Final answer:
Escherichia coli and Staphylococcus saprophyticus are frequently associated with bladder infections.
Step-by-step explanation:
Escherichia coli and Staphylococcus saprophyticus are frequently associated with bladder infections.
Bladder infections, also known as cystitis, can be caused by various types of bacteria. Gram-negative bacteria like E. coli, Proteus vulgaris, Pseudomonas aeruginosa, and Klebsiella pneumoniae are common causes, while Gram-positive pathogens such as Staphylococcus saprophyticus, Enterococcus faecalis, and Streptococcus agalactiae can also be associated with bladder infections.