Volume 9, Number 11—November 2003
Research
Ebola Hemorrhagic Fever Transmission and Risk Factors of Contacts, Uganda1
Paolo Francesconi*, Zabulon Yoti†, Silvia Declich*
, Paul Awil Onek‡, Massimo Fabiani*, Joseph Olango‡, Roberta Andraghetti*, Pierre E. Rollin§, Cyprian Opira†, Donato Greco*, and Stefania Salmaso*
, Paul Awil Onek‡, Massimo Fabiani*, Joseph Olango‡, Roberta Andraghetti*, Pierre E. Rollin§, Cyprian Opira†, Donato Greco*, and Stefania Salmaso*
Table 1
Definitions used in the chain of transmission of Ebola hemorrhagic fever
| Classification | Definition Crude RR(95%CI) P-value |
|---|---|
| Study patients |
The three laboratory-confirmed case-patients from whom we retrospectively identified the other case-patients and their contacts |
| Index patients |
The nine case-patients retrospectively identified from the study patients as the source of infection (including primary case-patients) |
| Primary case-patients |
The three earliest patients for whom we were not able to identify the source of infection |
| Collateral case-patients |
Cases generated by the index patients, or by other collateral case-patients, and identified by matching the list of contacts of these persons with the list of reported cases |
| Postprimary case-patients |
Case-patients for whom we were able to identify the source of infection |
| Contacts |
Persons exposed to a case-patient, listed by the surveillance teams using the definition reported in the background section. |
| Healthy contacts | Contacts in whom the disease did not develop within 21 days of the last exposure |
1This paper is dedicated to Dr. Matthew Lukwiya, Medical Superintendent of St. Mary’s Hospital Lacor, and the other health staff who contracted and died of Ebola while taking care of hospital patients.
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