Kidney abscess

Steven C. Campbell, M.D., Ph.D.

A kidney abscess is in intrarenal infection. Kidney abscesses are rare.

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Steven C. Campbell, M.D., Ph.D.

Most perirenal abscesses are caused by urinary tract infections that start in the bladder, spread to the kidney, and then spread to the area around the kidney. Other causes of perirenal abscess include surgery in the urinary tract or reproductive system and bloodstream infection.

The primary pathogens involved in a kidney abscess include the following:

• Enterobacter species
• Escherichia coli
• Klebsiella species
• Proteus mirabilis
• Pseudomonas species
• Streptococcus faecalis
• Staphylococcus aureus

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Steven C. Campbell, M.D., Ph.D.

The biggest risk factor for perirenal abscess is kidney stones that block the flow of urine and provide a place for an infection to grow. Bacteria tend to stick to the stones and antibiotics can’t kill the bacteria there.

Stones are found in 20 – 60% of patients with perirenal abscess. Other risk factors for perirenal abscess include:

• Diabetes
• Having an abnormal urinary tract
• Trauma

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Steven C. Campbell, M.D., Ph.D.

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In general, quick diagnosis and treatment of perirenal abscess should lead to a good outcome. Kidney stones must be treated to avoid further infections. In rare cases, the infection can spread beyond the kidney area and into the bloodstream, which can be deadly.

If one has kidney stones, the infection may not go away.

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