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At least 19 recordsLinked to original sources
PubMed1989

The occurrence of lesions in the tongue of adult cattle and their implications for the development of actinobacillosis.

The occurrence of lesions on the tongue and the concurrence of actinobacillosis was investigated in samples consisting of totally 2,423 corpora and 947 apices linguarum of adult cattle. The investigation was made as an extended recording in connection with routine meat inspection. The diagnosis actinobacillosis is an assessment made on the gross pathological findings confirmed by consistent results of randomised samplings for histopathological and microbiological examination. The sampling was found to be representative of the mean of the phenomena investigated, and the samples were submitted to statistical analysis. Actinobacillosis was found in 2% of the lesions of the corpus as well as the apex, and the frequency on all tongues was 0.7%. These results are compared to previous findings. The importance of initial lesions for the development of actinobacilosis, and some factors predisposing for lesion infliction are discussed on the basis of the present results and literature sources. It is concluded, that there is a connection between primary lesions and actinobacillosis.

Actinobacillosis↗
PubMed1990

Suspected actinobacillosis manifested by facial enlargement in a heifer.

Actinobacillosis was the suspected cause of severe, bilateral facial enlargement of 8 months' duration in a 2.5-year-old Holstein heifer. Serum protein electrophoresis revealed a polyclonal gammopathy. Necropsy findings indicated that facial swelling was caused by fibrosis between the skin and underlying bone. Lesions were characterized microscopically by scattered pyogranulomas containing eosinophilic, club-like colonies surrounding gram-negative bacterial rods. The lesion was compatible with diagnosis of actinobacillosis. It is unusual for severe bilateral facial enlargement to be associated with actinobacillosis.

Actinobacillosis↗
PubMed1980

A histological and ultrastructural comparison of the sulfur granule of the actinomycosis and actinobacillosis.

The sulfur granules of actinomycosis and actinobacillosis were studied histologically and ultrastructurally. The sulfur granule of actinomycosis was large, and oval or horsehoe-shaped. In it, there were a number of gram-positive, filamentous or short rod-like hyphae beneath clubs. Ultrastructurally, the center of the sulfur granule was composed of a cluster of hyphae, and the periphery was surrounded by clubs arranged radially. The clubs were made of electron-dense fine granules and had a degenerated hypha at the center. These granules varied in amount from small to large. As for the host reaction, neutrophil infiltration appeared first around the sulfur granule. Then epithelioid cells proliferated and phagocytized hyphae. Finally, proliferating fibroblasts enclosed them and formed tiny granulomas. The sulfur granule of actinobacillosis was small and lobulated. In it, a number of gram-negative, short rod-like bacteria were present beneath clubs. Ultrastructurally, the center of the sulfur granule contained intact or degenerated bacteria, and the periphery was composed of radially projecting clubs. These clubs were made of electron-dense amorphous material, in which several layers of tubular structures surrounded the bacterium conentrically. The host reaction was almost the same as that of actinomycosis. The proliferation of fibroblasts was prominent. There was a strong tendency for these cells to form many tiny granulomas.

Actinobacillosis↗
PubMed1995

An atypical case of actinobacillosis in a cow.

An atypical case of actinobacillosis with involvement of the skin of the right hind limb and its lymphatics was diagnosed in a cow. The granulomatous lesions were observed as several masses along the lateral part of the right hind limb. The right precrural lymph node was enlarged more than 10 times its normal size. Histopathological examination of biopsy materials revealed actinobacillus granuloma. Smears of granular pus obtained from the precrural lymph node showed a small number of gram negative bacilli.

Actinobacillosis↗
PubMed1975

An unusual epizootic of actinobacillosis in dairy heifers.

Actinobacillosis developed in a group of 52 Holstein-Friesian replacement heifers. They were confined to 4 pens in a barn. Cervical abscesses were first observed by the owner in 1 heifer a month after the heifers were fed chopped haylage that was particularly dry, tough, and stemmy. During the weeks that followed, morbidity reached 73% in heifers given the feed. Calves up to 4 months old were not given the haylage and did not develop the disease. Standard bacteriologic methods were used to identify Actinobacillus lignieresii from exudate of abscesses. A biopsy of superficial granulomatous tissue of the lips revealed fibers thought to be of plant origin. Affected cattle recovered in 3 to 6 months. The lesions of 3 cattle given sodium iodide intravenously and of 4 given streptomycin regressed sooner than those given penicillin or no treatment.

Abscess↗
PubMed1988

Atypical actinobacillosis granulomas in cattle.

Actinobacillus lignieresii is well recognized as the cause of "wooden tongue." We have encountered Actinobacillosis as the cause of granulomas in unusual locations. These lesions have been confused with neoplasms, nasal polyps, or exuberant granulation tissue. Four such cases constitute this report.

Actinobacillosis↗
PubMed1992

Actinobacillosis in bovine caesarean sections.

An infection with Actinobacillus lignieresii, which was spread by a veterinary surgeon, caused problems after caesarean sections in cows on several farms. The wounds became hard about six weeks after the operation, and a few weeks later small abscesses developed and later the wounds were covered with small and large granulomas. The general health of about 20 per cent of the affected cows was poor and in these cows multiple granulomas could be detected in the abdomen by rectal palpation.

Actinobacillosis↗
PubMed1988

Actinobacillosis in free-ranging snowshoe hares (Lepus americanus) from Alaska.

Actinobacillus capsulatus was isolated from lung, liver, and/or spleen tissue of three snowshoe hares (Lepus americanus) in Alaska. This is the first report of the isolation of this bacterium from free-ranging hares. Actinobacillus capsulatus may have a negative impact on the population density of hares.

Actinobacillosis↗