Experimental ampicillin glomerulonephropathy

Area of Science:

• Veterinary Medicine
• Nephrology
• Pharmacology

Background:

• Antibiotic-induced kidney damage is a concern in veterinary medicine.
• Glomerulonephritis can manifest with varying degrees of severity.
• Ampicillin is a widely used antibiotic in companion animals.

Purpose of the Study:

• To investigate the renal effects of repeated ampicillin administration in dogs.
• To characterize the pathological changes in canine kidneys following ampicillin exposure.

Main Methods:

• Eighteen healthy dogs received multiple intramuscular injections of ampicillin (7 mg/kg, thrice weekly).
• Kidney tissues were examined for pathological changes consistent with glomerulonephropathy.
• Immunohistochemistry and electron microscopy were used to detect immune deposits.

Main Results:

• Fifteen of the 18 dogs developed subclinical glomerulonephropathy.
• Mesangial hypercellularity was a common finding.
• Glomerular deposits of immunoglobulin G (IgG) were detected in 14 dogs, with 11 also showing C3 deposits.

Conclusions:

• Repeated ampicillin administration can induce subclinical glomerulonephropathy in dogs.
• Immune complex deposition, involving IgG and C3, is a key feature of this ampicillin-induced kidney injury.
• These findings highlight the potential nephrotoxic effects of ampicillin in canine patients.