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要 約
育成乳牛の細菌性心内膜炎2例について，臨床所見の観察とあわせて，断層心エコー法により疣贅形態の経時的変化を評価した．疣贅は，いずれも観察開始当初から高エコー像を呈し，エコー源性は次第に増強傾向を示した．また，漸次増強する音響陰影が出現した．これらの所見から，いずれの疣贅も観察開始時にはすでに器質化の過程をとっており，その進展に伴って石灰化が徐々に進行したものと判断され，病理組織学的所見からも裏付けられた．加えて，扁平化や縮小化を示した疣贅も認められた．以上の所見は感染の緩解に一致するものであり，顕著な変化が認められず異常なく推移した臨床所見や血液所見からも支持され，疣贅形態が変化する過程を超音波学的に実証したものと考えられた．
―キーワード：細菌性心内膜炎，育成乳牛，経時的観察，断層心エコー法，疣贅．
--------------------日獣会誌 54，537〜541（2001）
Long-term Serial Echocardiographic Evaluation of Holstein Dairy Heifers with
Bacterial Endocarditis
Akira HONMA＊†, Kazuro MIYAHARA, Akihito SHIRAI, KazutakaYAMADA, Tsuneo HIROSE and Motoyoshi
SATO
＊Obihiro University of Agriculture and Veterinary Medicine, Nishi 2, Inada-cho, Obihiro 080-8555,
Japan
SUMMARY
Two-dimensional echocardiography was performed on two Holstein dairy heifers with bacterial endocarditis
to investigate changes in the echocardiographic features of vegetations and to observe alterations in
clinical signs. At first examination, all vegetations revealed already hyper-echoic masses. Thereafter,
vegetation echogenicity tended to increase gradually. In addition, vegetative lesions demonstrated acoustic
shadows that appeared more intense during observations. In one vegetation, lesion smoothing and contraction
were ob-served. These findings showed that vegetative lesions were in the organizing process at the beginning
of observation and that mineralization progressed gradually as organization advanced. Clinical and laboratory
findings failed to recognize this as a conspicuous abnormality, thus supporting our interpretation and
confirming pathological findings. Apparently, the vegetation echocardiographic features observed in this
study were consistent with the resolution of the infection.
―Key words :bacterial endocarditis, dairy heifers, long-term serial evaluation, two-dimensional echocardiography,
vegetation.
| † Correspondence to : |
Akira HONMA (Kushiro-district Agricultural Mutual Aid Association)
10-25 Kaiun, Shibecha-cho, Kawakami-gun, Hokkaido 088-2311, Japan
TEL 01548-5-3062 FAX 01548-5-2684
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-------------------- J. Jpn. Vet. Med. Assoc.，54，537〜541（2001） |
