CHARACTERS OF STAPHYLOCOCCI ISOLATED FROM DEAD CHICK EMBRYOS AND FROM PATHOLOGICAL CONDITIONS IN CHICKENS
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概要
- 論文の詳細を見る
Some investigations were carried out on the staphylococci isolated from dead-in-shell chick embryos and from diseased chickens. The results obtained are summarized as follows : 1. Staphylococci were isolated from the yolks of 49 (1.4%) out of 3,463 dead embryos collected from 11 hatcheries. 2. Eighteen (45%) of the isolated 40 strains were coagulase-positive. 3. One of 92 samples of chick down in incubator collected from 19 hatcheries yielded coagulase-positive staphylococci. 4. Coagulase-positive strains from dead chick embryos and from chicken lesions indicated characteristics of Staphylococcus aureus (BERGEY'S Manual, 1957) and were pathogenic for chickens. 5. A part of the strains from chicken lesions were weak or labile in coagulase production, and they appeared to be low or non-pathogenic. Some of them showed atypical biological characteristics. In addition, one of them differed in serological character from coagulase-positive strains from chicken lesion or embryos. 6. Thirty-two (45.1%) of 71 strains (34 coagulase-positive and 37 negative) which were isolated from dead chick embryos, chicken lesions, secondary infection in fowl pox and chick down were susceptible to the phages of the International Series. Six of the susceptible strains were typable as follows ; Type I (1 strain), Type III (4) and Type II+III (one coagulase-negative strain from chick down). Lysogenicity was proven in a coagulase-negative strain from embryo. The phage of this strain was slightly active on most of the strains of coagulase-positive staphylococci of chicken origin. 7. From the results obtained from examination of dead embryos and of samples of chick down, Staphylococcus aureus seems to be inclined to occur only in a part of the hatches of some hatcheries.
- 北海道大学の論文
著者
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Miura Shiro
Department Of Epizootiology Faculty Of Veterinary Medicine Hokkaido University
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Sato Gihei
Laboratory Of Veterinary Hygiene And Microbiology Faculty Of Veterinary Medicine Hokkaido University
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Sato Gihei
Department Of Disease Control School Of Veterinary Medicine University Of Zambia
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Ito Akiharu
Department Of Epizootiology Faculty Of Veterinary Medicine Hokkaido University:(present Address) Nat
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Miyamae Takeo
Department Of Epizootiology Faculty Of Veterinary Medicine Hokkaido University
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NAKAGAWA Masaro
Department of Hygiene and Microbiology, Faculty of Veterinary Medicine, Hokkaido University
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Nakagawa Masaro
Department Of Epizootiology Faculty Of Veterinary Medicine Hokkaido University:(present Address) Nat
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Sato G.
Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University
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Miura S.
Department of Epizootiology Faculty of Veterinary Medicine Hokkaido University
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