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Pathology - Urinary tract infection
Pathogens: Escherichia (E.) coli is the primary organism. • Staphylococcus saprophyticus and Proteus mirabilis represent other etiological agents.
Epidemiology: Highly prevalent. Approximately 60% of women will get a urinary tract infection at some stage in their lives.
Aetiology • The upward migration of indigenous gut bacteria into the urethra. • The shorter urethra in females, along with its closeness to the anus, is believed to be the primary factor contributing to their increased susceptibility
. Risk determinants • Female sex, coitus, gestation, diabetes mellitus, catheterization, urinary tract obstruction or anomaly.
Pathogenesis Pathogenic strains of E. coli possess pili that facilitate adhesion to galactose-containing receptors on the urothelial cell surface. Other significant virulence factors encompass haemolysin, facilitating tissue penetration, and the K antigen, which confers protection against neutrophil phagocytosis.
Presentation • Cystitis results in increased frequency, urgency, dysuria, hematuria, and suprapubic discomfort. • An ascending infection affecting the kidneys (acute pyelonephritis) results in a more severe condition characterized by fever, chills, vomiting, and flank discomfort. Acute bewilderment may manifest in the elderly
Diagnosis • A urinalysis indicating the presence of leukocytes or nitrites serves as an effective rapid screening test. The gold standard is the microbiological culture of a properly obtained midstream urine specimen. A pure growth above 10^5 organisms/mL of urine is deemed diagnostic.
Pathogens: Escherichia (E.) coli is the primary organism. • Staphylococcus saprophyticus and Proteus mirabilis represent other etiological agents.
Epidemiology: Highly prevalent. Approximately 60% of women will get a urinary tract infection at some stage in their lives.
Aetiology • The upward migration of indigenous gut bacteria into the urethra. • The shorter urethra in females, along with its closeness to the anus, is believed to be the primary factor contributing to their increased susceptibility
. Risk determinants • Female sex, coitus, gestation, diabetes mellitus, catheterization, urinary tract obstruction or anomaly.
Pathogenesis Pathogenic strains of E. coli possess pili that facilitate adhesion to galactose-containing receptors on the urothelial cell surface. Other significant virulence factors encompass haemolysin, facilitating tissue penetration, and the K antigen, which confers protection against neutrophil phagocytosis.
Presentation • Cystitis results in increased frequency, urgency, dysuria, hematuria, and suprapubic discomfort. • An ascending infection affecting the kidneys (acute pyelonephritis) results in a more severe condition characterized by fever, chills, vomiting, and flank discomfort. Acute bewilderment may manifest in the elderly
Diagnosis • A urinalysis indicating the presence of leukocytes or nitrites serves as an effective rapid screening test. The gold standard is the microbiological culture of a properly obtained midstream urine specimen. A pure growth above 10^5 organisms/mL of urine is deemed diagnostic.
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