Masters Project Topics in MicroBiology
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Project Body
Chapter One
Introduction
TOPIC:
ANTIBACTERIAL EFFECTS OF Chrysophyllum albidum EXTRACTS ON BACTERIAL ISOLATES FROM URINARY CATHETERS
Department: MicroBiology (M.SC)
Format: MS Word
Chapters: 1 - 5, References
Page Numbers: 140
Price: 5000 NGN
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Project Body
Chapter One
Introduction
Indwelling urinary catheters are standard medical devices utilized in both
hospitals and nursing home settings to relieve urinary retention and
urinary incontinence (CDCP, 1992). The most common urinary catheter
in use is the Foley indwelling urethral catheter, a closed sterile system
that comprise of a tube inserted through the urethra and held in place by
an inflatable balloon to allow urinary drainage of the bladder. Due to the
frequent, hospital application motive and catheter placement skill on the
part of medical personnel, the use of indwelling catheters during
hospitalisation, 21-50% of patients are placed at risk for complications
associated with the use of these devices (Liedberg et al, 1990).
In patients with indwelling urinary catheter, microorganisms may be
introduced into the bladder; (i) at the time the catheter is inserted, (ii) due
to the ascent of microorganisms through the catheter lumen from a
contaminated drainage system, and (iii) migration of microorganisms
present in the urethra around the catheter (Kass, et al 1957).
The definition of Catheter-Associated Urinary Tract Infection (CAUTI)
varies among published studies and the terms “bacteriuria” and “urinary
tract infection” (UTI) are frequently used indistinctly (Kunin, 1997).
Bacteriuria or funguria levels >103 colony- forming units (CFU) have
been shown to be highly predictive of CAUTI, given that these levels
increase to 105 CFU within 24 to 48 hours (Stark, et al 1984). Other
specialists consider CAUTI to be present when there is predominant
pathogen growth equal to or greater than 102 CFU, especially when
associated with piuria (Stamm, 1998). Signs and symptoms associated
with CAUTI such as fever, disuria, urgency, flank pain and leukocytosis
have also been shown to have a low positive predictive value for CAUTI
diagnosis since 90 percent of them are asymptomatic. This is most likely
due to the fact that a urinary tract catheter continually eases bladder
compression, thus avoiding urgency and pollakiuria associated with inflamed bladder distension. A catheter in the urethra also prevents
continuous urethral exposure to large numbers of organisms in the
infected urine, averting urethritis, and consequently, urgency and disuria
(Tambyah, et al 2000). Millions of urinary tract catheterizations are
carried out worldwide for purposes of control, repair, diagnosis and
treatment. The risk of infection per procedure is from 1 to 2 percent. This
risk increases to 3 to 7 percent per catheterization day in such a way that
nearly all patients will present with bacteriuria after 30days of urethral
catheterization (Nagy, 2004).
Masters Project Topics in MicroBiology
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