Is there a connection between high sugar levels and urinary infection?

December 20, 2010 6:57am CST
Of late my friend had to use public toilets often due to travel or other reasons and had developed urinary infection. Even after taking antibiotic for three days, it has not subsided completely. Her husband says may be sugar level gone up in blood or urine and that is the reason for this urinary infection. Is it true? Can you clarify my doubt please? Thanks in advance.