青森県八戸地域の飼育成犬の消化管内寄生線虫

かもめ獣医科医院（〒039-1208　青森県三戸郡階上町角柄折字蒼前9-2932）

（1998年12月24日受付・1999年5月6日受理）

要　　　　　約 　青森県八戸地域の一般家庭で飼育されていた成犬（1歳以上）1,275頭の消化管内寄生線虫を調べ，同時に飼育環境，犬種，年齢および性別について調査した．室内飼育犬354頭には消化管内線虫の寄生が認められなかったが，一般犬種の室外飼育犬834頭中95頭（11.4％）に寄生が認められ，土佐犬では87頭中33頭（37.9％）に寄生が認められた．おもな寄生虫は犬鞭虫で，土佐犬を除いて犬鉤虫は少なく，犬回虫は1歳例（群）のみに少数の寄生が認められた．雄犬の寄生率は雌犬より高く，また，年齢別では1歳例に比較して3〜4歳例で寄生率が著明に高かった． ―キーワード：消化管内線虫，犬鉤虫，犬鞭虫，犬回虫． --------------------日獣会誌　52，649〜653（1999） Survey on Nematode in the Digestive Tract of Adult Dogs Reared in Hachinohe Area, Aomori Prefecture Naoyuki ITOH and Sayako ITOH Kamome Veterinary Clinic, 9-2932 Sozen, Tsunogaraori, Hashikami, Sannohe, Aomori 039-1208, Japan SUMMARY 　A total of 1,275 adult dogs aged over 1 year were investigated for nematode in the digestive tract. While no parasites were detected in the indoor kept 354 dogs, 95 of 834 (11.4％) outdoor dogs were shown to have parasites, and the Tosa breed dog showed a higher parasitic rate of 37.9％. The most frequent parasite was Trichuris vulpis, and only a few cases were of Ancylostoma caninum except for a high frequency in the Tosa breed. Toxocara canis was detected from a few 1-year-old cases. The parasitic rate was higher in males than females and was markedly higher in 3 to 4-year-old cases as compared to 1-year-old cases. ―Key words : Intestinal nematode, Ancylostoma caninum, Trichuris vulpis, Toxocara canis. --------------------J. Jpn. Vet. Med. Assoc., 52, 649〜653 (1999)