1
|
Nailescu C, Nelson RD, Verghese PS, Twombley KE, Chishti AS, Mills M, Mahan JD, Slaven JE, Shew ML. Human Papillomavirus Vaccination in Male and Female Adolescents Before and After Kidney Transplantation: A Pediatric Nephrology Research Consortium Study. Front Pediatr 2020; 8:46. [PMID: 32154194 PMCID: PMC7045870 DOI: 10.3389/fped.2020.00046] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 01/28/2020] [Indexed: 01/10/2023] Open
Abstract
Background: Kidney transplant (KT) recipients have higher incidence of malignancies, including Human Papillomavirus (HPV)-associated cancers. Thus, HPV vaccines may have an important role in preventing HPV-related disease in this population; however, immunogenicity and safety data are lacking. Objective: To examine the immunological response and tolerability to HPV vaccination in pediatric KT recipients compared to future KT candidates. Methods: The quadrivalent HPV vaccine was administered to girls and boys age 9-18 recruited from seven centers part of the Pediatric Nephrology Research Consortium. Subjects were recruited for three groups: (1) CKD: chronic kidney disease stages 3, 4, and 5 not on dialysis; (2) Dialysis; (3) KT recipients. The outcome consisted of antibody concentrations against HPV 6, 11, 16, and 18. Geometric mean titers (GMTs) and seroconversion rates were compared. Vaccine tolerability was assessed. Results: Sixty-five participants were recruited: 18 in the CKD, 18 in the dialysis, and 29 into the KT groups. KT patients had significantly lower GMTs after vaccination for all serotypes. The percentages of subjects who reached seroconversion were overall lower for the KT group, reaching statistical significance for HPV 6, 11, and 18. Comparing immunosuppressed subjects (anyone taking immunosuppression medications, whether KT recipient or not) with the non-immunosuppressed participants, the former had significantly lower GMTs for all the HPV serotypes and lower seroconversion rates for HPV 6, 11, and 18. KT females had higher GMTs and seroconversion rates for certain serotypes. There were no adverse events in either group. Conclusions: HPV vaccine was well-tolerated in this population. Pediatric KT recipients had in general lower GMTs and seroconversion rates compared to their peers with CKD or on dialysis. Immunosuppression played a role in the lack of seroconversion. Our results emphasize the importance of advocating for HPV vaccination prior to KT and acknowledge its safety post transplantation. Future studies are needed to investigate the effect of a supplemental dose of HPV vaccine in KT recipients who do not seroconvert and to evaluate the long-term persistence of antibodies post-KT.
Collapse
Affiliation(s)
- Corina Nailescu
- Department of Pediatrics, Indiana University, Riley Hospital for Children, Indianapolis, IN, United States
| | - Raoul D Nelson
- Department of Pediatrics, University of Utah, Primary Children's Hospital, Salt Lake City, UT, United States
| | - Priya S Verghese
- Department of Pediatrics, University of Minnesota Masonic Children's Hospital, Minneapolis, MN, United States
| | - Katherine E Twombley
- Department of Pediatrics, Medical University of South Carolina Children's Hospital, Charleston, SC, United States
| | - Aftab S Chishti
- Department of Pediatrics, Kentucky Children's Hospital, University of Kentucky, Lexington, KY, United States
| | - Michele Mills
- Department of Pediatrics, C. S. Mott Children's Hospital, University of Michigan, Ann Arbor, MI, United States
| | - John D Mahan
- Department of Pediatrics, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, United States
| | - James E Slaven
- Department of Biostatistics, Indiana University, Indianapolis, IN, United States
| | - Marcia L Shew
- Department of Pediatrics, Indiana University, Riley Hospital for Children, Indianapolis, IN, United States
| |
Collapse
|
2
|
