Publications by authors named "Manuel E Cevallos"
Purpose: Bacterial adherence to the urinary catheter is an early step in biofilm formation and the pathogenesis of catheter associated urinary tract infection. We studied in vitro the effect of silver or nitrofurazone impregnation of urinary catheters on uropathogen ability to adhere to urinary catheters.
Materials And Methods: We studied commercially available nitrofurazone-silicone, silicone only, silver-silicone-hydrogel, silicone-hydrogel, silver-latex-hydrogel and latex-hydrogel catheters.
Background: Evidence-based guidelines state that asymptomatic bacteriuria is not a clinically significant condition in men and nonpregnant women and that treatment is unlikely to confer clinical benefit. We hypothesized that, among patients with indwelling catheters or condom collection systems, many who receive a diagnosis of and are treated for catheter-associated urinary tract infection (CAUTI) actually have asymptomatic bacteriuria and, therefore, that antibiotic therapy is inappropriate.
Methods: We reviewed all urine culture results at a veterans affairs medical center during a 3-month period.
Background: In vitro, urinary catheter colonization by avirulent Escherichia coli 83972 impedes subsequent catheter colonization by a variety of uropathogenic organisms. However, E. coli 83972 shows a low efficacy of adherence to silicone urinary catheter material, possibly because the fim operon encoding adhesive type 1 fimbriae is incomplete.
View Article and Find Full Text PDFObjective: To determine whether the prevalence of gram-negative catheter-related bloodstream infection (CRBSI) is higher in patients with spinal cord injury (SCI) than in patients without SCI.
Design: Retrospective chart review from August 1998 to August 2006.
Setting: A Veterans Affairs medical center, which serves as a tertiary care medical center to over 500 veterans with SCI and is the primary source of health care for veterans in southeast Texas.