Summary

In Week 16 (April 16–22, 2018), all-cause emergency department activity remained stable across all age groups. Hospitalizations were stable among adults and children aged 2–14 and slightly down among children under 2 years of age (-3.5%, or -124 hospitalizations).

Due to weather conditions, most seasonal conditions were on the rise in Week 16. Notable trends include:

• across all age groups, an increase in insect bites (+103%, or +419 visits) and heatstroke (207 visits in Week 16 compared to 22 in Week 15), with these two indicators accounting for a higher share of all-cause activity than in the previous two years;

• among children aged 2–14 and adults aged 15–74, an increase in visits for allergies (13% and 4.8%, respectively) and burns (35% and 25%, respectively),

• among children, there was an increase in visits for chickenpox (+11.6%, or 59 more visits), conjunctivitis (+5.9%, or 32 more visits), and viral meningitis (fewer than 20 visits).

Among non-specific indicators, there was an increase in visits for dehydration among adults (+19%, or 62 more visits).

Among the most common conditions, there was an increase in urinary tract infections (+20%) and skin conditions (+18%) among children under 2 years of age. Traumatic injuries rose slightly across all age groups (+4% among children and +9% among adults).

Emergency department visits for measles increased in S16 among adults (+29%, or +9 visits).