Can STDs Affect the Kidneys? HIV, Syphilis, and Hepatitis

STDs can damage the kidneys, but the mechanism is indirect rather than through direct renal infection. The infections that pose the greatest renal risk are untreated syphilis, HIV (through HIV-associated nephropathy), and chronic hepatitis B and C through immune complex-mediated glomerulonephritis. Understanding which infections carry this risk, and why, helps clarify when kidney involvement should be considered.

Quick answer: HIV is the STD most commonly associated with kidney disease, through HIV-associated nephropathy (HIVAN), which predominantly affects Black patients with poorly controlled HIV. Syphilis can cause immune complex glomerulonephritis in secondary and tertiary stages. Hepatitis B and C can cause membranous nephropathy and MPGN through immune complex deposition. Chlamydia, gonorrhea, and herpes do not directly damage kidneys in immunocompetent people. Testing available in Los Angeles, Houston, New York City, Miami, and Chicago.

HIV and the Kidneys

HIV-associated nephropathy (HIVAN) is the most significant STD-related kidney complication. It occurs primarily in people with uncontrolled HIV and high viral load, predominantly affecting Black patients due to genetic susceptibility variants in the APOL1 gene. HIVAN causes collapsing focal segmental glomerulosclerosis — a pattern of kidney injury that can rapidly progress to end-stage renal disease without treatment. It presents with proteinuria (protein in the urine) and progressive decline in kidney function.

Effective antiretroviral therapy prevents and can partially reverse HIVAN. HIV is also associated with other kidney complications: immune complex-mediated glomerulonephritis, tenofovir-related tubular injury from older antiretroviral regimens, and increased risk of chronic kidney disease at population level.

Syphilis and the Kidneys

Secondary syphilis causes a systemic inflammatory response with deposition of immune complexes in multiple organs, including the kidneys. Syphilitic glomerulonephritis presents as membranous nephropathy or proliferative glomerulonephritis, characterised by proteinuria, haematuria (blood in urine), and oedema. It is rare but well-documented, and typically resolves with penicillin treatment. Any patient with secondary syphilis who has significant proteinuria or oedema should have renal function assessed.

Hepatitis B and Hepatitis C

Hepatitis B is associated with membranous nephropathy through deposition of hepatitis B antigen-antibody complexes in glomerular basement membranes. This typically occurs in people with chronic hepatitis B and causes nephrotic-range proteinuria. Treatment of hepatitis B with tenofovir or entecavir usually leads to remission of the nephropathy.

Hepatitis C is the most common cause of cryoglobulinaemia — a condition where cold-precipitable immune complexes damage small blood vessels including those in the kidneys, causing membranoproliferative glomerulonephritis (MPGN). Chronic hepatitis C is also an independent risk factor for chronic kidney disease. Direct-acting antiviral treatment for hepatitis C typically resolves cryoglobulinaemia and associated kidney disease.

When to Seek Evaluation

• Swelling of the legs or feet (oedema) in someone with known HIV or hepatitis: possible nephrotic syndrome from kidney involvement — same-week evaluation with urine protein testing and renal function blood tests.

• Foamy or dark urine in someone with any STD: possible proteinuria or haematuria — GP evaluation within a few days.

• Known HIV with declining kidney function: nephrology referral, and ensure current ART regimen minimises nephrotoxic risk.

Frequently Asked Questions

Can chlamydia or gonorrhea damage the kidneys?

Not directly in immunocompetent people. These infections cause local mucosal inflammation. There are rare case reports of reactive arthritis triggered by chlamydia causing glomerulonephritis, but this is exceptional. Kidney damage from chlamydia or gonorrhea is not a routine clinical concern.

Does HIV always cause kidney disease?

No. HIVAN is the most severe HIV-related kidney complication but affects primarily Black patients with uncontrolled viral load and specific APOL1 genetic risk variants. In people with well-controlled HIV on ART, HIVAN is uncommon. HIV does increase the general risk of chronic kidney disease, however, and kidney function should be monitored as part of routine HIV care.

Related: Understanding HIV · Hepatitis B · Syphilis · Get tested today →