Nelson DR, Neu AM, Abraham A, Amaral S, Batisky D, Fadrowski JJ. Immunogenicity of Human Papillomavirus Recombinant Vaccine in Children with CKD. Clin J Am Soc Nephrol 2016; 11:776-784. [PMID: 27055465 PMCID: PMC4858485 DOI: 10.2215/cjn.09690915] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Accepted: 01/25/2016] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND OBJECTIVES There is a disproportionate burden of human papillomavirus (HPV) -related genital tract disease in patients with CKD and kidney transplantation; therefore, the potential effect of the quadrivalent HPV vaccine (Gardasil; Merck GmbH, Darmstadt, Germany) is profound. Immune abnormalities associated with CKD and immunosuppression may prevent optimal vaccine response. Our objective was to determine antibody response to the HPV vaccine in adolescent girls with CKD. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS This cohort study conducted from 2008 to 2012 included 57 girls aged 9-21 years old with CKD (n=25), on dialysis (n=9), or with status postkidney transplantation (n=23) who received the standard three-dose vaccine series of the HPV vaccine recruited from two pediatric nephrology clinics. Antibody levels to HPV genotypes 6, 11, 16, and 18 were measured before vaccine dose 1 (baseline), <12 months after vaccine dose 3 (blood draw 2), and ≥12 months after vaccine dose 3 (blood draw 3). Seropositivity was defined as antibody level above an established threshold for each HPV genotype. Not all participants completed three blood draws. RESULTS Antibody response to all four HPV genotypes was 100% in the CKD and dialysis groups with samples drawn at <12 and ≥12 months after dose 3 of the HPV vaccine. Among patients with transplants, the percentages of patients achieving seropositivity were significantly lower at blood draw 2 for HPV genotypes 6 (63.6%; P=0.003), 11 (63.6%; P=0.003), and 18 (72.7%; P=0.02) and blood draw 3 for HPV genotypes 6 (62.5%; P=0.02), 11 (50%; P=0.001), 16 (75%; P=0.04), and 18 (50%; P=0.001). CONCLUSIONS Antibody response to the quadrivalent recombinant HPV vaccine was robust and sustained in girls and young women with CKD and on dialysis. A less robust response to the vaccine was observed among those with a kidney transplant. Additional study is needed to determine if vaccination before kidney transplantation or an alternative vaccination regimen would benefit transplant recipients.
Collapse
Affiliation(s)
- Delphine R. Nelson
- Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Alicia M. Neu
- Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Alison Abraham
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
| | - Sandra Amaral
- Division of Pediatric Nephrology, University of Pennsylvania School of Medicine and the Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania; and
| | - Donald Batisky
- Division of Pediatric Nephrology, Emory University School of Medicine, Atlanta, Georgia
| | - Jeffrey J. Fadrowski
- Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| |
Collapse
|
3
|
Bitsori M, Galanakis E. Vaccine-preventable infection morbidity of patients with chronic kidney disease and cocoon vaccination strategies. Expert Rev Vaccines 2015; 14:1385-95. [PMID: 26289972 DOI: 10.1586/14760584.2015.1075397] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Individuals with chronic kidney disease (CKD) are vulnerable to vaccine-preventable infections due to impaired immunity, immunosuppressive treatments and dialysis. Protection of CKD patients by vaccination is hampered by reduced efficacy of vaccines and safety concerns for transplant candidates or recipients. 'Cocooning' vaccination policies, targeting the protection of a vulnerable individual through immunization of close contacts, have recently been introduced for infants and, to a lesser degree, for high-risk groups of immunocompromised individuals. In this article, we discuss the potentiality of implementing cocoon strategies for the high-risk group of CKD patients and conclude that this not yet officially recommended policy can substantially contribute to protection against infection and motivate vaccination among families and healthcare workers.
