The ability of heavily and lightly piliated Proteus mirabilis to infect the renal parenchyma was compared in a model of hematogenous pyelonephritis. Cortical abscesses occurred in 13 of 24 rats injected with lightly piliated P. mirabilis but in none of 24 rats challenged with heavily piliated
Proteus mirabilis, a significant cause of bacteriuria and acute pyelonephritis in humans, produces urease. This high-molecular-weight, multimeric, cytoplasmic enzyme hydrolyzes urea to ammonia and carbon dioxide. To assess the role of urease in colonization, urolithiasis, and acute pyelonephritis in
Intraperitoneal immunization with formalin-killed bacteria as well as previous hematogenous infection with Proteus O3H1 showed a protective effect against hematogenous pyelonephritis in rats when the homologous strain was used. Transfer of hyperimmune antisera protected against hematogenously
A BALB/c mouse model of nonobstructive, ascending Proteus mirabilispyelonephritis was characterized bacteriologically, histologically, and serologically from 3 to 28 days. Intravesicular administration of 2 X 10(8) P. mirabilis K7 resulted in the septic death of 9 (16%) of 57 mice by day 15. Among
In animals developing experimentally induced unilateral pyelonephritis, both the infected kidney (IK) and the contralateral noninfected kidney (NIK) showed an immediate increase in renal lysozyme activity of about 5 days' duration after the unilateral injection of viable Proteus mirabilis into the
Pyelonephritis was produced in 75 white rats by applying a 24-hour ligature on the ureter and by intravenous injection of a suspension of 5X10(9) cells of a stable Proteus mirabilis L-form. Pyelonephritis was proved microscopically in 44% of the animals. The revertants of the introduced L-form play
A capnophilic Gram-negative rod-shaped bacterium was recovered from the urine of an octogenarian male patient with acute pyelonephritis. The isolate was found to produce CTX-M-2-type extended-spectrum β-lactamase. Interestingly, the isolate failed to grow on modified Drigalski (BTB) and MacConkey
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