Experimental study on the fatal infection with Vibrio vulnificus / 中华检验医学杂志

ABSTRACT

Objective To identify the histopathological characteristics of multiple organ dysfunction syndrome (MODS) with V. vulnificus in mice. Methods Sixteen healthy KM mice (6～8 week old ) divided randomly into two groups, study group ( n =12) and control group ( n =4) The animal model of MODS was established by received either an intraperitioneal, intramuscular subcuneous inoculum of 4.34?10 6 cfu/0.2 ml of V.vulnificus or intraperitioneal injection of a sterile physiological salt solution (control group). Pathological changes of the man organs were individually obsenved in under election microscope (EM). Results Mortality rates exced 100%, 12/12) in study group after inoculums of mice within 4～8 h, while in 0% (0/0) in the control . The detection rate of V. vulnificus were in 100%(12/12) from blood, hearts, lungs, livers, intramuscularly, subcutaneous in the study group, while in 0% (0/4) after sterile saline intraperitioneal injection. The man histopathological changes weredegeneration and necrosis of the parenchyma cells in the different organs;interstitial swelling, mitochondriondrial injure of multiple organs.These changes were especially obvious in the lungs and myocardeum. Conclusions Above pathological changes suggested that results of MODS caused by V. vulnificus septicemia,the multiple organs failure as an important feature of the fatality of V. vulnificus infections,and my be helpful for researchers investigating of V.vulnificus.