Pavel welcome to the site! SCM is right the only way to get a clear urine sample is via cystocentisis. Then there is no chance of any other bacteria getting into it and skewing the results. If you ask for the culture & sensitivity they will grow the bacteria present and find you the absolute best course of antibiotic to get rid of the problem. My girl had Cocci last year and ecoli.
I would also consider asking your vet to give you a break on the price considering you have done so many urine tests.
My vet also told me after completing the C&S Test if you retest it within 10 or 14 days I forget then the retesting price was on $50.00 for us??
Tabitha April 10, 1995 - August 23, 2013
Bomber April 10, 1995 - July 12, 2010
Winston Nov 15, 1999 - September 15, 2011
Sophie Aug 30, 2011
"UNTIL ONE HAS LOVED AN ANIMAL, PART OF THEIR SOUL REMAINS UNAWAKENED"
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion.