Frequency of intraendothelial 'virus-like' particles: an electron microscopy study of 376 human renal biopsies

Intraendothelial ;virus-like' particles were found in all cases requiring a renal biopsy: in 89% of patients with systemic lupus erythematosus (SLE), in 73% of those receiving renal transplants more than one year before, and in 24.5% of all other renal biopsies.