Table 4.
Follow-up of 6 Nonautochthonous (Travel-Related or Recent Immigration-Related) Cases of Acute Typhoid Fever and Results of Epidemiological Investigations to Detect Chronic Carriers Among the Household Contacts of These Cases
| Index Case | Household Contacts | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Case ID (Lab ID), Date of Isolation |
Age and Sex (Specimen) |
Country of Birth | Source Country of Immigration-Related Case | Countries Visited by Travel-Related Cases | Follow-up Period | Contacts Sampled/Total Contacts, No. | Sex | Age | Stool Specimens (No. Positive/No. Tested) |
| Case 6 (28-2018), 28-12-2017 |
6 y, M (blood) |
Haiti | Haiti | … | Jan 2019 | 5/9 | F M M F M F M M F |
43 y 48 y 15 y 10 y 10 y 43 y 6 y 34 y 32 y |
0/3 - - 0/3 0/3 0/3 0/3 - - |
| Case 8 (387-2018), 29-01-2018 |
7 y, F (blood) |
Peru | … | Peru | Jan 2019 | 4/4 | F M F M |
28 y 41 y 67 y 70 y |
0/3 0/3 0/3 0/3 |
| Case 9 (1208-2018), 16-04-2018 |
8 y, F (blood) |
Haiti | Haiti | … | Jan 2019 | 4/4 | F M M M |
36 y 34 y 10 y 2 mo |
0/3 0/3 0/3 0/3 |
| Case 19 (2224-2019), 15-08-2019 |
26 y, M (blood) |
Chile | … | Mexico, Panama | Oct 2019 | 1/1 | F | 33 y | 0/4 |
| Case 22 (2319-2019), 29-08-2019 |
25 y, F (stool) |
Peru | … | Peru | Sep 2019 | 2/2 | F M |
27 y 54 y |
0/5 0/5 |
| Case 24 (2854-2019), 13-11-2019 |
26 y, F (blood) |
Mexico | … | Mexico | Dec 2019 | 1/1 | M | 34 y | 0/5 |
Case ID = case number assigned in chronological order; Lab ID = laboratory sample identifier; Date of isolation = day-month-year; Age of the case = years or months, if <2 years of age; Country of birth = self-reported; Source country of immigration-related case was determined by the study team based on all available epidemiologic information collected through household investigations; Follow-up period = the month of initial household investigation, lasting 2–4 weeks; Contacts sampled/total contacts = the number of household contacts who gave consent and stool specimens over the total number of household contacts reported (including absent or nonconsenting contacts); Sex = biological sex of household contact reported by self or family member; Age = age of contact reported by self or family member; Stool specimens (No. positive/No. tested) = the number of stool specimens positive for Salmonella Typhi by quantitative polymerase chain reaction or culture over the total number of stool specimens collected.
Abbreviations: F, female; M, male; -, not available for testing.