Table 3.
Proportion of Cases Detected From Testing Stool Specimens From AFP Case-Patients and Contacts, Somalia 2013 (N = 418)
| Number of Contacts (K) | Number Positive Stools Detected by AFP Case-Patient or Kth Contact | Number WPV Detected by Kth Contact Onlya | %WPV Detected by Kth Contact Only | 95% CI |
|---|---|---|---|---|
| 1 | 137 | 25 | 18.2 | 12.7–25.6 |
| 2 | 114 | 13 | 11.4 | 6.8–18.5 |
| 3 | 93 | 5 | 5.4 | 2.3–12.0 |
| 4 | 52 | 3 | 5.8 | 2.0–15.6 |
| 5 | 36 | 0 | 0.0 | .0–9.6 |
| 6 | 10 | 0 | 0.0 | .0–27.8 |
Abbreviations: AFP, acute flaccid paralysis; CI, confidence interval; K, number of specified contacts; WPV, wild poliovirus.
a Three WPV cases were detected by testing >6 AFP case-contacts and were excluded from analysis.