Volume 18, Number 12—December 2012
Research
Outbreak of Influenza A (H3N2) Variant Virus Infection among Attendees of an Agricultural Fair, Pennsylvania, USA, 2011
Table 2
Characteristics of case-patients with confirmed or probable A(H3N2)v virus infection after attending an agricultural Fair A, Pennsylvania, 2011*
Case-patient no., case status | Age group, y/sex | Underlying condition | Date(s) at fair† | Date of illness onset‡ | Symptoms | Clinical outcome |
---|---|---|---|---|---|---|
1, confirmed | <4/F | No | 3 | 7 | Fever, cough, runny nose | Visited clinic, recovered |
2, confirmed | 4–13/F | No | 0 to 7 | 11 | Feverish, vomiting, abdominal pain | Did not seek medical care, recovered |
3, confirmed | 4–13/F | Yes | 2 to 5 | 5 | Fever, cough, dyspnea, vomiting, diarrhea | Hospitalized, ICU (not mechanically ventilated), recovered |
4, probable | <4/M | No | 4 | 6 | Fever, cough, runny nose, diarrhea | Visited clinic, recovered |
5, probable | <4/F | No | 0 to 3, 5, 6 | 5 | Fever, cough | Did not seek medical care, recovered |
6, probable | <4/M | No | 6 | 12 | Fever, cough, sore throat, runny nose | Did not seek medical care, recovered |
7, probable | <4/F | No | −1§ to 2, 4, 5, 7 | 4 | Feverish, cough | Did not seek medical care, recovered |
*Case-patients 1–7 visited the swine exhibit, and all except case-patient 4 also touched swine. Case-patient 2 exhibited swine with an agricultural club for children (Club X) and was not randomly selected for the cohort study. A(H3N2)v, influenza A (H3N2) variant virus; ICU, intensive care unit.
†Day 0 is the first day fair was open to the public.
‡Illness onset date represents number of days after fair was open to the public.
§Arrived at fairgrounds 1 day before fair was open to the public.