Collapse
Affiliation(s)
- Maria Bitsori
- a Department of Paediatrics, University Hospital, Heraklion 71003, Greece
| | | |
Collapse
|
4
|
Macartney K, Heywood A, McIntyre P. Vaccines for post-exposure prophylaxis against varicella (chickenpox) in children and adults. Cochrane Database Syst Rev 2014; 2014:CD001833. [PMID: 24954057 PMCID: PMC7061782 DOI: 10.1002/14651858.cd001833.pub3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The prevention of varicella (chickenpox) using live attenuated varicella vaccines has been demonstrated both in randomised controlled trials (RCTs) and in population-based immunisation programmes in countries such as the United States and Australia. Many countries do not routinely immunise children against varicella and exposures continue to occur. Although the disease is often mild, complications such as secondary bacterial infection, pneumonitis and encephalitis occur in about 1% of cases, usually leading to hospitalisation. The use of varicella vaccine in persons who have recently been exposed to the varicella zoster virus has been studied as a form of post-exposure prophylaxis (PEP). OBJECTIVES To assess the efficacy and safety of vaccines for use as PEP for the prevention of varicella in children and adults. SEARCH METHODS We searched CENTRAL (2014, Issue 1), MEDLINE (1966 to March week 1, 2014), EMBASE (January 1990 to March 2014) and LILACS (1982 to March 2014). We searched for unpublished trials registered on the clinicaltrials.gov and WHO ICTRP websites. SELECTION CRITERIA RCTs and quasi-RCTs of varicella vaccine for PEP compared with placebo or no intervention. The outcome measures were efficacy in prevention of clinical cases and/or laboratory-confirmed clinical cases and adverse events following vaccination. DATA COLLECTION AND ANALYSIS Two review authors independently extracted and analysed data using Review Manager software. MAIN RESULTS We identified three trials involving 110 healthy children who were siblings of household contacts. The included trials varied in study quality, vaccine used, length of follow-up and outcomes measured and, as such, were not suitable for meta-analysis. We identified high or unclear risk of bias in two of the three included studies. Overall, 13 out of 56 vaccine recipients (23%) developed varicella compared with 42 out of 54 placebo (or no vaccine) recipients (78%). Of the vaccine recipients who developed varicella, the majority only had mild disease (with fewer than 50 skin lesions). In the three trials, most participants received PEP within three days following exposure; too few participants were vaccinated four to five days post-exposure to ascertain the efficacy of vaccine given more than three days after exposure. No included trial reported on adverse events following immunisation. AUTHORS' CONCLUSIONS These small trials suggest varicella vaccine administered within three days to children following household contact with a varicella case reduces infection rates and severity of cases. We identified no RCTs for adolescents or adults. Safety was not adequately addressed.
Collapse
Affiliation(s)
- Kristine Macartney
- Children's Hospital at Westmead and University of SydneyNational Centre for Immunisation Research and Surveillance of Vaccine Preventable DiseasesLocked Bag 4001WestmeadSydneyNSWAustralia2145
| | - Anita Heywood
- University of New South WalesSchool of Public Health and Community MedicineLevel 2, Samuels BuildingGate 11, Botany StreetKensingtonNSWAustralia2052
| | - Peter McIntyre
- Children's Hospital at Westmead and University of SydneyNational Centre for Immunisation Research and Surveillance of Vaccine Preventable DiseasesLocked Bag 4001WestmeadSydneyNSWAustralia2145
| | | |
Collapse
|
5
|
Low LL, Vasanwala FF, Suhail SM. Varicella encephalitis and pneumonia in a patient with end stage renal failure. ASIA PACIFIC FAMILY MEDICINE 2014; 13:4. [PMID: 24555522 PMCID: PMC3974108 DOI: 10.1186/1447-056x-13-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 02/17/2014] [Indexed: 05/15/2023]
Abstract
We describe a patient with end stage renal failure (ESRF) on hemodialysis who was admitted to our department for primary varicella infection complicated by varicella pneumonia and encephalitis. Varicella infections results in serious morbidity and mortality in ESRF dialysis and transplant patients. Evidence published thus far suggests that live attenuated varicella vaccines are effective and safe in ESRF and renal transplant patients. Worldwide a few countries have instituted guidelines for the varicella immunisation in ESRF patients. However, in the Asia Pacific Region, it has not been widely given due to the lack of national consensus guidelines. Our case depicts that primary varicella infection can occur at any time in immunosupressed patients and thus suffer serious consequences from it. With increasing burden of chronic kidney disease, Renal Physicians and Family Physicians in the Asia Pacific Region should meet and study the epidemiological data in each individual country and decide on the consensus guidelines on how the varicella vaccination can be targeted for those at risk.
