Transfusion Transmissible Infections: Maximizing Donor Surveillance

Ayesha Junaid · Shafain Sheikh

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Blood donation and transfusion practices HIV/AIDS Research and Interventions Blood transfusion and management

Abstract

Introduction The World Health Organization (WHO) recommends that all blood transfusion services must screen donated blood for human immunodeficiency virus (HIV) one and two, hepatitis B, hepatitis C and syphilis. A mandatory screening for malaria is also warranted in malaria endemic areas. Our study aimed at analyzing the prevalence and different diagnostic methods of screening transfusion transmitted infections (TTIs) in replacement and voluntary, non-remunerated donors in the blood bank of a tertiary care hospital in Islamabad, Pakistan. Methods The cross-sectional, descriptive study was conducted on 30,470 blood donors from July 2015 to October 2017, in the blood bank of a 500-bed teaching hospital in Islamabad. Initially all blood donors were screened for HIV one, HIV two, hepatitis B and hepatitis C by serological testing. The seronegative samples were further tested by nucleic acid amplification test (NAT). Malaria was screened using immuno-chromatographic antigen-detection tests, while treponema pallidum was screened by electrochemiluminescence immunoassay to detect treponema pallidum (TP) antibodies. All infected blood and blood products were discarded and donors were contacted. The donors were deferred from blood donation according to WHO guidelines. They were also counselled and referred to the infectious diseases clinic. The collected data was analyzed on IBM's statistical package for the social sciences (SPSS) version 21. Results The results revealed that amongst the 30,470 donors, 997 (3.27%) donors were found infected with one or more TTI while 29,473 (96.73%) donors were found safe. Individuals who tested positive on serology for hepatitis B were 322 (1.06%), hepatitis C were 392 (1.29%) and HIV were 49 (0.16%). The seronegative donors were tested by NAT. NAT on seronegative samples showed that 10 (0.03%) donors tested positive for hepatitis B virus deoxyribonucleic acid, while only three (0.01%) were positive for hepatitis C ribonucleic acid. No donor was found positive for HIV by NAT testing. Syphilis testing revealed a frequency of 228 (0.75%) positive results while only five (0.02%) donors were found infected with malaria. Conclusion The results testify that standardized blood component screening can save transmission of infections through blood transfusion. They also establish the superiority of NAT screening over serological tests in decreasing the residual risk of transfusion transmitted infections.

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References

2011International survey on NAT testing of blood donations: expanding implementation and yield from 1999 to 2009 2016Prevalence of transfusion transmissible infections in blood donors of Pakistan 2012Need for Nucleic Acid Testing in Countries with High Prevalence of Transfusion-Transmitted Infections 2010Nucleic acid testing (NAT) in high prevalence–low resource settings 2017Three-Year Experience in NAT Screening of Blood Donors for Transfusion Transmitted Viruses in Croatia 2015Impact of nucleic acid amplification test on screening of blood donors in Northern Pakistan 2017Silent killers: Transfusion Transmissible Infections-TTI, among asymptomatic population of Pakistan.

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