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Evaluation of a Universal Nested Reverse Transcription Polymerase Chain Reaction for the Detection of Lyssaviruses
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TT viruses in animals.

H Okamoto1

  • 1Division of Virology, Department of Infections and Immunity, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke-Shi, Tochigi-Ken 329-0498, Japan. hokamoto@jichi.ac.jp

Current Topics in Microbiology and Immunology
|February 24, 2009
PubMed
Summary
This summary is machine-generated.

Torque teno virus (TTV) infections are widespread across many animal species, not just humans. Research indicates that most animals likely harbor their own unique TTV strains, suggesting broad host specificity.

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Area of Science:

  • Virology
  • Genomics
  • Comparative Medicine

Background:

  • Torque teno virus (TTV) is a ubiquitous, nonenveloped virus with a circular, single-stranded DNA genome.
  • TTV belongs to the Anellovirus genus and is known to infect humans.
  • Previous research has primarily focused on human TTV infections.

Purpose of the Study:

  • To investigate the prevalence and diversity of TTV-like viruses in nonhuman primates and other mammalian species.
  • To compare the genetic characteristics of TTVs across different host species.
  • To explore the potential co-evolution of TTVs with their mammalian hosts.

Main Methods:

  • Utilized highly conserved primers from the human TTV untranslated region for PCR-based detection.
  • Analyzed TTV variants in various nonhuman primates (chimpanzees, macaques, tamarins), pets (cats, dogs), and other mammals (tupaias, pigs).
  • Examined genomic organization and transcriptional profiles of identified TTVs.

Main Results:

  • TTV-like viruses were detected in a wide range of nonhuman primates and other mammalian species, indicating species-specific infections.
  • TTV variants from macaques and tamarins showed divergence from human and chimpanzee TTVs.
  • TTV-like mini virus (TTMV) genotypes in chimpanzees were distinct but interspersed with human TTMV genotypes.
  • Genomic organization and transcriptional profiles of non-human TTVs were similar to human TTVs.

Conclusions:

  • TTV infections are not limited to humans and are prevalent across diverse mammalian species.
  • Species-specific TTVs likely co-evolve with their hosts, suggesting a broad host-virus relationship.
  • Further research is warranted to fully understand the under-examined TTVs in non-primate mammals.