Prevalencia de marcadores del virus de la hepatitis B en donantes de sangre cubanos

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Abstract

RESUMEN Introducción: La incidencia de la hepatitis B en Cuba se redujo notablemente desde la incorporación de la vacuna cubana Heberbiovac HB. Objetivo: Determinar la prevalencia de marcadores del virus de la hepatitis B en donantes de sangre de tres provincias y la persistencia de los anticuerpos contra el antígeno de superficie de este virus en donantes nacidos posterior a la introducción de la vacuna cubana en el Programa Nacional de Inmunización. Métodos: Se aplicó el diseño de un estudio de prevalencia. Se incluyeron 433 donantes que acudieron a los bancos de sangre de las provincias La Habana, Villa Clara y Santiago de Cuba, entre enero y diciembre de 2018. Se detectaron los marcadores HBsAg, anti-HBc y anti-HBs; este último en donantes con edades entre 18 a 26 años. Se realizó la proteína C reactiva (PCR) en tiempo real para identificar la replicación viral en individuos positivos al HBsAgo al anti-HBc. Resultados: La prevalencia de HBsAg y de anti-HBc fue de 1,15 % (5/433) y 7,85 % (38/433), respectivamente. En los individuos nacidos después de la introducción de la vacuna, la prevalencia de HBsAg y anti-HBc fue 0 % y 0,95 %, respectivamente. El 36,1 9 % (38/105) de estos donantes tenían niveles protectores de anti-HBs (≥ 10 UI/L). El ADN viral se detectó en un donante positivo al HBsAg y anti-HBc; no se identificó infección oculta por el virus de la hepatitis B. Conclusiones: La prevalencia del HBsAg es baja en donantes de sangre cubanos, con tendencia a ser nula en donantes nacidos después de la aplicación de la vacuna cubana Heberbiovac HB.

Translated abstract

ABSTRACT Introduction: The incidence of hepatitis B in Cuba has decreased significantly since incorporation of Cuban vaccine Heberbiovac HB. Objective: To determine the prevalence of hepatitis B virus markers in blood donors from three provinces and the persistence of antibodies against surface antigen of this virus in blood donors born after introduction of Cuban vaccine in the National Immunization Program. Methods: The design of a prevalence study was applied. We included 433 donors who attended the blood banks of the provinces of Havana, Villa Clara and Santiago de Cuba, between January and December 2018.The HBsAg, anti-HBc and anti-HBs markers were detected; the latter was detected in donors aged 18-26 years. The real-time analysis of C-reactive protein (CRP) was performed to identify viral replication in individuals positive to HBsAg-positive and to anti-HBc. Results: The prevalence of HBsAg and anti-HBc was 1.15% (5/433) and 7.85% (38/433), respectively. In individuals born after introduction of the vaccine, the prevalence of HBsAg and anti-HBc was 0% and 0.95%, respectively. 36.19% (38/105) of these donors had protective levels of anti-HBs (≥10UI/L). Viral DNA was detected in a donor positive to HBsAg and to anti-HBc. Hidden infection with the hepatitis B virus was not identified. Conclusions: The prevalence of HBsAg is low among Cuban blood donors, with a tendency to be null in donors born after application of Cuban vaccine Heberbiovac HB.

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The weight of obesity on the human immune response to vaccination.

Scott D. Painter, Inna G. Ovsyannikova, Gregory A. Poland (2015)

Despite the high success of protection against several infectious diseases through effective vaccines, some sub-populations have been observed to respond poorly to vaccines, putting them at increased risk for vaccine-preventable diseases. In particular, the limited data concerning the effect of obesity on vaccine immunogenicity and efficacy suggests that obesity is a factor that increases the likelihood of a poor vaccine-induced immune response. Obesity occurs through the deposition of excess lipids into adipose tissue through the production of adipocytes, and is defined as a body-mass index (BMI) ≥ 30 kg/m(2). The immune system is adversely affected by obesity, and these "immune consequences" raise concern for the lack of vaccine-induced immunity in the obese patient requiring discussion of how this sub-population might be better protected.

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Current prevalence of chronic hepatitis B and C virus infection in the general population, blood donors and pregnant women in the EU/EEA: a systematic review

S. H. I. HOFSTRAAT, A. FALLA, E Duffell … (2017)

SUMMARY This systematic review aimed at estimating chronic hepatitis B (HBV) and C virus (HCV) prevalence in the European Union (EU) and Economic Area (EEA) countries in the general population, blood donors and pregnant women. We searched PubMed©, Embase© and Cochrane Library databases for reports on HBV and HCV prevalence in the general population and pregnant women in EU/EEA countries published between 2005 and 2015. Council of Europe data were used for HBV and HCV blood donor prevalence. HBV general population estimates were available for 13 countries, ranging from 0·1% to 4·4%. HCV general population estimates were available for 13 countries, ranging from 0·1% to 5·9%. Based on general population and blood donor estimates, the overall HBV prevalence in the EU/EEA is estimated to be 0·9% (95% CI 0·7–1·2), corresponding to almost 4·7 million HBsAg-positive cases; and the overall HCV prevalence to be 1·1% (95% CI 0·9–1·4), equalling 5·6 million anti-HCV-positive cases. We found wide variation in HCV and HBV prevalence across EU/EEA countries for which estimates were available, as well as variability between groups often considered a proxy for the general population. Prevalence estimates are essential to inform policymaking and public health practice. Comparing to other regions globally, HBV and HCV prevalence in the EU/EEA is low.

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Hepatitis B, HIV, and Syphilis Seroprevalence in Pregnant Women and Blood Donors in Cameroon

Jodie Dionne-Odom, Rahel Mbah, Nicole Rembert … (2016)

Objectives. We estimated seroprevalence and correlates of selected infections in pregnant women and blood donors in a resource-limited setting. Methods. We performed a cross-sectional analysis of laboratory seroprevalence data from pregnant women and voluntary blood donors from facilities in Cameroon in 2014. Rapid tests were performed to detect hepatitis B surface antigen, syphilis treponemal antibodies, and HIV-1/2 antibodies. Blood donations were also tested for hepatitis C and malaria. Results. The seroprevalence rates and ranges among 7069 pregnant women were hepatitis B 4.4% (1.1–9.6%), HIV 6% (3.0–10.2%), and syphilis 1.7% (1.3–3.8%) with significant variability among the sites. Correlates of infection in pregnancy in adjusted regression models included urban residence for hepatitis B (aOR 2.9, CI 1.6–5.4) and HIV (aOR 3.5, CI 1.9–6.7). Blood donor seroprevalence rates and ranges were hepatitis B 6.8% (5.0–8.8%), HIV 2.2% (1.4–2.8%), syphilis 4% (3.3–4.5%), malaria 1.9%, and hepatitis C 1.7% (0.5–2.5%). Conclusions. Hepatitis B, HIV, and syphilis infections are common among pregnant women and blood donors in Cameroon with higher rates in urban areas. Future interventions to reduce vertical transmission should include universal screening for these infections early in pregnancy and provision of effective prevention tools including the birth dose of univalent hepatitis B vaccine.