Summary

• In week 22 of 2017 (May 29–June 4), emergency department visits and hospitalizations for all causes increased slightly across all age groups (+2.3%) and were higher than in the previous two years.

• In week 21, an increase was recorded for most seasonal spring and summer conditions across all age groups. In week 22, this rise continued among adults. In particular, there was an increase in visits for asthma (+28.5%) and viral meningitis (+48%, corresponding to 14 cases). More specifically among people aged 75 and older, there was an increase in visits for conjunctivitis (+20%—12 cases) and heat-related conditions (+17%), driven primarily by diagnoses of dehydration and hyponatremia. Among children, the majority of seasonal and summer conditions remained stable or declined. However, there was an increase in visits for malaise (+20%), viral meningitis (+76%—19 cases), and asthma among children aged 2 to 14 (+8%).

• Among the most frequently seen conditions in emergency departments (excluding seasonal conditions), there was an increase in visits for abdominal pain in adults (+6%) and children (+13%), for neurological disorders in children (+13%), and for renal colic and anxiety disorders in adults (+15% and +11%, respectively). There was also a continued increase in visits for skin and subcutaneous infections among children aged 2 to 14 (+19%).