Volume 29, Number 7—July 2023
Dispatch
Nonnegligible Seroprevalence and Predictors of Murine Typhus, Japan
Table 1
Characteristic | R. typhi–positive, n = 269 | R. typhi–negative, n = 2,113 | Total, n = 2,382 |
---|---|---|---|
Sex | |||
F | 123 (45.7) | 1,080 (51.1) | 1,203 (50.5) |
M |
146 (54.3) |
1,033 (48.9) |
1,179 (49.5) |
Age group, y | |||
<40 | 2 (0.7) | 109 (5.2) | 111 (4.6) |
41–50 | 11 (4.1) | 269 (12.7) | 280 (11.8) |
51–60 | 15 (5.6) | 350 (16.6) | 365 (15.3) |
61–70 | 71 (26.4) | 695 (32.9) | 766 (32.2) |
71–80 | 113 (42) | 576 (27.2) | 689 (28.9) |
>81 |
57 (21.2) |
114 (5.4) |
171 (7.2) |
Site | |||
Otaki | 180 (66.9) | 891 (42.2) | 1,071 (45) |
Katsuura | 42 (15.6) | 250 (11.8) | 292 (12.2) |
Kameda |
47 (17.5) |
972 (46) |
1,019 (42.8) |
Medical history | |||
None | 227 (84.4) | 1,787 (85) | 2,014 (84.9) |
Scrub typhus | 8 (3.0) | 32 (1.5) | 40 (1.7) |
Japanese spotted fever | 2 (0.7) | 0 | 2 (0.1) |
Both | 0 | 1 (0.1) | 1 (0) |
Unknown | 32 (11.9) | 283 (13.5) | 315 (13.3) |
Missing |
0 |
10 |
10 |
Environmental exposure history | |||
Mountains | |||
Yes | 70 (26) | 456 (21.6) | 526 (22.1) |
No | 199 (74) | 1,657 (78.4) | 1,856 (77.9) |
Agriculture | |||
Yes | 135 (50.2) | 766 (36.3) | 901 (37.8) |
No | 134 (49.8) | 1,347 (63.7) | 1,481 (62.2) |
Bushes† | |||
Yes | 141 (52.4) | 856 (40.5) | 997 (41.9) |
No |
128 (47.6) |
1,257 (59.5) |
1,385 (58.1) |
Environment surrounding the residence | |||
Population density, persons/km2 (5th–95th percentile) | 244 (32–1,207) | 356 (45–3,354) | 306 (44–3,148) |
Missing | 3 | 26 | 29 |
Coasts, m2 (5th–95th percentile) | 0 (0–235,132) | 0 (0–232,102) | 0 (0–233,502) |
Missing | 0 | 3 | 3 |
Forests, m2 (5th–95th percentile) | 307,376 (76,276–664,633) | 269,342 (6,023–616,031) | 273,757 (7,231–621,401) |
Missing | 0 | 3 | 3 |
Farmland, m2 (5th–95th percentile) | 236,624 (14,833–458,114) | 233,350 (0–486,875) | 233,414 (0–483,051) |
Missing | 0 | 3 | 3 |
Rivers and lakes, m2 (5th–95th percentile) | 17,596 (0–101,103) | 13,917 (0–84,788) | 14,279 (0–86,124) |
Missing | 0 | 3 | 3 |
Wilderness, m2 (5th–95th percentile) | 0 (0–27,181) | 0 (0–25,095) | 0 (0–25,391) |
Missing | 0 | 3 | 3 |
*Values are no. (%) except as indicated. Continuous and categorical variable data are presented as median (5th–95th percentile) and frequency (%). †Bushes refer to areas with small trees and weeds.
Page created: May 21, 2023
Page updated: June 20, 2023
Page reviewed: June 20, 2023
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.