Hey special K, I am sure your vet will give a full run down tomorrow, but I will give you the information I know so you can think on some things overnight and ask more informed questions tomorrow
I am a medical technologist, trained to urinalysis on people. Vets use the same methods and the same dipsticks as human doctors. As a disclaimer it is against the law for Medical Technologists to give a diagnosis. I am assuming it is the same for Vet Techs as well. Although we are trained to run these tests and know what they indicate we cannot give this information out as a diagnosis. So the information below is not a diagnosis for your kitty, just some information on what these tests look for and things they indicate could be wrong. Make sure to discuss any questions with your Vet tomorrow. ( ok disclaimer over
) I screen my own cats urine at home, but whenever anything is abnormal I always take them in for the vet to confirm or deny the results.
The WBC or Leukocyte test pad can often read a false positive in cats. It is best to look under the microscope and confirm the presence of WBC's when this is positive. It appears your vet has had this done. The Leuk to Glucose parameters are from a dipstick. The WBC, RBS, Epithelial cells, Bacteria, Casts and Crystals are from the microscopic examination.
RBC's : The dipstick will pick up very small amounts of blood. It is possible for the urine to look a normal yellow color and still be positive for red blood cells. The test strips also pick up RBCs that have hemolyzied ( ruptured) so they would not be visable when looking under the microscope.
There are two possiblities for the "not marked". If they left these blank and you are saying "nothing marked" it is possible that they didn't do a microscopic exam. I don't think this is the case because the indicate there are no casts or crystal present which must be looked for under the microscope.
More likely the term "not marked" is indicating these parameters are "not markedly elevated" or equivalent to a 1+ positive This terminology means a great deal to the tech, but very little to the general .public. It is way of general quantification of the amount of cells seen under the microscope, with out actually counting them. To the owner it should mean this is a positive test and not a normal result
Protein is another difficult parameter for cats. Protein can be elevated with kidney problems or with UTI's. Cats can also have small amounts of protein, trace to 1+, in their urine normally. So this test needs to be evaluated with all the other parameter and symptoms before making any kind of diagnosis.
pH for cats is usually between 6.0 and 6.5, slightly acidic. There are several theories on urine pH. High pH and very low pH can induce crystals to form. Also, bacteria are more likely to grow in an environment that has a neutral (7.0) or higher pH. This is the reason for the methigel, which is methionine, an amino acid that will acidfy the urine.
Specific Gravity determines how concentrated the urine is and is used to help determine how well the kidney is functioning. The normal range of SG for a cat is different than humans and a refractomer should be used when kidney problems are suspected. It is an ok screening test, but really has nothing to do for UTI's, just happend to be on the test strip so gets reported.
X-rays are very good indicators if there are stone inside the bladder, which can be a cause of re-occuring infections, which it appears your kitty has.
It is also possible that in treating his previous infection it did not completely clear and now has gotten worse again. I have had cats that needed to be on different antibiotics for 6 weeks in order to completely clear an infections.
Your vet may also want to do a cystocentisis to send the urine off for a culture and sensitivity. This is where they remove urine from the bladder using a needle. This ensures that any bacteria in the urine is from the bladder which should be sterile. This is then cultured on to special plate and the any bacteria that grows is identified. The pure cultures of bacteria are then exposed to different antibiotics to determine which ones sucessfully inhibit the bacteria from growing. Not all antibiotic work agains all bacteria.
Ok that is UA in a nutshell. Please make sure to talk all of this over with your vet tomorrow. It sounds as if he is very good and just busy at the moment and plans on giving you the full run down tomorrow at your appointment.