|Year : 2018 | Volume
| Issue : 3 | Page : 207-209
Recurrent parvovirus B19 infection in postrenal transplant recipient
Kim Jacob Mammen, Jija Elizabeth Varghese, Viral Shah, Amit Tuli
Department of Urology, CMC, Ludhiana, Punjab, India
|Date of Web Publication||28-Sep-2018|
Dr. Kim Jacob Mammen
Department of Urology, CMC, Ludhiana, Punjab
Source of Support: None, Conflict of Interest: None
Anemia after solid organ transplantation is common and can be infectious or noninfectious. We present a case of recurrent PV infection in a patient of renal transplant. Early diagnosis and management of such infection is very important.
Keywords: Anemia, latent infection, parvovirus, red cell aplasia, renal transplant
|How to cite this article:|
Mammen KJ, Varghese JE, Shah V, Tuli A. Recurrent parvovirus B19 infection in postrenal transplant recipient. Indian J Transplant 2018;12:207-9
|How to cite this URL:|
Mammen KJ, Varghese JE, Shah V, Tuli A. Recurrent parvovirus B19 infection in postrenal transplant recipient. Indian J Transplant [serial online] 2018 [cited 2018 Dec 11];12:207-9. Available from: http://www.ijtonline.in/text.asp?2018/12/3/207/242429
| Introduction|| |
Parvovirus (PV) B19 is a recognized cause of red cell aplasia in a transplant patient. It is a known cause of erythema infectiosum, polyarthropathy syndromes, erythroid hypoplasia, and aplastic anemia in healthy individuals. In renal transplant recipients, PV B19 infection may enter the body through the respiratory tree or transplanted organ or may be reactivated from a latent infection. PVB19 infection is defined as the detection of PVB19 in clinical samples or as a positive PVB19 IgM serological test result. PVB19 disease is also defined as PVB19 infection in the presenceof anaemia, with clinical symptoms or bone marrow biopsy findings consistent with the diagnosis. There are no established guidelines forscreening for B19 infection in organ transplant recipients. Although there is insufficient evidence for universal screening of all donors and recipients, there is evidence to support screening in patients who have moderate to severe anaemia and for whom other causes of anaemia have been excluded.
| Case Report|| |
A 60-year-old male, who underwent renal transplantation on September 5, 2013, for immunoglobulin (IgA) nephropathy, presented with generalized weakness and malena for 10 days. He was on triple immunosuppressant, namely, prednisolone 10 mg OD, mycophenolate mofetil 750 mg in the morning, and 500 mg in the night and tacrolimus 2 mg BD. On admission, the patient was severely anemic, but with no systemic abnormality. He had a similar history 3 months ago. On esophageal tissue biopsy, he was then diagnosed to have cytomegalovirus (CMV), and polymerase chain reaction (PCR) test identified PV B19. He was given intravenous (IV) ganciclovir 500 mg daily for 14 days followed by valganciclovir 900 mg once daily for 14 days. He had also received IV IgG 20 g in 100 ml normal saline OD for 5 days. He was discharged in satisfactory condition.
At present, he was admitted with recurrence of symptoms and investigations revealed hemoglobin of 6% g, TLC 3100/cumm, platelets 1.2 lacs, urea 40 mg/dl, and serum creatinine was 1.4 mg/dl. The electrolyte levels and liver function studies were normal. Peripheral smear examination showed mild anisopoikilocytosis with occasional elliptical cells. CMV DNA was found to be negative. The patient underwent bone marrow biopsy [Figure 1] which showed erythroid hypoplasia with few giant erythroblasts showing intracellular inclusions strongly consistent with recurrent parvovirus (PV) infection [Figure 2]. To confirm these findings PCR test for PV B19 was performed which came out to be positive. On quantification study, it was 4 × 104 copies/ml.
|Figure 1: Bone marrow aspiration showing giant proerythroblast with prominent nucleoli and cytoplasmic blebs|
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The patient was started on IV IgG therapy in dose of 5 g in 100 ml NS for 5 days. At present, he is on low dose IgG prophylaxis with 400 mg/month. His blood parameters improved after treatment. On discharge, his blood investigations were Hb 10.2% g, TLC 6500/cumm, platelets 1.6 lacs along with normal renal parameters.
| Discussion|| |
PVB19 infection is defined as the detection of PVB19 in clinical samples or as a positive PVB19 IgM serological test result. PVB19 disease is also defined as PVB19 infection in the presence of anemia, with clinical symptoms or bone marrow biopsy findings consistent with the diagnosis.
There are no established guidelines for screening for B19 infection in organ transplant recipients. Although there is insufficient evidence for universal screening of all donors and recipients, there is evidence to support screening in patients who have moderate-to-severe anemia and for whom other causes of anemia have been excluded from the study.
For most immunocompetent individuals, serologic testing for B19 virus-specific antibodies is most practical and is measured using enzyme immunoassays, which usually use recombinant capsid proteins. Furthermore, in organ transplant recipients, diagnosis by serology can be confounded by administration of blood products or Ig after transplantation, because these therapies may produce false-positive IgG antibody tests. Thus, identification of the viral DNA by PCR is preferred for diagnosis in these patients.
The approach to therapy of infection depends on host factors such as immune status, underlying conditions, and manifestations of infection. Commercial Ig (IVIG), a significant source of anti-B19 antibodies, has proved to be efficacious, although no controlled studies have been carried out. Various regimens have been reported with favorable outcomes, but on the basis of the pooled data, 400 mg/kg per d for 5–10 consecutive days seems to be clinically useful in most cases. Although the mode of transmission of B19 infection in the normal host is mostly through the respiratory tract, it is less well defined in the transplant setting. Certainly, the short-time lapse between transplantation and onset of illness that has been reported in some has the characteristic of donor-transmitted disease, but this is often difficult to prove.
The postrenal transplant state on immunosuppression therapy is now recognized as one of the settings for CMV and PV B19 induced red cell aplasia. Tacrolimus and mycophenolate therapy has been associated with these infections. It is important to diagnose these infections in postsolid organ transplant patients not only because they are treatable but also to prevent nosocomial infections to other patients. The bone marrow biopsy showed characteristic cytomorphologic features of PV B19 infection. There was an excellent response to IgGs. Diagnosis of such infection requires high amount of suspicion, mainly in posttransplant cases with anemia that is unresponsive to vitamin supplementation and erythropoietin.
Although clinical response is common as evidenced by reticulocytosis, increased hemoglobin levels, and decline in serum viral DNA, complete eradication of viremia may not occur in some patients, particularly in transplant patients, who are highly immunosuppressed. Thus, relapses of anemia can occur up to several months after completion of treatment. Repeated administration of IVIG may be helpful, but some patients experience multiple relapses. Reduction of immunosuppressive medication is often recommended in addition to IVIG (or without IVIG in less severe cases) to allow the patient's own immune response to mature and neutralize the virus.,,,
| Conclusion|| |
Recurrent PV B19 infection in postrenal transplant patients under immunosuppressant therapy presents as anemia unresponsive to vitamin supplementation and erythropoietin. Early and prompt diagnosis and treatment with IgGs can give excellent results.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]