Infection is defined as the invasion and multiplication of harmful microorganisms, such as bacteria, viruses, or fungi, within the body. In the context of Chronic Kidney Disease (CKD), the most critical and frequent concern is bacterial Urinary Tract Infection (UTI).
Healthy feline urine is highly concentrated and acidic, properties that naturally kill bacteria. However, CKD kidneys lose the ability to concentrate urine. This results in a dilute, watery environment that is less hostile to bacteria, allowing them to thrive. Crucially, CKD cats often develop "silent" infections. Because the urine is so dilute, it does not sting or irritate the bladder wall, so the cat may not show classic signs like straining or crying in the litter box. If left untreated, these bacteria can ascend from the bladder up the ureters and into the kidneys themselves. This deep kidney infection, known as Pyelonephritis, can cause a sudden and devastating decline in kidney function. Consequently, routine urine cultures (growing bacteria in a lab) are recommended for all CKD patients, even if they appear symptom-free, to catch these hidden threats before they destroy the remaining nephrons.
Disclaimer: This content is for educational purposes only and does not constitute veterinary medical advice. Always consult with your primary care veterinarian or a veterinary internal medicine specialist regarding your cat’s specific condition.