Nephrotic syndrome associated with hepatointestinal schistosomiasis

Area of Science:

• Nephrology
• Infectious Diseases
• Immunology

Background:

• Schistosomal nephropathy is traditionally associated with the hepatosplenic form of schistosomiasis.
• Recent studies investigated hepatointestinal schistosomiasis in patients presenting with nephrotic syndrome.

Purpose of the Study:

• To evaluate the potential etiological role of schistosomiasis in the development of nephropathy.
• To compare the histological and immunofluorescence findings in patients with schistosomal nephropathy and idiopathic nephrotic syndrome.

Main Methods:

• Comparative study of 24 patients with hepatointestinal schistosomiasis and nephrotic syndrome against 37 patients with idiopathic nephrotic syndrome.
• Histological examination of renal biopsies.
• Immunofluorescence studies for immunoglobulin and complement deposition.

Main Results:

• A significant prevalence of proliferative mesangial glomerulonephritis was observed in the schistosomiasis group (33.3%) compared to the control group (membranous glomerulonephritis, 32.4%).
• Immunofluorescence showed significantly higher positivity for IgM in the schistosomiasis group (94.4%) versus the control group (55.0%).
• Mesangial proliferative and membranoproliferative glomerulonephritis showed granular deposits of IgM and C3 in the glomeruli in the schistosomiasis-associated nephropathy.

Conclusions:

• Mesangial proliferative and membranoproliferative glomerulonephritis are characteristic renal lesions in schistosomiasis-associated nephropathy.
• Glomerular granular deposits of IgM and C3 are key indicators in diagnosing schistosomal nephropathy.