African Journal of
Bacteriology Research

  • Abbreviation: J. Bacteriol. Res.
  • Language: English
  • ISSN: 2006-9871
  • DOI: 10.5897/JBR
  • Start Year: 2009
  • Published Articles: 120

Full Length Research Paper

Isolation and identification of a pathogen, Providencia rettgeri, in Bombyx mori

Jiao Zhang1, Zhong-yuan Shen1,2,3*, Xu-dong Tang1,2, Li Xu1,2 and Feng Zhu1
    1Jiangsu University of Science and Technology, Zhenjiang 212018, Jiangsu Province, China.     2The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, Jiangsu Province, China.   3The Key Laboratory of Genetic Improvement of Silkworm and Mulberry of Agricultural Ministry, Zhenjiang 212018, Jiangsu Province, China.
Email: [email protected].

  •  Accepted: 25 February 2013
  •  Published: 28 February 2013



A Gram-negative, rod-shaped bacterium, SY-1 strain, was isolated from a naturally infected silkworm Bombyx mori that was suffering from the common infection septicemia. The colony was round, slightly convex, smooth, moist, translucent, regular-edged and milky white on nutrient agar medium. The SY-1 was identified as a putative strain of Providencia rettgeri through its physiological and biochemical properties, and phylogenetic analyses performed using the 16S rRNA gene sequence. The SY-1 was identified as a putative strain of P. rettgeri. This is the first report demonstrating that P. rettgeri is pathogenic to B. mori. The identification of this strain adds to known kinds of pathogens that cause bacterial septicemia in the silkworm. This study aids the understanding of the prevention and control of the bacterial septicemia pathogens of B. mori.


Key words: Bombyx mori, bacterial septicemia, pathogen, Providencia.