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THE paper by Hou and others (2016), which is summarised on page 114 of this issue of Veterinary Record, presents a study on the molecular epidemiology of feline calicivirus (FCV) at European level. This was a logical step, and the third episode of a trilogy, which started with the studies on the transmission of FCV in infected communities, and then FCV on the molecular epidemiology at country level, in the UK (Coyne and others 2007a, 2012). Understanding the epidemiology of the virus as well as its evolutionary mechanisms (Coyne and others 2007b) is a prerequisite to the development of efficacious control measures.
What do we learn from Hou and others' study? First, that there is a high strain diversity across Europe with limited evidence for geographical clustering; secondly, that there is a high prevalence of FCV infection regardless of the country; and lastly, that there is a lower frequency of infection in …