Collapse
Affiliation(s)
- Lian Leng Low
- Department of Family Medicine and Continuing Care, Singapore General Hospital, Bowyer Block A, Level 2, 169608 Outram Road, Singapore
| | - Farhad Fakhrudin Vasanwala
- Department of Family Medicine and Continuing Care, Singapore General Hospital, Bowyer Block A, Level 2, 169608 Outram Road, Singapore
| | - Sufi Muhammad Suhail
- Department of Renal medicine, Singapore General Hospital, Outram Road, Singapore
| |
Collapse
|
6
|
Prelog M, Schönlaub J, Jeller V, Almanzar G, Höfner K, Gruber S, Eiwegger T, Würzner R. Reduced varicella-zoster-virus (VZV)-specific lymphocytes and IgG antibody avidity in solid organ transplant recipients. Vaccine 2013; 31:2420-6. [PMID: 23583889 DOI: 10.1016/j.vaccine.2013.03.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 02/04/2013] [Accepted: 03/28/2013] [Indexed: 02/01/2023]
Abstract
BACKGROUND Varicella-zoster-virus (VZV) infection may cause significant morbidity and mortality in immunocompromised patients. So far, only IgG-anti-VZV antibody concentrations were used to estimate immunity against VZV, but the antibody binding strength (avidity) together with VZV-specific cellular responses have not been evaluated in solid organ transplant (SOT) recipients. METHODS Thus, we assessed the humoral and cellular immune responses to two doses of the VZV vaccine (vacc) and wild-type VZV infection (wt) in 23 kidney (KTx) and 19 liver transplant (LTx) recipients including children and adults compared to 48 healthy controls (HC) for measurement of IgG-anti-VZV relative avidity index (RAI) and frequency of VZV-specific peripheral blood mononuclear cells (PBMCs) in vaccinated individuals using an adapted ELISA and IFN-gamma ELISPOT, respectively. RESULTS KTx(wt) (median RAI 72.3%) or LTx(wt) (79.2%) and KTx(vacc) (91.0%) or LTx(vacc) (72.5%) showed lower avidities compared to HC(wt) (84.5%) and HC(vacc) (94.0%), respectively, despite equally distributed IgG-anti-VZV concentrations. RAI>60% (high avidity) was detected in all HC, but only in 69.0% of SOT patients. KTx(vacc) (median 64 spot forming units SFU/500,000 PBMCs) and LTx(vacc) (67 SFU) had significantly lower VZV-specific cellular responses compared to HC(vacc) (268 SFU). CONCLUSIONS The diminished cellular reactivity to VZV has to be considered in SOT patients receiving immunosuppressive treatments when evaluating immunity against VZV. IgG antibody avidity and VZV-specific cellular responses may serve as additional markers to evaluate immunity against VZV in SOT recipients. The role of wild-type exposures and endogenous VZV re-activation on long-term immunity in SOT patients has to be awaited to establish recommendations for vaccine spacing in these patients, considering immunogenicity and safety aspects.
Collapse
Affiliation(s)
- Martina Prelog
- Department of Pediatrics, Innsbruck Medical University, Innsbruck, Austria.
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Zuckerman RA, Limaye AP. Varicella zoster virus (VZV) and herpes simplex virus (HSV) in solid organ transplant patients. Am J Transplant 2013; 13 Suppl 3:55-66; quiz 66. [PMID: 23347214 DOI: 10.1111/ajt.12003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 09/06/2012] [Accepted: 09/07/2012] [Indexed: 01/25/2023]
Abstract
Varicella zoster virus (VZV) and the two herpes simplex viruses (HSV) are human α-herpesviruses that establish life-long latency in neural ganglia after initial primary infection. In the solid organ transplant (SOT) population, manifestations of VZV or HSV may be seen in up to 70% of recipients if no prophylaxis is used, some of them life and organ threatening. While there are effective vaccines to prevent VZV primary infection and reactivation in immunocompetent adults, these vaccines are contraindicated after SOT because they are live-virus vaccines. For HSV, prevention has focused primarily on antiviral strategies because the immunologic correlates of protection and control are different from VZV, making vaccine development more challenging. Current antiviral therapy remains effective for the majority of clinical VZV and HSV infections.
