Bioluminescent tracking of colonization and clearance dynamics of plasmid-deficient Yersinia pestis strains in a mouse model of septicemic plague |
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| Institution: | 1. Guangxi Medical University, Nanning 530021, China;2. Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China;3. Laboratory Animal Research Center, Academy of Military Medical Science, Beijing 100071, China;1. College of Life and Environmental Sciences, Hangzhou Normal University, 310016 Hangzhou, Zhejiang, China;2. Date Palm Research Center, King Faisal University, P.O. Box 420, Al-hasa 31982, Saudi Arabia;3. Department of Food Science, Anqing Vocational & Technical College, 246003 Anqing, Anhui, China;1. Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Center for Airborne Pathogens Research and Imaging, Medical Research & Education Building, 8447 State Hwy 47, Bryan, TX 77807, USA;2. Agios Pharmaceuticals, 88 Sydney St., Cambridge, MA 02139, USA |
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| Abstract: | Yersinia pestis 201 contains 4 plasmids pPCP1, pMT1, pCD1 and pCRY, but little is known about the effects of these plasmids on the dissemination of Y. pestis. We developed a plasmid-based luxCDABE bioreporter in Y. pestis 201, Y. pestis 201-pCD1+, Y. pestis 201-pMT1+, Y. pestis 201-pPCP1+, Y. pestis 201-pCRY+, Y. pestis 201-p? and Yersinia pseudotuberculosis Pa36060 strains, and investigated their dissemination by bioluminescence imaging during primary septicemic plague in a mouse model. These strains mainly colonized the livers and spleens shortly after intravenous inoculation. Y. pestis 201-pMT1+ appeared to have a stronger ability to survive in the livers, spleens and blood, and to be more virulent than other plasmid-deficient strains. Y. pestis 201-pPCP1+ appeared to have a stronger ability to colonize lungs than other plasmid-deficient strains. Pa36060 has the strongest ability to colonize intestines and lungs. Y. pestis 201 has the strongest ability to survive in blood, and the strongest virulence. These results indicated that the plasmid pMT1 was an important determinant in the colonization of livers, spleens and blood, whereas the plasmid pPCP1 appeared to correlate with the colonization in lungs. The resistance to killing in mouse blood seemed to be the critical factor causing animal death. |
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| Keywords: | Plague Bacterial dissemination |
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