| survey for ixodes spp. and borrelia burgdorferi in southeastern wisconsin and northeastern illinois. | forested areas adjacent to milwaukee, wis., and chicago, ill., were investigated for rodents and ticks infected with borrelia burgdorferi, the causative agent of lyme disease. white-footed mice (peromyscus leucopus or peromyscus maniculatus), meadow voles (microtus pennsylvanicus), and eastern chipmunks (tamias striatus) were captured; and specimens from these animals were cultured for b. burgdorferi to define whether the midwestern lyme disease area currently encompasses these large metropolita ... | 1991 | 2007650 |
| lyme disease ecology in wisconsin: distribution and host preferences of ixodes dammini, and prevalence of antibody to borrelia burgdorferi in small mammals. | lyme disease recently has been recognized in wisconsin. trapping studies were conducted at four geographically separate and ecologically distinct regions in wisconsin to elucidate the distribution and host preferences of ixodes dammini on small and medium sized mammals, and the occurrence of antibodies to borrelia burgdorferi in these wild mammals. peak i. dammini larval activity occurred from june-september. nymphs were most active from may-august. white-footed mice (peromyscus leucopus) and ch ... | 1987 | 3605501 |
| observations on a natural cycle of la crosse virus (california group) in southwestern wisconsin. | ecological studies were conducted to document the role of the eastern chipmunk (tramias striatus) as a vertebrate host for la crosse (lac) virus in nature during late summer when aedes triseriatus mosquitoes are most abundant. movement, home range and density of chipmunk populations were determined by trap mark and recapture techniques on grid study areas. the temporal distribution of a. triseriatus was estimated by use of oviposition traps. passive antibodies were found in spring-born juveniles ... | 1974 | 4451237 |
| bloodmeal sources of aedes triseriatus and aedes vexans in a southern wisconsin forest endemic for la crosse encephalitis virus. | the micro enzyme-linked immunosorbent assay (elisa) was used to specifically identify bloodmeal sources of aedes triseriatus say and aedes vexans meigen collected at a site endemic for la crosse (lac) encephalitis virus. deer were the source of 65% of ae. triseriatus and 94% of aedes vexans bloodmeals, respectively. chipmunks and tree squirrels, which are considered to be the major vertebrate amplifying hosts of lac virus, were the sources of 8% and 16%, respectively, of the bloodmeals of ae. tr ... | 1982 | 7072901 |
| natural la crosse virus infection in the red fox (vulpes fulva), gray fox (urocyon cinereoargenteus), raccoon (procyon lotor), and opossum (didelphis virginiana). | natural infection of sentinel red foxes (vulpes fulva) and free-ranging red foxes, gray foxes (urocyon cinereoargenteus) and raccoons (procyon lotor) with la crosse (lac) virus was demonstrated. one isolate of lac virus was obtained from a sentinel red fox in an enzootic area. the viremia titer of the lac virus-infected red fox was above the threshold of infection for aedes triseriatus mosquitoes. antibody responses were measured by the microneutralization test employing four california group vi ... | 1981 | 7258486 |
| comparative phylogeography of eastern chipmunks and white-footed mice in relation to the individualistic nature of species. | palaeoecological studies have demonstrated that ecological communities as a whole did not remain stable throughout the climatic fluctuations of the quaternary. the result is that long-term associations of species cannot be inferred by contemporary associations in ecological communities. therefore, the evolutionary significance of any contemporary ecological interactions among species and of the biotic community within which species have evolved also cannot be assumed from contemporary conditions ... | 2006 | 17054499 |