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TT virus infections among blood donors in Iceland: prevalence, genotypes, and lack of relationship to serum ALT levels.

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Authors
Löve, A
Stanzeit, B
Li, L
Olafsdottir, E
Gudmundsson, S
Briem, H
Widell, A
Issue Date
2000-03-01

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Citation
Transfusion. 2000, 40(3):306-9
Abstract
BACKGROUND: The TT virus (TTV) is a newly identified blood-borne virus. Its association with disease is still unknown, and screening of blood donors has not been implemented. Several genotypes of the TTV have been identified. STUDY DESIGN AND METHODS: Three hundred seventy healthy blood donors were randomly selected and tested for TTV by the PCR method. Sequencing of a part of the genome was performed to identify various genotypes of the virus. ALT levels were determined in both infected and uninfected individuals. RESULTS: The TT virus (TTV), was detected in the sera of 23 (6.2%) of 370 healthy Icelandic blood donors; this prevalence is lower than that reported in Japan but higher than that in Scotland. The virus was found in all groups over the age of 19. Sequencing and phylogenetic analysis of 202 bp from open reading frame 1 demonstrated genotypes 1b and 2b 2c and genotype 4 isolates, with the latter bearing 89-percent nucleotide homology with other genotype 4 sequences deposited at GenBank. One sample showed a mixed genotype 1b/2c infection. Serum ALT levels were within normal limits in all infected individuals. CONCLUSION: The TTV carrier state does not cause significant liver injury.
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http://dx.doi.org/10.1046/j.1537-2995.2000.40030306.x
ae974a485f413a2113503eed53cd6c53
10.1046/j.1537-2995.2000.40030306.x
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