Bacteriuria

Introduction Normally, the urine is sterile, but the lower third of the urethra and the lower urethra are bacteriological. Therefore, urine discharged from the human body can contaminate the upper part of the bacteria. However, the amount of bacteria in the middle of the cleansing should not exceed 105/ml. If the bacterial count is more than or equal to 105/ml and is the same strain, and there is no urinary tract infection (frequent urination, urgency or lower abdominal discomfort), it can be diagnosed as true bacteriuria. Asymptomatic bacteriuria.

Cause

Gut urine during pregnancy is one of the most common diseases in women during pregnancy, and its incidence is 4% to 10%. The most common pathogen of bacteriuria during pregnancy is Escherichia coli, which accounts for more than 80%, followed by Proteus, Klebsiella, Aerobacter, Enterococcus, Streptococcus faecalis, and Staphylococcus aureus. These bacteria are already present in the urethra before pregnancy. In early pregnancy, due to increased progesterone secretion, the tension of the renal pelvis, renal pelvis and ureter is reduced. In the late pregnancy, the enlarged uterus compresses the ureter (especially the right ureter), which can make the urine excretion and retention, which are beneficial to Breeding of bacteria. In addition, the increase in nutrients in the urine of pregnant women is also conducive to the growth of bacteria. Bladder compression, injury during childbirth, dysuria after cesarean section and the use of catheters also increase the chance of bacterial ascending infection. Therefore, the risk of bacteriuria is greatly increased during pregnancy. It has been found that the older the pregnant woman, the more the number of pregnancies, the greater the risk of bacteriuria.

an examination

Related inspection

Urine routine urine pathogen examination

Asymptomatic bacteriuria can evolve from symptomatic urinary sensation, that is, symptomatic urinary sensation disappears naturally or after treatment, leaving only bacterial urine and can last for many years. Some bacteria and urine can have no history of acute urinary sensation. In addition, the urinary sensation that occurs after the use of urinary tract devices and on the basis of chronic kidney disease often has no obvious symptoms. Diagnosis based on the amount of bacteria in the urine.

Differential diagnosis

1, asymptomatic bacteriuria: also known as occult bacteriuria, refers to patients with true bacterial urine, and no clinical symptoms of urinary tract infection. Asymptomatic bacteriuria is common in women. Clinically, there are often no signs and symptoms of urinary tract infections. Urine routine examinations are not obvious, only bacterial urine. The disease can evolve from symptomatic urinary tract infections. Most of the pathogenic bacteria are Escherichia coli. The bacteria can come from the kidneys or the bladder, so cases with persistent bacterial urine need to be further located and examined for anatomical abnormalities in the urinary system, giving appropriate treatment.

2, urethral syndrome: also known as aseptic urinary frequency - urinary discomfort syndrome. Patients with intermittent or persistent urinary frequency, urgency, urinary pain symptoms, often with frequent urination as the main performance. Mostly women, but no urine in multiple urine cultures. The cause is not clear, but some people believe that it is related to nylon pants, gynecological inflammation, excessive anxiety, abnormal urethral dynamics and other factors.

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