レプトスピラ抗体陽性犬15頭の臨床症状

福岡県　開業（〒814-0163　福岡市早良区干隈4-17-11）

要　　　　　約 　 レプトスピラ抗体陽性であった犬15頭の臨床所見を調査した．レプトスピラ抗体陽性犬は福岡市周辺部にて多く見られ，感染犬種もシーズー，ミニチュアダックス，マルチーズ等の小型愛玩犬種が過半数を占めた．患畜の年齢分布は生後3カ月齢から14歳齢にわたり，年齢によるかたよりはみられなかった．本疾患に典型的な症状とされる腎不全，肝障害および黄疸等はあまり認められず，3日以上持続する食欲低下，嘔吐および軟便といった消化器症状がほとんどの症例で認められた．また体動に伴って見られる疼痛や跛行，全身性の強直性発作等の神経症状も一部の症例で認められた．今回抗体を測定したLeptospira hebdomadis，L. canicola，L. icterohaemorrhagiaeの3血清型において，抗体価が高値を示したのはL. icterohaemorrhagiaeとL. hebdomadisであった．また，本病と診断された未避妊雌5頭中3頭では子宮蓄膿症を併発していたため，子宮蓄膿症によりレプトスピラ感染が隠蔽化される可能性が示唆された． ―キーワード：臨床症状，犬，レプトスピラ感染． -------------------日獣会誌　56，812〜816（2003） Clinical Findings of 15 Dogs Serologically Positive for Canine Leptospirosis Eiichiro FUCHIGAMI† Saint Noah Animal Hospital, 4-17-11 Hosiguma, Sawaraku, Fukuoka, 814-0163, Japan SUMMARY 　Clinical investigations of 15 dogs serologically positive for canine leptospirosis showed that many animals with positive titers lived in the Fukuoka urban area. More than half of the infected dogs were such miniature or toy breeds as shih tzu, miniature dachshund, and Maltese. Their ages ranged from 3 months to 14 years without deviation. Most of their clinical signs involved disorders of the digestive system : anorexia for more than 3 days, vomiting, and diarrhea. Although they are thought to be typical of canine leptospirosis, renal features, liver-function disorder, and jaundice, were rarely observed. Neurological symptoms including motion-induced pain and general tonic convulsions were observed in a few cases. High titers of antibodies against L. icterohaemorrhagiae and L. hebdomadis were observed. The presence of pyometra in three of five unspayed bitches suggested that this condition may conceal leptospirosis. ―Key words : clinical findings, dog, leptospira infection. †　Correspondence to : Eiichiro FUCHIGAMI (Saint Noah Animal Hospital) 4-17-11 Hosiguma, Sawaraku, Fukuoka, 814-0163, Japan TEL 092-865-6666 FAX 092-864-7778 --------------------J. Jpn. Vet. Med. Assoc., 56, 812〜816 (2003)