採卵鶏農場におけるSalmonellaの疫学調査  [in Japanese] Epidemiological Investigation of Salmonella Species Contamination in Poultry Farms  [in Japanese]

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Abstract

1998~2000年に, 7採卵鶏農場において鶏と鶏舎環境973検体から<I>Salmonella</I>の分離と, 分離菌の血清型別, 薬剤感受性試験およびプラスミドプロファイルを実施した。農家別の<I>Salmonella</I>陽性率は3.1%~24.1%, 全体では12.3%で, 年次ごとに特に鶏舎環境からの分離率が著しく増加した。検体別では鶏舎環境 (床塵埃等) で最も高く35.1%, 鼠23.1%, 衛生害虫 (ハエ, ゴキブリ) と鶏舎内餌・水は5%前後, 鶏クロアカスワブ3.3%, また導入雛, 卵殻および廃鶏については検出されなかった。S.Bareilly, S.Weltevreden, S.Entritidisなど18種もの血清型が確認された。鶏クロアカスワブから分離された血清型は, 全て同一農家の床塵埃からも分離された。分離<I>Salmaonella</I>の薬剤耐性頻度は低く, 71株中64株 (90%) が11薬剤全てに感受性だった。耐性パターンはテトラサイクリン, アンピシリン, カナマイシンおよびストレプトマイシンに対する単剤耐性で, 各農家に共通するパターンはなかった。分離<I>Salmonella</I>115株中プラスミドを保有していたのは59株 (51%) だった。特にS.Weltevredenのプラスミドプロファイルは6種類に分類され, 鶏クロアカスワブ由来株と鶏舎環境 (床塵埃等) 由来株に共通する2タイプが確認された。

During 1998 and 2000, the prevalence, serotypes, susceptibility to antimicrobial drugs and plasmid-profle of <I>Salmonella</I> were examined using 973 layer-environment samples obtained from 7 poultry farms. The prevalence of <I>Salmonella</I> at each of the farms were between 3.1 and 24.1 % and overall prevalence was 12.3 %. Salmonellal isolation rates from the environment increased drastically during the study period. Salmonellal isolation rates were 35.1 % in the accumulated dust, 23.1 % in rats, 5 % in sanitary insects such as flies and cockroaches, 5 % in feed and water and 3.8 % in cloacal swabs. <I>Salmonella</I> was not isolated from introduced chicks, eggshells and replaced chicken. Isolates were classified into 18 serotypes, such as Bareilly, Weltevreden, Enteritidis, etc. The serotypes of <I>Salmonella</I> obtained from cloacal swab samples were also obtained from the same flock environment. Of the 71 isolates, 64 (90 %) were susceptible to all 11 antimicrobial drugs tested and the remaining 7 strains were uni-resistant to the drugs such as tetracycline, ampicillin, kanamycin or streptomycin respectively and no particular common drugs resistant patterns among farms were identified. Among 115 <I>Salmonella</I> isolates, there were 59 isolates (51 %) that harbored plasmids. By plasmid-profile examination, S. Wertevreden isolates were classified into 6 groups and 2 types were common between cloacal and flock environment samples.

Journal

  • Journal of Veterinary Epidemiology

    Journal of Veterinary Epidemiology 5(1), 31-36, 2001-06-20

    The Japan Society of Veterinary Epidemiology

References:  8

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008025012
  • NII NACSIS-CAT ID (NCID)
    AA11157349
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13432583
  • NDL Article ID
    5855950
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-B556
  • Data Source
    CJP  CJPref  NDL  J-STAGE  JASI 
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