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Department of Urology
Tianjin First Central Hospital
Infection of the Genitourinary Tract
Urinary tract infections (UTIs) caused by pathogenic bacteria
01
can involve any of the genital or urinary organs and eventually
02
can spread from one site to any
03
or all of the others.
04
Definitions 1
Urinary tract infection is an inflammatory response of the urothelium to bacterial invasion
that is usually associated with
bacteriuria and pyuria.
Most UTIs are caused by aerobic
gram-negative rods, (Escherichia coli.),
gram-positive cocci (enterococci) and
to a lesser extent
by anaerobic bacteria.
Definitions 2
01
02
Definitions 3
Bacteriuria is the presence of bacteria in the urine, which is normally free of bacteria, and implies that these bacteria are from the urinary tract and are not contaminants from the skin, vagina, or prepuce.
cells in the urine
Pyuria is the presence of white blood
bacterial colonization rather than infection.
Bacteriuria without pyuria indicates
evaluation for tuberculosis, stone,
or cancer.
Pyuria without bacteriuria warrants
Definitions 4
Classification
第一章
According to their nature history
1
First infections/Isolated Infection
2
Recurrent infections
3
Bacterial persistence
4
Reinfections
5
Reinfection is recurrent infection with different bacteria from outside the urinary tract. Each infection is a new event; the urine must show no growth
after the preceding infection.
1
2
Bacterial persistence refers to a recurrent urinary tract infection caused by the same bacteria from a focus within the urinary tract, such as an infection stone or the prostate.