Volume 5, Number 1—February 1999
Research
Natural History of Sin Nombre Virus in Western Colorado
Table 2
Incidence of immunoglobulin G antibody reactive with Sin Nombre virus in Peromyscus maniculatus (deer mice) recaptured and sampled at least twice at Fort Lewis (June 1994–October 1997) and P. maniculatus and P. truei (pinyon mice) recaptured and sampled at least twice at Molina, western Colorado (October 1994–October 1997)
Species/ location | Sex | No. at riska | No.of new infections | Cum. % antibody-pos. | Mouse mos. of observationb | Incidencec |
---|---|---|---|---|---|---|
Deer mice/ | Grid A | 38 | 4 | 10.5 | 88 | 4.6 |
Ft. Lewis | male | 17 | 2 | 5.9 | 42 | 4.8 |
female | 21 | 2 | 9.5 | 46 | 4.4 | |
Grid B | 11 | 3 | 27.3 | 27.5 | 10.9 | |
male | 6 | 2 | 33.3 | 22 | 9.1 | |
female | 5 | 1 | 20.0 | 5.5 | 18.2 | |
Grids A + B | 49 | 7 | 14.3 | 115.5 | 6.1 | |
male | 23 | 4 | 17.4 | 64 | 6.3 | |
female | 26 | 3 | 11.5 | 51.5 | 5.8 | |
Deer mice/ | Grid A | 59 | 5 | 8.5 | 179.5 | 2.8 |
Molina | male | 33 | 3 | 11.0 | 94 | 3.2 |
female | 26 | 2 | 7.7 | 85.5 | 2.3 | |
Grid B | 7 | 0 | 0 | 12.0 | 0 | |
male | 4 | 0 | 0 | 7.5 | 0 | |
female | 3 | 0 | 0 | 4.5 | 0 | |
Grids A + B | 66 | 5 | 7.6 | 191.5 | 2.6 | |
male | 37 | 3 | 8.1 | 101.5 | 3.0 | |
female | 29 | 2 | 6.9 | 90 | 2.2 | |
Pinyon mice/ | Grid A | 22 | 1 | 4.5 | 157 | 0.6 |
Molina | male | 10 | 1 | 10.0 | 71 | 1.4 |
female | 12 | 0 | 0 | 86 | 0 | |
Grid B | 15 | 0 | 0 | 33.5 | 0 | |
male | 7 | 0 | 0 | 9 | 0 | |
female | 8 | 0 | 0 | 24.5 | 0 | |
Grids A + B | 37 | 1 | 2.7 | 190.5 | 0.5 | |
male | 17 | 1 | 5.9 | 80 | 1.3 | |
female | 20 | 0 | 0 | 110.5 | 0 |
aNo. of mice antibody-negative at first capture.
bTotal time intervals between successive captures when mice were antibody-negative, plus half the interval when mice changed from antibody-negative to antibody-positive.
cNew infections per 100 mice per month.