Observations on the Air-Borne Bacteria in Laboratory Animal Sections

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  • TAKAGAKI Yoshio
    <I>Division of Biology, Research Laboratories, Chugai Pharmaceutical Co. Ltd.</I>
  • NOGUCHI Goro
    <I>Division of Biology, Research Laboratories, Chugai Pharmaceutical Co. Ltd.</I>

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Other Title
  • 実験動物施設における空中細菌について
  • ジッケン ドウブツ シセツ ニ オケル クウチュウ サイキン ニ ツイテ

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Description

Some investigations were carried out on airborne bacteria in different parts of laboratories. The results are summarized as follows:<BR>1) The numbers of air-borne bacteria were much different among animal rooms under different conditions. (Fig. 2) .<BR>2) Bacterial number in the experimental room attained its maximum at daytime and its minimum at night (Fig. 5) . The mean number of air-borne bacteria in animal room however, was larger at night than at daytimes (Fig. 4) . The daily changes of bacterial number in the vestibule were similar to those in the experimental room (Fig.3) .<BR>3) The numbers of bacteria in animal rooms before and after introduction of animals was considerably different. (Fig.6 & 7) .<BR>4) The numbers of air-borne bacteria in the animal rooms differs with the species of animals. The highest contamination was observed in the rabbit room.<BR>5) The difference in number of bacteria between the levels of 170 cm and 20 cm distant from the floor was obserbed (Fig. 6 & 7) .<BR>6) Over 90 per cent of the contaminated bacteria were of underf fined micrococci, and the rests were of diphtheroids, coliforms and fungi (Table. 2) .

Journal

  • EXPERIMENTAL ANIMALS

    EXPERIMENTAL ANIMALS 17 (3), 109-117, 1968

    Japanese Association for Laboratory Animal Science

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