Pyelonephritis in Dogs: Kidney Infection
Pyelonephritis is a bacterial infection of the kidneys that can cause serious damage if not treated promptly.
Pyelonephritis is a bacterial infection that affects the kidneys. Unlike lower urinary tract infections (UTIs) which affect the bladder, pyelonephritis is more serious and can cause permanent kidney damage. It usually occurs when bacteria from the bladder travel upward to the kidneys.
- Pyelonephritis is an infection of the kidneys, not just the bladder
- It often results from an untreated or recurring bladder infection
- Fever, back pain, and increased thirst are common signs
- It requires aggressive antibiotic therapy, often for 4-6 weeks
- Early treatment prevents permanent kidney scarring
- Senior female dogs are most at risk
How it Spreads
Bacteria (usually E. coli) ascend from the urethra into the bladder. If not cleared, they can travel up the ureters to infect the kidneys. Conditions that slow urine flow, like bladder stones or anatomical defects, increase the risk of ascending infections.
Recognizing the Signs
Unlike a simple bladder infection where the pet acts normal otherwise, dogs with pyelonephritis are often systemically ill. Signs include: high fever, lethargy, loss of appetite, vomiting, increased thirst, and pain when the lower back (kidney area) is touched.
Diagnosis and Treatment
Diagnosis involves blood work (kidney values are often elevated), urinalysis, urine culture, and sometimes ultrasound to check for structural changes in the kidneys. Treatment requires long-term antibiotics (usually 4-6 weeks) chosen based on urine culture results. Pain relief and anti-nausea medication are also provided.
Prevention
Treating bladder infections early and completely is the best prevention. Ensure your dog always has access to fresh water to flush bacteria. If your dog gets recurrent UTIs, investigate for underlying causes like stones, diabetes, or anatomical issues.
- Fever combined with urinary signs
- Vomiting or lethargy with urinary problems
- Pain when you touch your dog's back
- Recurrent bladder infections
- Blood in the urine that isn't improving
RVC
RVC provides advanced diagnostics for kidney infections including ultrasound and culture-guided antibiotic therapy. We manage complex urinary cases with a focus on preserving kidney function. Call +853 6677 6611.
+853 6677 6611