Simultaneous Presentation of Parvovirus B19 Infection and Systemic Lupus Erythematosus in a Patient: Description and Review of the Literature
Paul Chabert, Hatem Kallel
Intensive Care Unit, Cayenne General Hospital, Cayenne, French Guiana
Doi: 10.12890/2020_001729 - European Journal of Case Reports in Internal Medicine - © EFIM 2020
Received: 15/05/2020
Accepted: 21/05/2020
Published: 19/10/2020

How to cite this article: Chabert P, Kallel H. Simultaneous presentation of Parvovirus B19 infection and systemic lupus erythematosus in a a patient: description and review of the literature. EJCRIM 2020;7 doi:10.12890/2020_001729.

Conflicts of Interests: The authors declare there are no competing interests.
This article is licensed under a Commons Attribution Non-Commercial 4.0 License

ABSTRACT

We present the case of a 25-year-old woman without medical history, presenting with acute respiratory failure needing mechanical ventilation. Aetiologic screening showed PVB19 primary infection and concomitant SLE flare-up. We discuss the causative interactions between PVB19 and SLE in the pathogenesis of the disease. Difficulty diagnosing inaugural SLE flare-up concomitant with PVB19 infection can lead to delayed diagnosis and treatment. Inversely, overtreating a SLE-mimicking PVB19 infection with immunosuppressive agents can be highly detrimental.

LEARNING POINTS

KEYWORDS

Parvovirus B19, systemic lupus erythematosus, acute respiratory distress syndrome, critical care

INTRODUCTION

Parvovirus B19 (PVB19) is a DNA virus. Its transient replication is often asymptomatic, or can classically cause erythema infectiosum, acute polyarthritis, anaemia and aplastic crisis. Systemic lupus erythematosus (SLE) is an auto-immune disease, it can cause multi-organ flare-up including skin eruption, arthritis, haemolysis, renal, heart and lung involvement. Infectious agents are proposed to act as triggers for auto-immunity (“viral hypothesis” [1]). PVB19 manifestations sometimes show intriguing similarities to SLE [2, 3]. We describe the case of a 25-year-old critically ill woman presenting PVB19 primary infection and concomitant inaugural SLE flare-up. We review the literature on the links between PVB19 and SLE and discuss whether PVB19 can elicit SLE.

CASE DESCRIPTION

A 25-year-old woman was admitted to our intensive care unit, for febrile acute respiratory failure, polyarthralgia and rash. She had no medical history and no anterior apparent SLE-compatible symptoms. The first symptoms appeared 2 weeks earlier with febrile diffuse arthromyalgia and cough. Clinical findings at admission showed: sinus tachycardia without murmur, bilateral crackles, oxygen desaturation, no joint swelling, malar macular rash, digital purpura and buccal ulcerations. Chest CT showed bilateral interstitial infiltration, with alveolar opacities and bilateral pleural effusion (Fig. 1). Initial echocardiography found normal left ventricular systolic function, with little pericardial effusion. Laboratory findings are reported in Table 1. The patient received empiric antibiotherapy with cefotaxime and levofloxacin and diuretic therapy. Despite this, the respiratory state worsened and the patient required invasive protective mechanical ventilation. We noted transitory deterioration of left ventricular global systolic function. She received corticosteroid boluses, intravenous immunoglobulins and cyclophosphamide. In a second phase, while thrombocytopenia persisted, haptoglobin plummeted, reticulocytes increased and schistocytes reached 4.7%. She developed a transient moderate acute kidney injury. Renal biopsy objectified class II mesangial proliferative lupus glomerulonephritis, and capillary thrombi consistent with thrombotic microangiopathy. ADAMTS13 activity was normal. All abnormalities scaled back without plasma exchange. The patient was weaned from mechanical ventilation and discharged from hospital. Long-term follow-up confirmed the persistence of biological auto-immunity and the diagnosis of SLE, its clinical course being now stabilized with oral corticosteroid and immunosuppressive drugs.

Figure 1 (click to enlarge)

Figure 1. Chest CT scan

DISCUSSION

Our patient was a young woman presenting with PVB19 primary infection and concomitant inaugural SLE flare-up. We discuss the roles of both processes in the pathogenesis of her clinical presentation, and causative interactions between PVB19 and SLE. PVB19 often triggers antinuclear antibody production [4]; this is usually transient [5], but is sometimes persistent [3]. Indeed, the presence of antiphospholipid antibodies following PVB19 primary infection is frequently observed [3, 6] and titres of anti-PVB19 antibodies and PVB19 viraemia are higher in SLE patients [7]. Hession et al. [8] reported that acutely PVB19-infected patients with high titres of antinuclear antibodies presented a high risk of persistent SLE. Conversely, Speyer et al. [9] found no association between PVB19 infection and long-term inflammatory joint disease. Thus far, the literature lacks epidemiological evidence of an association between SLE and PVB19 [10, 11]. The literature includes many cases of PVB19 infection mimicking or triggering SLE flare-up [1] with various atypical clinical pictures [3]. SLE 1997 American College of Rheumatology diagnosis criteria [12] include 5 clinical items that can overlap with PVB19 infection (fever, rash, arthritis, anaemia and thrombocytopenia). In our patient, these 5 items were present and could be attributed to both pathological processes. Usual haematological findings encountered in PVB19 infection result from erythroblastopenia. In our patient, the initial anaemia was aregenerative, and thus, attributable to PVB19. PVB19 is probably involved in SLE-associated dilated cardiomyopathy [13, 14], through a mechanism implicating IL-17. Our patient presented transient left ventricular systolic dysfunction. It remains uncertain whether this abnormality was caused by PVB19 or SLE, or if it had another origin such as stress cardiomyopathy. PVB19-induced nephropathy is multifactorial [15, 16] but is often post-infectious glomerulonephritis. Pathological findings in our patient were consistent with SLE glomerulonephritis. In our patient, dermatologic and rheumatologic initial manifestations could be attributed either to SLE or to PVB19. Nevertheless, digital purpura suggests SLE vasculitis or thrombotic microangiopathy. Alveolar haemorrhage can be linked to specific SLE pulmonary end-organ damage, to an undiagnosed infectious pneumonia, to cardiogenic pulmonary oedema or to severe thrombocytopenia. The proposed mechanisms for PVB19-triggered SLE flare-up include molecular mimicry and epitope spreading. Th1 cytokines are increased during PVB19 infection [17] with sustained elevation after viral clearance. These could be involved in SLE-mimicking symptoms of PVB19 infection [18]. The same Th1 cytokines are implicated in SLE pathogenesis [19].

Table 1 (click to enlarge)

Table 1. Initial laboratory findings. Values in red are out of normal range

Lupus-prone mice treated with PVB19 proteins exhibited aggravated disease activity [20]. The production of antibodies with cross-reactivity against keratin, denatured DNA and cardiolipin was observed in these mice [21]. Meyer and others proposed that abnormal apoptosis triggered by PVB19 is responsible for production of autoantigens [22, 23]. Pavlovic et al. [24] proposed that hydrolytic anti-DNA antibodies may target either viral or host DNA. This would lead to cell death, exposure to apoptotic corpses and a break in immunotolerance.

CONCLUSION

Care should be taken when coming to a diagnosis of SLE during PVB19 infection. Our patient exhibited unquestionable SLE manifestations concomitant with PVB19 primary infection. Difficulty in diagnosing inaugural SLE flare-up concomitant with PVB19 infection can lead to delayed diagnosis. Inversely, overtreating an SLE-mimicking PVB19 infection is highly detrimental.

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