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Causes of Kidney Infection

Kidney infections result from bacterial migration from the bladder or urinary tract, often linked to untreated UTIs. Risk factors include poor hygiene, kidney stones, and a weak immune system. Early diagnosis is crucial for effective treatment and preventing severe health complications.

  • 08 Apr 2025
  • 3 min read
  • 14 views

The most common kidney infection causes are bacteria entering the urinary tract through the urethra and multiplying as they travel to your kidneys. This condition is also known as acute pyelonephritis, a type of urinary tract infection (UTI) occurring as a complication of an ascending UTI that spreads from the bladder to the kidneys. 

What are the Causes of  Kidney Infection?

Gram-negative bacterial infection in the kidneys is one of the main reasons for kidney infection. The most common gram-negative bacterium that causes kidney infection is Escherichia coli (E. Coli). 

Bacterial infection in the kidneys can occur in two ways: hematogenous spread (through the bloodstream), which is extremely rare, and ascending infection through lower UTI. The infecting bacteria often originate from the patient's faecal flora. The common bacteria that cause kidney infection are: 

  • Escherichia coli: E. Coli is the reason behind most kidney infections; the bacterium can stick and colonise the urinary tract and kidneys.  
  • Klebsiella: It is known to cause about 2-17% of complicated kidney infections.
  • Proteus: This is another common bacterium that causes lower UTI and kidney infection.
  • Enterobacter: It is another gram-negative bacterium known to cause UTI and kidney infection. 

Conclusion

Kidney infection is an extended UTI, but the symptoms are more severe and need urgent medical supervision. The causes of kidney infection in women are more common and can occur as complicated cases in pregnant women. However, medication that includes antibiotics, analgesics, and antipyretics can easily manage the condition. Further, securing a comprehensive health insurance policy can ease the financial burden encountered during the treatment process.   



Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis, or treatment. Please consult your general physician or another certified medical professional for any questions regarding a medical condition. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.

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