人工飼料育蚕における細胞質多角体病の発病に及ぼす細菌の相互作用
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概要
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The larvae were reared on an artificial diet wetted with an antibiotic (streptomycin or penicillin) and a suspension of Serratia marcescens, which is a nonpathogenic bacterium to silkworm, at a high concentration (McFahland No. 3) from the 1st instar onwords. Thereafter the larvae were inoculated per os with cytoplasmic-polyhedrosis virus at the 3rd instar just after ecdysis. The incidence rate of the cytoplasmic polyhedrosis increased by co-infection with Serratia marcescens at a high concentration, but the rate decreased by addition of antibiotics.From these results, it was demonstrated that co-infection with a large amount of nonpathogenic bacteria, led to the increase of the incidence of cytoplasmic polyhedrosis. The synergistic effect of the bacteria was lost by addition of antibiotics.
- 日本蠶絲學會の論文
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