Volume 10, Number 6—June 2004
Research
Environmental Exposure and Leptospirosis, Peru
Table 4
Characteristics of rats in Belen and Las Pampas de San Juan de Mirafloresa
| Risk factor | Pampas San Juan | Belen | Comparison of sites | |
|---|---|---|---|---|
| % (pos/total)b |
% (PCR positive/total)b |
p value |
||
| No. rats tested |
4.9 (2/41) |
10.6 (25/235) |
p = 0.392 |
|
| Sexc |
||||
| F |
6.3 (1/16) |
11.6 (15/129) |
p = 0.999 |
|
| M |
4.0 (1/25) |
8.5 (8/94) |
p = 0.683 |
|
| M vs. F comparison |
p = 0.999 |
p = 0.594 |
||
| Age groups |
||||
| Adult |
3.9 (2/41) |
12.0 (18/150) |
p = 0.255 |
|
| Young (presexual) |
0 |
8.8 (6/68) |
p = NA |
|
| Infant |
0 |
5.9 (1/17) |
p = NA |
|
| Trend |
p = NA |
p = 0.328 |
||
| Species |
||||
| Rattus norvegicus |
4.9 (2/41) |
21.7 (18/83) |
p = 0.019 |
|
| R. rattus |
0 |
4.6 (7/151) |
p = NA |
|
| Comparison of rat species | p = NA | p < 0.001 | ||
aPCR, polymerase chain reaction; NA, not applicable.
bLeptospirosis prevalence (number of positive rats/total of rats tested).
cSex was not known for 12 infants.


