放牧育成牛の消化管内線虫に対するイベルメクチン製剤の効果  [in Japanese] Deworming Effect of Ivermectin on Gastrointestinal Nematodes in Holstein Heifers on Pasture  [in Japanese]

Access this Article

Author(s)

Abstract

ホルスタイン放牧育成牛 (6~17カ月齢) 29頭に対して入牧後28および60日にイベルメクチン (IVM) 製剤を投与 (200μg/kg頸部皮下) し, 放牧期間 (1995年5~10月) 中, 無投与の15頭を対照として駆虫効果, 血清生化学検査値の変動および経済効果を調べた. IVM群の消化管内線虫卵数は明らかに低く推移し, 増体日量は有意に高かった. 無投与群の8月の血清ペプシノーゲン濃度はIVM投与群に比べて有意な高値を示し, 6月~8月にIVM投与群の血清アルブミン濃度は無投与群より有意に高かった. また, IVM投与群では無投与群に比べて初回人工授精時日齢は27日若く, 両群間の性成熟の差が示唆され, IVM製剤投与による費用・便益比は1: 1.52と試算された.

Six-to 17-month-old Holstein heifers pastured during the period of May to October in 1995 in Iwate Prefecture, were subjected to evaluation of deworming effects of ivermectin (IVM). The prevalent nematode species were <I>Ostertagia ostertage, Trichostrongylus</I> sp., <I>Cooperia</I> sp., <I>Strongyloides papillosus</I> and <I>Oesophagostomum</I> sp. On days 28 and 60 of pasture, 29 of 44 heifers were treated with IVM (0.2mg/kg s.c.), and the remaining 15 remained untreated. In the treated heifers the egg counts of rectal feces were remarkably decreased after the first treatment. Weight gain during pasturing was significantly higher in the treated heifers than controls. In August, serum pepsinogen concentrations were significantly higher in controls, and from June to August serum albumin concentrations were significantly higher in the treated heifers than controls. Moreover, the treated heifers were able to be artificially inseminated about one month earlier than controls, and the costbenefit ratio of IVM treatment was caluculated to be 1: 1.52.

Journal

  • Journal of the Japan Veterinary Medical Association

    Journal of the Japan Veterinary Medical Association 51(5), 237-240, 1998-05-20

    Japan Veterinary Medical Association

References:  23

Codes

  • NII Article ID (NAID)
    10018949040
  • NII NACSIS-CAT ID (NCID)
    AN00191857
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    04466454
  • NDL Article ID
    4482293
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-352
  • Data Source
    CJP  NDL  J-STAGE  JASI 
Page Top