Table 2.
Epidemiologic and clinical characteristics of patients with invasive H. influenzae serotype a disease—United States and Alaska, 2008–2017
| Characteristic | United Statesa (N=386) | Alaska (N=49) |
|---|---|---|
| Age, median (range) | 30 years (0–92) | 1 year (0–77) |
| Sex: | ||
| Male | 50.0% | 61.2% |
| Race: | ||
| White | 59.3% | 4.1% |
| Black | 14.8% | 0.0% |
| AI/AN | 14.8% | 93.9% |
| Asian/PI | 1.3% | 2.0% |
| Unknown | 9.8% | 0.0% |
| Ethnicity: | ||
| Hispanic/Latino | 15.0% | N/A |
| Non-Hispanic/Latino | 68.1% | N/A |
| Unknown | 16.8% | N/A |
| Clinical syndromeb | ||
| Bacteremic pneumonia | 41.3% | 18.4% |
| Bacteremia | 32.0% | 12.2% |
| Meningitis | 23.9% | 38.8% |
| Septic arthritis | 7.8% | 16.3% |
| Cellulitis | 4.4% | 12.2% |
| Epiglottitis | 3.9% | 0.0% |
| Other invasive disease | 0.5% | 2.1% |
| Hospitalized | 94.8% | 87.8% |
| Duration of hospitalization, median (range) | 7 days (0–126) | 8 days (0–68) |
| Diedc | 7.8% | 10.2% |
Abbreviations: AI/AN, American Indian and Alaska Native; N/A, not available; PI, Pacific Islander.
a
Note: data shown in this column are from Active Bacterial Core surveillance sites and do not include all cases in the United States.
b
Information on clinical syndrome was available for 385/386 (99.7%) cases in the United States and 49/49 (100%) cases in Alaska. Clinical syndrome was not mutually exclusive.
c
Information on outcome was available for 384/386 (99.5%) cases in the United States and 49/49 (100%) cases in Alaska.