This report contains genetic and antigenic characterization data generated at the Worldwide Influenza Centre for viruses with collection dates after 31 January 2023 until 31 August 2023.
This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 17-23 December 2023 and includes updates on cholera, SARS-CoV-2 variant classification, avian influenza in fur farms, hepatitis A, pertussis, a cluster of extensively drug-resistant Shigella Sonnei among men who have sex with men, and an overview of respiratory virus epidemiology in the EU/EE.
Several viral and bacterial respiratory pathogens are expected to continue co-circulating at variable levels during the coming months, and contribute to increased morbidity and mortality during this period. This is typical of every winter season.
In 2022, the first and second most reported zoonoses in humans were campylobacteriosis and salmonellosis, respectively. The number of cases of campylobacteriosis and salmonellosis remained stable in comparison with 2021.
Lymphogranuloma venereum (LGV) is a systemic sexually transmitted infection (STI) caused by Chlamydia trachomatis serovars L1, L2, or L3. In 2021, 1 124 cases of LGV were reported by 23 EU/EEA Member States.