Multiple families with children, including all individuals who had primary cases, attended the
house party. Many of the children present were less than 5 years old. Reported activities at
the event included playing with baby chicks, bottle feeding a calf that was being kept in a pen in
the yard during the house party, and playing in a small “kiddie” pool that was purchased and
filled the day of the event. Attendees ate a picnic lunch; each individual ate food that was
brought to the party by his or her own family. Parents of the ill children reported that not all of
them had direct contact with the calf. However, attendees did report that there was calf
manure in the yard where the children were playing, outside of the pen where the calf was held
for the duration of the party. The four primary cases all reported playing in the “kiddie” pool
and getting splashed in the face and mouth.