G M Mussalli1, S R Brunnert, E Hirsch. 1. Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.
Abstract
OBJECTIVE: Our purpose was to develop a mouse model of renal abscess to study the effect of extrauterine infection on preterm delivery. METHODS: Escherichia coli or sterile medium was injected into the left kidney of 70 pregnant mice that had completed approximately 75% of gestation. Preterm delivery rates were recorded for various inocula. Kidney specimens were obtained and examined grossly and histologically for abscess formation. RESULTS: Thirty-one of 51 animals (60.8%) infected with 1 x 10(5)-9 x 10(6) bacteria and none of 19 uninfected animals delivered prematurely (P < .001). Renal abscess was induced in 100% of mice receiving bacterial inoculation but in none receiving sterile medium. CONCLUSION: Kidney injection provides a reliable method for inducing renal abscess in pregnant mice. Renal abscess induces preterm delivery at a stable rate across a wide range of bacterial inocula. This model of extrauterine infection may be particularly useful in investigations of infection-induced preterm delivery.
OBJECTIVE: Our purpose was to develop a mouse model of renal abscess to study the effect of extrauterine infection on preterm delivery. METHODS:Escherichia coli or sterile medium was injected into the left kidney of 70 pregnant mice that had completed approximately 75% of gestation. Preterm delivery rates were recorded for various inocula. Kidney specimens were obtained and examined grossly and histologically for abscess formation. RESULTS: Thirty-one of 51 animals (60.8%) infected with 1 x 10(5)-9 x 10(6) bacteria and none of 19 uninfected animals delivered prematurely (P < .001). Renal abscess was induced in 100% of mice receiving bacterial inoculation but in none receiving sterile medium. CONCLUSION: Kidney injection provides a reliable method for inducing renal abscess in pregnant mice. Renal abscess induces preterm delivery at a stable rate across a wide range of bacterial inocula. This model of extrauterine infection may be particularly useful in investigations of infection-induced preterm delivery.
Authors: Mark Phillippe; Allaire K Diamond; Leigh M Sweet; Karen H Oppenheimer; Diana F Bradley Journal: Reprod Sci Date: 2011-06-21 Impact factor: 3.060
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