Persistent parvovirus B19 viremia with chronic arthralgia treated with ascorbic acid: a case report
Journal of Medical Case Reports volume 9, Article number: 1 (2015)
According to some studies, ascorbic acid possesses antiviral properties. These studies were mainly focused on the common cold, with very few focusing on other viral infections.
We report the case of a 54-year-old Caucasian woman with chronic arthralgia due to persistent parvovirus B19 viremia. High doses of ascorbic acid treatment were initiated due to the failure of conventional analgesic therapy. Clinical benefit was observed with a simultaneous loss of biological parvovirus B19 viremia.
This observation shows a potential benefit of the use of ascorbic acid against parvovirus B19 infections, even if this case is not sufficient to draw any definite conclusions.
Most immunocompetent people with detectable specific human parvovirus B19 (pvB19) antibodies do not recall ever having had any specific symptoms. Arthritis and arthralgia during acute pvB19 infection are more commonly observed in adults rather than children. The symptoms typically subside in weeks, although the arthropathy may persist for months in 20% of affected women . Therapeutic options for pvB19 chronic arthralgia are limited. Since it was isolated in the 1930s, ascorbic acid has been proposed for treating viral infections. It became particularly popular in the 1970s when Nobel laureate Linus Pauling’s trials concluded that ascorbic acid could prevent and alleviate the common cold, but these results are still debated . The safety of high doses of ascorbic acid is now well proved, especially by recent work on cancer treatment with high-dose injections over a medium-term duration . The efficacy is fickle for the common cold, probably because high doses are necessary . However, high doses of ascorbic acid seem effective against infectious mononucleosis and shingles [4, 5].
We report the case of a 54-year-old Caucasian woman with no relevant past medical history who presented at an outpatient clinic with unexplained isolated joint pain that had been ongoing for six months. No arthritis, rash, fever or anemia symptoms had been reported at the beginning or during the course of disease. During her physical examination, wrist, elbow, shoulder and knee pain was rated by a visual analog scale (VAS) at 60 out of 100. An initial five-day course of corticosteroid therapy (prednisone, 20 milligrams per day) was initiated by her general practitioner with clinical improvement, but relapse was observed at the end of treatment. A dose of acetaminophen (four to six grams per day) was then prescribed for three weeks, unsuccessfully (VAS=50 out of 100). Finally, a non-steroidal-anti-inflammatory drug ketoprofen was given at 200 milligrams per day for four months, with a moderate efficacy (VAS=30 out of 100) before she was referred to us for medical advice.
Among the tests performed for etiological investigations, high levels of pvB19 immunoglobulin G (IgG) and immunoglobulin M (IgM) were found in her serum and her PCR was positive for six months after the onset of symptoms. Her pvB19 blood serology and PCR were still positive at 11 and 13 months after the onset of symptoms (see Table 1). Her rheumatoid factor, antinuclear, anti-transglutaminase and anti-endomysium immunoglobulin A (IgA) antibodies, as well as anti-gliadin IgG and IgA levels tested at months 11 and 13 were all normal and non-contributive.
Because of persistent circulating pvB19-DNA and poor treatment response, we decided to stop the treatment and to begin oral acid ascorbic at 10 grams per day for 10 days, as suggested in other viral illnesses. At five days after the initiation of treatment, she described an important decrease in symptoms (VAS=5). At three weeks after treatment, a pvB19-PCR analysis on her serum was negative for NS1 protein encoding gene, while her serology was still positive for IgG and IgM. A relapse occurred three weeks after the end of treatment, but she fully recovered after a second administration of the same dose for three complementary weeks. At the time of this report, she remains completely recovered.
Few prior studies have reported on the treatment of persistent isolated joint pains due to pvB19 infection. In cases of acute arthropathy, non-steroidal anti-inflammatory drugs may exert beneficial effects and are often recommended in reviews [6–8], but no therapeutic trial has explored the specific association of pvB19 chronic arthropathy and non-steroidal anti-inflammatory drug efficiency. Intravenous immunoglobulin therapy has been tested in severe arthritis associated with pvB19 infection, with good results in non-isolated arthropathy [9–14], but non-contributive results in the case of isolated severe chronic arthropathy [15–17]. While chloroquine has a wide antiviral activity, in vitro experiments on 4-aminoquinoline drugs and their metabolites suggest that they exacerbate pvB19-associated anemia by promoting replication . While there is no data in vitro or in vivo in the literature on the efficacy of ascorbic acid on pvB19, the safety of high-dose ascorbic acid relative to the potential benefit justifies the prescription of this therapy.
Whilst we are aware that the negativity of the pvB19-PCR analysis and the clinical improvement of our patient may be independent and coincidental, we suggest a possible efficacy when high doses of ascorbic acid are used for treating persistent pvB19 infections. Considering the limited therapeutic options for chronic pvB19-associated joint pain and the lack of side effects associated with ascorbic acid treatment, we suggest using the latter when other therapies have failed.
Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
polymerase chain reaction
visual analog scale.
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This paper has been reviewed in English by the American Journal of Experts, number: G76WVGXP.
The authors declare that they have no competing interests.
LA and BP were responsible for the medical care of the patient. LA wrote the manuscript. ZC performed complementary biological tests and BP edited and prepared this manuscript. All authors read and approved the final manuscript.
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Lallement, A., Zandotti, C. & Brouqui, P. Persistent parvovirus B19 viremia with chronic arthralgia treated with ascorbic acid: a case report. J Med Case Reports 9, 1 (2015). https://doi.org/10.1186/1752-1947-9-1