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Rheumatology 2001; 40: 152-157
© 2001 British Society for Rheumatology

Human parvovirus B19 infection in patients with systemic lupus erythematosus

T.-C. Hsu1 and G. J. Tsay

Department of Medicine and Institutes of Immunology and
1 Medicine, Chung Shan Medical and Dental College, Taichung, Taiwan

Objective. The clinical significance of the presence of B19 DNA in patients with SLE was studied.

Methods. Sera from 72 patients with systemic lupus erythematosus (SLE), 23 patients with rheumatoid arthritis (RA), 18 patients with Sjögren's syndrome (SS), eight patients with Raynaud's phenomenon (RP), five patients with primary biliary cirrhosis (PBC), five patients with polymyositis (PM), four patients with erythema infectiosum (EI) and 22 normal controls were examined for parvovirus B19 (B19) infection by serological assays, nested PCR and Southern blotting.

Results. Parvovirus B19 DNA was detected in 17 of 72 patients with SLE and in three of four patients with EI, but not in patients with other systemic rheumatic diseases. Of the 17 patients with B19 DNA, only one had IgG anti-B19 antibody and two had IgM anti-B19 antibodies, whereas IgG and IgM anti-B19 antibodies were detected in 27 (49.1%) and 21 (38.2%) of 55 SLE patients without B19 DNA respectively. All sera from the patients with EI contained both IgG and IgM anti-B19 antibodies. B19 DNA was found more commonly in sera from SLE patients without anti-B19 antibodies than in those with anti-B19 antibodies (P<0.05).

Conclusions. B19 infection in patients with SLE may be due to lack of anti-B19 antibodies because of either the immunocompromised nature of the host or the use of immunosuppressive drugs. There was a higher prevalence of hypocomplementaemia and RP in patients with parvovirus B19 viraemia than in those without parvovirus B19 viraemia.

KEY WORDS: Human parvovirus B19, Systemic lupus erythematosus, Nested PCR, Hypocomplementaemia, Raynaud's phenomenon.

Correspondence to: G. J. Tsay, Department of Medicine and Institute of Immunology, Chung Shan Medical and Dental College, 110 Sec. 1, Chien Kuo N. Road, Taichung 402, Taiwan.


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