Complete genome sequence of an Indian outbreak strain of chikungunya virus

Eshna Laha1,2, Deepak Jena1, Viplov K Biswas1,3

  • 1Institute of Life Sciences, Bhubaneswar, India.

Insights

Researchers sequenced the complete genome of an Indian chikungunya virus strain from a 2005-2006 outbreak. This provides crucial data on the virus

Area of Science:

  • Virology
  • Genomics
  • Epidemiology

Background:

  • Chikungunya virus (CHIKV) causes febrile illness with significant morbidity.
  • Large-scale outbreaks of chikungunya have occurred in India, necessitating genomic surveillance.
  • Understanding viral genetic makeup is key to tracking spread and evolution.

Purpose of the Study:

  • To determine the complete genome sequence of a specific Indian strain of chikungunya virus.
  • To provide genomic data from the 2005-2006 chikungunya outbreak in India.

Main Methods:

  • Isolation of chikungunya virus from an infected patient.
  • Whole-genome sequencing of the isolated viral strain.
  • Bioinformatic analysis of the resulting genome sequence.

Main Results:

  • The complete genome sequence of an Indian chikungunya virus strain was determined.
  • The genome length was identified as 11,811 nucleotides.
  • A poly(A) tail of 29 residues was found at the 3' end of the genome.

Conclusions:

  • This study reports the first complete genome sequence of an Indian chikungunya virus strain from the 2005-2006 outbreak.
  • The genomic data contributes to the understanding of chikungunya virus diversity in India.
  • This sequence data can serve as a reference for future epidemiological and evolutionary studies.

Related Concept Videos

Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic of...
Investigation of Disease Outbreaks01:23

Investigation of Disease Outbreaks

Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...
Arboviral Encephalitis01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...