4.3 Article

Candidate Animal Disease Model of Elizabethkingia Spp. Infection in Humans, Based on the Systematic Pathology and Oxidative Damage Caused by E. miricola in Pelophylax nigromaculatus

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HINDAWI LTD
DOI: 10.1155/2019/6407524

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资金

  1. double support plan of Sichuan Agricultural University [03571775]
  2. National Science Foundation [31401488]
  3. Applied Basic Research from Technological Office of Sichuan Province [2015JY0206, 19YYJC2725]

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Most species of the genus Elizabethkingia are pathogenic to humans and animals, most commonly causing meningitis. However, our understanding of the pathogenic mechanisms involved is poor and there have been few pathological studies of Elizabethkingia spp. in animals. To understand the host injury induced by Elizabethkingia spp., we established a model of E. miricola infection in the black-spotted frog (Pelophylax nigromaculatus). The systematic pathology in and oxidative damage in the infection model were investigated. Our results show that recently isolated E. miricola is a bacterium that mainly parasitizes the host brain and that neurogenic organs are the predominant sites of damage. Infection mainly manifested as severe brain abscesses, meningoencephalitis, necrotic spondylitis, and necrotic retinitis. The liver, spleen, kidney, gastrointestinal tract, and lung were also affected to varying degrees, with bacterial necrotic inflammation. P. nigromaculatus also suffered enormous damage to its oxidative system during E. miricola infection, which may have further aggravated its disease state. Our results provide a preliminary reference for the study and treatment of Elizabethkingia spp.-induced neurological diseases in animals.

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