Since July 2011, 155 cases of the variant influenza A(H3N2) virus (A(H3N2)v) have been detected in the US: Hawaii (1), Indiana (113), Iowa (3), Maine (2), Ohio (30), Pennsylvania (3), Utah (1), and West Virginia (2). Most cases reported in Indiana and Ohio are recent cases. No human to human transmission has been determined among these recent cases.
This academic article describes virological findings and pathological consequences of a strain of influenza A(H3N8) recently identified as part of the investigations of an outbreak of pneumonia among harbour seals in New England in the autumn.
A report in the US Centers for Disease Control and Prevention (CDC) MMWR this week describes the investigation of mild respiratory illness among swine and people at a county fair in Indiana, USA between 8 and 14 July 2012. This is an important report as it is very clearly documents simultaneous detection of H3N2v influenza viruses in humans and swine in close contact.
On 25 and 26 of July, two additional cases of soft-tissue anthrax among injecting drug users have been reported from the United Kingdom and Denmark. The genetic typing of the strains related to these cases is ongoing.
Further human cases of West Nile fever have been reported for the EU and its neighbourhood over the past week. Every Friday ECDC publishes on its website the West Nile fever maps, the information being based on cases reported up to the Thursday of each week.