Collapse
Affiliation(s)
- R A Zuckerman
- Department of Medicine, Section of Infectious Disease and International Health, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | | |
Collapse
|
8
|
Prelog M, Schönlaub J, Zimmerhackl LB. Aciclovir and varicella-zoster-immunoglobulin in solid-organ transplant recipients. Pediatr Nephrol 2011; 26:663-73. [PMID: 21076967 DOI: 10.1007/s00467-010-1666-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 08/24/2010] [Accepted: 08/25/2010] [Indexed: 02/02/2023]
Abstract
Clear recommendations for the management of acute varicella-zoster virus (VZV) infections for cases of significant exposure and the use of prophylactic drugs after solid-organ transplantation are missing due to the lack of evidence by prospective studies. Heterogeneity in patient groups, patient numbers, age groups, immunosuppressive regimens, timing, and dosage of aciclovir and/or varicella-zoster immunoglobulin (VZIG), pre-transplant vaccination or VZV wild-type infection and inconsistency of data make comparability of different studies impossible. Although the benefit of aciclovir and/or VZIG is uncertain in immunosuppressed children, prospective controlled double-blind studies are not feasible for ethical considerations as fatal cases with disseminating varicella disease are well known in these patient groups despite the use of aciclovir and/or VZIG, whereas severe side-effects of these drugs are rare. However, a reporting bias is likely as mainly severe or fatal cases might have been predominantly published or cases of successfully used aciclovir and/or VZIG in mild cases or in cases of breakthrough infections after vaccination. As neither VZIG prophylaxis nor treatment with intravenous aciclovir offers complete protection against severe VZV infection to immunosuppressed pediatric solid-organ transplant recipients, high priority should be given to vaccination against VZV prior to transplantation, and, most importantly, in their close contact persons. Clinical observations suggest that only assessment of humoral immunity together with cellular immunity may allow predication about protection in exposed patients.
Collapse
Affiliation(s)
- Martina Prelog
- Department of Pediatrics, Medical University Innsbruck, Innsbruck, Austria.
| | | | | |
Collapse
|
9
|
Abstract
Reports about efficacy and safety of live-virus attenuated vaccines in patients before and after transplantation are mainly based on small patient numbers, making general recommendations for this patient population difficult. Children and adults as well as their close relatives and contact persons should be preferably immune to VZV before solid organ transplantation to avoid VZV-associated complications, thus making VZV vaccination necessary in susceptible individuals. The following literature review focused on efficacy and safety of VZV vaccination in pediatric kidney and liver transplant recipients. Review of literature also revealed that in all pediatric transplant candidates, humoral and cellular immunity against VZV should be consistently monitored to assess waning immunity under immunosuppressive treatment. This approach is desirable to estimate the risk of severe varicella disease after exposure in these patients.
Collapse
Affiliation(s)
- Martina Prelog
- Department of Pediatrics, Pediatrics I, Medical University Innsbruck, Anichstr. 35, A-6020 Innsbruck, Austria.
