It would seem, what is the problem? But no, they will definitely find out whether it is possible not to wash.
In short, if all people took urine by the reference method (with a needle through the stomach), then this urine would normally be sterile. But it's too cruel to do that, so they just urinate into the container. Therefore, microbes, leukocytes and erythrocytes from outside and from the urethra enter the urine. Therefore, it would be logical to wash.
But in order not to scare away the laziest patients, it was decided not to force them to wash. Optional. You can simply exclude contact of urine with skin or mucous membranes. Those who have skin in that place need to pull the skin away, and those who have mucous membrane in that place need to move something apart.
In any case, you should try to collect the average portion of urine. They begin to urinate, the first portion is released into the toilet and only a container is substituted for the middle portion. So it is possible to wash off excess debris, bacteria, epithelial cells, leukocytes.
In fact, we are not expecting these bacteria from you. Only we are interested in those bacteria who live in the bladder. Because normally they shouldn't be there.
To catch these bladder bacteria, you need to take the first morning urine for analysis. This urine is more concentrated and contains more bacteria that have accumulated overnight. All other daily urine portions will already be diluted, runny, and uninteresting. Well, the unfortunate bacteria will be washed off by repeated urination and may go unnoticed.
On the other hand, if you try and get the long-awaited microbes, then you cannot allow them to multiply. That is, the microbes have something to eat in the urine, and if you leave the jar with the collected urine warm, then by the time of the analysis there may be more microbes. So you can be wrong.
Therefore, the container with urine can be refrigerated and stored there at 4 degrees. At this temperature microbes will multiply very reluctantly.
It is best to transfer the jar to the laboratory within the first hour. You can store urine in the refrigerator for 4 hours. If it is very difficult, then you can store it for a day, but there will already be mistakes. Firstly, microbes will multiply. Secondly, leukocytes die from the cold and it may seem that there are fewer of them than they really are.
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