TABLE 1.
Characteristics of the CDC-assisted investigations of M. pneumoniae infections, 2006–2013
| Characteristic | No. (%) of investigations |
|---|---|
| Total CDC-assisted investigations (2006–2013) | 17 |
| Sporadic cases | 4 (23.5) |
| Clustera | 3 (17.6) |
| Outbreak | 10 (58.8) |
| Epi-Aid response | 3 (18) |
| Associated with educational institution | 7 (41) |
| Evidence of household transmissionb | 5 (29) |
| Extrapulmonary involvementc | 2 (12) |
| Macrolide resistance detectedc | 8 (47) |
a
Two to three cases with an epidemiological connection.
b
Not evaluated in all investigations.
c
Documented in at least one patient.