected. Radiographic and endoscopic examinations revealed a pedunculate mass on the dorsal aspect of the rhinopharynx, which was removed with endoscopically assisted electrosurgery. Histologic examination revealed a chronic pyogranulomatous inflammation with eosinophilic club-like bodies surrounding small colonies of rod-shaped bacteria. Results of histochemical staining were consistent with Actinobacillus-like bacteria and a diagnosis of respiratory actinobacillosis was reached. Surgery and antibiotic therapy were resolutive, as demonstated by an endoscopic check at the second month after surgery, even without the association of the traditional iodine cure, which is regarded as the treatment of choice for actinobacillosis.

Show MeSH
Related in: MedlinePlus