types of uti bacteria
Bacteria are the primary organisms that cause UTIs. Most common bacteria that cause UTIs include: Escherichia coli and Staphylococcus saprophyticus. About 80-90% of urinary tract infections are caused by Escherichia coli (E. coli).
And about 5% or less of urinary tract infections are caused by other bacteria. Gram-negative microorganisms causing UTIs include Proteus, Klebsiella, Citrobacter, Enterobacter, and Pseudomonas spp. Gram-positive microorganisms such as Enterococcus faecalis can also infect the urinary tract.