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Published on: November 10, 2023
Measles in Italy: Co-circulation of B3 variants during 2014
Fabio Magurano1, Melissa Baggieri1, Licia Bordi2
1Department of Infectious Parasitic and Immune-Mediated Diseases, National Reference Laboratory for Measles and Rubella, National Institute of Health, Rome, Italy.
Abstract:
In 2013, the majority of the WHO/EUR countries reported an annual incidence of >1 case per one million population indicating that the elimination target is far from being met. Thus, there is the urgent need to uncover and analyze chains of measles virus (MV) transmission with the objective to identify vulnerable groups and avoid possible routes of introduction of MV variants in the European population. The analysis of molecular epidemiology of MV B3 strains identified in 2014 has shown that four different variants co-circulated in Italy, including the strain that caused a cruise-line ship outbreak at the beginning of the year.
Insights
Measles virus (MV) elimination targets remain unmet in Europe. Analysis revealed four MV B3 variants circulating in Italy in 2014, highlighting transmission chains needing urgent investigation to prevent outbreaks.
Area of Science:
- Virology
- Epidemiology
- Public Health
Background:
- Measles virus (MV) elimination targets set by the World Health Organization European Region (WHO/EUR) were not met in 2013, with most countries exceeding one case per million population.
- The continued circulation of measles indicates a need to understand transmission dynamics to prevent widespread outbreaks and the introduction of new MV variants.
Purpose of the Study:
- To analyze the molecular epidemiology of measles virus (MV) B3 strains circulating in Italy in 2014.
- To identify chains of MV transmission, vulnerable populations, and potential routes for MV variant introduction into the European population.
Main Methods:
- Molecular epidemiology analysis of measles virus (MV) B3 strains.
- Identification and characterization of co-circulating MV variants.
Main Results:
- Four distinct measles virus (MV) B3 variants were identified co-circulating in Italy in 2014.
- One identified strain was linked to a measles outbreak on a cruise ship early in the year.
Conclusions:
- The findings underscore the ongoing challenge of measles elimination in Europe.
- Understanding molecular epidemiology is crucial for identifying transmission hotspots and preventing future outbreaks.
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