The most common pathogen causing pyelonephritis is

Feb 26, 2023 Source: Cainiu Health

Dr. Zhao Xinju

Introduction

The most common pathogenic bacteria causing pyelonephritis are Gram-negative bacilli, Escherichia coli, Staphylococcus aureus, and other microorganisms. Gram-negative bacilli are commonly found as resident bacteria in the urinary system; normally retained locally in the urethra, they are readily flushed out by urine and thus unlikely to cause infection. However, when resistance is decreased, accompanied by reduced urine output and urine stasis in the local area, Gram-negative bacteria can easily proliferate.

　　The most common pathogenic bacteria causing pyelonephritis are Gram-negative bacilli, Escherichia coli, Staphylococcus aureus, and other microorganisms.

　　1. Gram-negative bacilli

　　Gram-negative bacilli are common resident bacteria in the urinary system. Normally, they remain localized in the urethra and are promptly flushed out by urine, making infection unlikely. However, when immunity decreases, accompanied by reduced urine output and urine stasis in the local area, these bacteria can easily proliferate and lead to pyelonephritis. Medications such as levofloxacin capsules or amoxicillin capsules may be taken under medical guidance.

　　2. Escherichia coli

　　Approximately 70%–80% of pyelonephritis cases are caused by Escherichia coli infection, often presenting with symptoms such as high fever at night and flank pain. Treatment may include cefuroxime tablets or cefotiam tablets, as directed by a physician.

　　3. Staphylococcus aureus

　　Pyelonephritis caused by Staphylococcus aureus typically occurs in the context of systemic infection, where bacteria from an infection site elsewhere in the body spread to the kidneys via the bloodstream. Symptoms may include flank pain, fever, and nausea. Vancomycin tablets may be prescribed under medical supervision for treatment.

　　In addition, pyelonephritis may also be caused by Klebsiella pneumoniae or Proteus species. Maintaining healthy intestinal function is important in daily life. Women should maintain good personal hygiene, and both the gynecological and gastrointestinal systems should remain in normal condition to reduce the risk of pyelonephritis episodes.

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What bacteria cause pyelonephritis?

Pyelonephritis may be caused by Escherichia coli, alpha-hemolytic streptococcus, Klebsiella, Citrobacter, Streptococcus pneumoniae, etc. In addition, Staphylococcus aureus and Pseudomonas aeruginosa can also potentially cause pyelonephritis. If pyelonephritis occurs, patients may take medications such as cefixime capsules or minocycline hydrochloride capsules under the guidance of a physician.

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Can pyelonephritis heal on its own?

Pyelonephritis generally does not resolve spontaneously and requires timely treatment. Pyelonephritis is classified into acute and chronic phases, with main symptoms including frequent urination, urgency, fever with chills, and headache. Chronic pyelonephritis may sometimes present only as asymptomatic bacteriuria; over half of the patients have a history of acute pyelonephritis and may experience mild fever and intermittent urinary frequency to varying degrees.

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Can pyelonephritis be completely cured?

Pyelonephritis is divided into acute pyelonephritis and chronic pyelonephritis. Generally, most cases of acute pyelonephritis can be cured, whereas the cure rate for chronic pyelonephritis is lower. Acute pyelonephritis is an upper urinary tract infection with a higher incidence in females, and the majority of causative pathogens are Escherichia coli. It is usually caused by ascending infection via the urethra.

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The key to effective treatment of uncomplicated acute pyelonephritis is completing several days of therapy.

The key to effective treatment of uncomplicated acute pyelonephritis is completing a 14-day course of therapy. Uncomplicated acute pyelonephritis is an acute inflammatory condition caused by bacterial invasion of the renal pelvis, affecting one or both sides, and is a type of urinary tract infection. This condition is more commonly seen in women, as anatomical and physiological factors make women significantly more susceptible to urinary tract infections than men.