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[Measles virus].

Fumio Seki1, Makoto Takeda2

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This summary is machine-generated.

Measles virus, a highly infectious pathogen, utilizes specific cell receptors for entry. While vaccines are effective, maintaining immunity is crucial as vaccine-induced protection can decrease over time.

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Area of Science:

  • Virology
  • Immunology
  • Epidemiology

Background:

  • Measles virus is a highly infectious agent causing measles, a significant childhood mortality cause.
  • Viral entry relies on signaling lymphocytic activation molecule (SLAM) on immune cells and nectin-4 on epithelial cells, impacting pathogenesis.
  • Despite effective live attenuated vaccines, measles elimination efforts are ongoing, with reduced circulating genotypes (B3, D8).

Purpose of the Study:

  • To explore advancements in measles virus genotyping and outbreak tracking methods.
  • To assess the effectiveness of current vaccines against different measles genotypes.
  • To highlight the importance of sustained protective immunity in vaccinees.

Main Methods:

  • Analysis of viral receptor usage in measles pathogenesis.
  • Genotyping of measles virus using conventional N gene sequencing.
  • Exploration of whole-genome sequencing and M-F non-coding region analysis for outbreak tracking.

Main Results:

  • Measles virus employs SLAM and nectin-4 for cellular entry, influencing disease progression.
  • New genotyping methods are being evaluated for enhanced case association and outbreak tracking.
  • Current live attenuated vaccines demonstrate efficacy against all circulating measles genotypes.

Conclusions:

  • Maintaining protective immunity is increasingly vital due to potential waning of vaccine-induced immunity over time.
  • Genomic surveillance advancements are crucial for monitoring measles virus evolution and spread.
  • While vaccines are effective, long-term immunity strategies may be necessary for sustained measles control.