Discovery of a Highly Virulent Strain of Photorhabdus luminescens ssp. akhurstii from Meghalaya, India

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• 作者：Jyoti Kushwah ; Puneet Kumar ; Veena Garg…
• 关键词：Photorhabdus ; Injectable toxicity ; Virulence ; Heterorhabditis ; Galleria ; Meghalaya
• 刊名：Indian Journal of Microbiology
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：57
• 期：1
• 页码：125-128
• 全文大小：
• 刊物主题：Microbiology; Medical Microbiology;
• 出版者：Springer India
• ISSN：0973-7715
• 卷排序：57

文摘

Photorhabdus is an insect-pathogenic Gram negative enterobacterium found in the gut of Heterorhabditis nematodes. Photorhabdus is highly virulent to insects, and can kill insects rapidly upon injection at very low concentrations of one to few cells. We characterized the virulence of Photorhabdus symbionts isolated from the Heterorhabditis nematodes collected from various parts of India by injecting different concentrations of bacterial cells into fourth instar larval stage of insect Galleria mellonella. Photorhabdus luminescens ssp. akhurstii strain IARI-SGMG3 from Meghalaya was identified as the most virulent of all the tested strains on the basis of LT₅₀ and LC₅₀ values. This study forms a basis for further investigations on the genetic basis of virulence in Photorhabdus bacteria.