| | | |
Collapse
|
10
|
Macartney K, McIntyre P. Vaccines for post-exposure prophylaxis against varicella (chickenpox) in children and adults. Cochrane Database Syst Rev 2008:CD001833. [PMID: 18646079 DOI: 10.1002/14651858.cd001833.pub2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND Live attenuated varicella vaccines for the prevention of varicella (chickenpox) has been demonstrated both in randomised controlled trials (RCTs) and in population-based immunisation programmes in countries such as the United States. However, many countries do not routinely immunise children against varicella, and exposures continue to occur. Although the disease is often mild, complications such as secondary bacterial infection, pneumonitis and encephalitis occur in about 1% of cases, usually leading to hospitalisation. The use of varicella vaccine in persons who have recently been exposed to the varicella zoster virus has been studied as a form of post-exposure prophylaxis (PEP). OBJECTIVES To assess the efficacy and safety of vaccines for use as PEP for the prevention of varicella in children and adults. SEARCH STRATEGY We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library, 2008, Issue 1); MEDLINE (1966 to February 2008); and EMBASE (January 1990 to February 2008). SELECTION CRITERIA RCTs and quasi-RCTs of varicella vaccine for PEP compared with placebo or no intervention. The outcome measures were efficacy in prevention of clinical cases and/or laboratory-confirmed clinical cases and adverse effects following vaccination. DATA COLLECTION AND ANALYSIS Two review authors independently extracted and analysed data using Review Manager software. MAIN RESULTS Three studies involving 110 healthy children who were siblings of household contacts were identified as suitable for inclusion. The studies varied in quality, study design, vaccine used, and outcomes measured and, as such, were not suitable for meta-analysis. Overall, 13 out of 56 vaccine recipients (18%) developed varicella compared with 42 out of 54 placebo (or no vaccine) recipients (78%). Of the vaccine recipients who developed varicella, the majority only had mild disease (with less than 50 skin lesions). In the three studies, most subjects received PEP within three days following exposure; too few subjects were vaccinated four to five days post exposure to ascertain the efficacy of vaccine given more than three days after exposure. No included studies reported on adverse events following immunisation. AUTHORS' CONCLUSIONS These small trials suggest varicella vaccine administered within three days to children following household contact with a varicella case reduces infection rates and severity of cases. No RCTs for adolescents or adults were identified. However safety was not adequately addressed.
Collapse
Affiliation(s)
- Kristine Macartney
- National Centre for Immunisation Research (NCIRS), Children's Hospital at Westmead, Locked Bag 4001, Westmead, Sydney, NSW, Australia, 2145.
| | | |
Collapse
|
11
|
Baldacci ER, Fagundes SN, Koch VHK. Avaliação da suscetibilidade à varicela no paciente pediátrico portador de insuficiência renal crônica. REVISTA PAULISTA DE PEDIATRIA 2008. [DOI: 10.1590/s0103-05822008000100004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJETIVO: Avaliar a suscetibilidade natural à varicela de crianças e adolescentes portadores de insuficiência renal crônica (IRC). MÉTODOS: Estudo transversal de 83 pacientes com idade acima de 18 meses e inferior a 18 anos, durante 2000 e 2001, com ritmo de filtração glomerular (RFG) abaixo de 70mL/min/1,73m², portando cartão vacinal preconizado pela Fundação Nacional de Saúde e que não receberam nenhuma dose da vacina específica. Do total, três pacientes (3/83) foram excluídos, por terem recebido doses da vacina por meio de órgãos não governamentais. A sorologia foi realizada pelo método Enzyme-Linked Immuno Sorbent Assay, considerando-se títulos sorológicos protetores acima de 100mUA/mL. RESULTADOS: Os pacientes renais crônicos tinham idade mediana de 11 anos, 66% eram masculinos, 60% procedentes do próprio município de São Paulo, com RFG médio de 33,6mL/min/1,73m². O diagnóstico clínico de varicela por profissional médico ocorreu em 39 pacientes; destes, 10% se mostraram soronegativos. Dos 80 pacientes restantes, 21 (26%) apresentaram títulos não protetores para varicela. A prevalência de suscetibilidade em menores de seis anos foi 7,93 (IC95%=3,29-19,12) vezes superior à de maiores de seis anos. CONCLUSÕES: Houve diminuição da suscetibilidade à varicela com a idade. Pacientes abaixo de seis anos foram cerca de oito vezes mais suscetíveis à varicela que os renais crônicos com idade mais avançada e duas vezes mais suscetíveis do que a população pediátrica brasileira de mesma idade.
Collapse
|