Etiologic Agents Community Acquired

Escherichia coli is by far the most frequent cause of uncomplicated community-acquired UTIs. At the molecular level, the E. coli that causes UTTs is sufficiendy different from other types of E. coli so as to be designated uropathogenic E. coli (UPEC). Other bacteria frequently isolated from patients with UTTs are Klebsiella spp., other Enterobaderiaceae, Staphylococcus saprophytics, and en-terococd In more complicated UTTs, particularly in recurrent infections, the relative frequency of infection caused by Proteus, Pseudomonas, Klebsiella, and Entero-bacter spp. increases.

Upper urinary tract

Right Wdney

Ureters

Lower urinary tract

Right Wdney

Ureters

Normal Flora The Urinary Tract

Adrenal gland

Lett kidney

Diaphragm

Figure 57-1 Overview of the anatomy of ihe urinary tract (From Potter PH, Perry AG: Fundamentals of nursing, St Louis, 1985, Mosby.)

Adrenal gland

Lett kidney

BOX 57-1 Resident Microflora of the Urethra

Coagulase-negatlve staphylococci (excluding S. saprophytics)

Virldans and non-hemolytic streptococci

Lactobacilli

Diphtheroids (Corynebacterium spp.) Nonpathogenic (saprobic) Neisseria spp. Anaerobic cocci Propionibacterium spp. Anaerobic gram-negative bacilli Commensal Mycobacterium spp. Commensal Mycoplasma spp.

Was this article helpful?

0 0
Bacterial Vaginosis Facts

Bacterial Vaginosis Facts

This fact sheet is designed to provide you with information on Bacterial Vaginosis. Bacterial vaginosis is an abnormal vaginal condition that is characterized by vaginal discharge and results from an overgrowth of atypical bacteria in the vagina.

Get My Free Ebook


Post a comment