| cholelithiasis in the cottonrat, sigmodon hispidus, from the high plains of texas. | a high prevalence (71%) of gallstones was noted in free-ranging cottonrats, sigmodon hispidus, collected from one site in lubbock county, texas. the gallbladder of affected animals was distended and filled with white, soft, friable, cholesterol gallstones of variable sizes. focal hyperplasia of the epithelium and connective tissue layer of the gallbladder was evident in affected cottonrats. as the forage available to affected animals was different from that available to gallstone-free animals co ... | 1978 | 650786 |
| observations on the involvement of wildlife in an epornitic of chlamydiosis in domestic turkeys. | in an investigation of potential wildlife reservoirs of chlamydia psittaci at the site of an acute, highly fatal epornitic of chlamydiosis in domestic turkeys in texas, various species of wild birds and rodents were captured and tested for chlamydial serum antibodies and chlamydiae in their tissues. thirteen (65%) of 20 blackbirds (agelaius sp), 4 (44%) of 9 killdeer (oxyechus vociferus), 3 (27%) of 11 sparrows (passer sp) and 1 of 4 mourning doves (zenaidura macroura) were seropositive, but chl ... | 1976 | 988009 |
| predation of cattle fever ticks by hispid cotton rats in south texas. | | 1987 | 3325626 |
| geographic variation in litter size in the cotton rat (sigmodon hispidus): factors influencing ovulation rate. | litter size in many mammalian populations varies along a gradient of latitude or altitude. this investigation tested the hypothesis that geographic variation in litter size among populations of the cotton rat is the result of differences in ovulation rate. oviducts and uteri of virgin and recently mated lab-reared descendants of cotton rats from kansas (ks), texas (tx), and tennessee (tn) were flushed on the day following the last day of estrus. ovulation rates differ significantly among the thr ... | 1985 | 3899204 |
| leishmaniasis in texas: prevalence and seasonal transmission of leishmania mexicana in neotoma micropus. | the annual prevalence of leishmania mexicana in neotoma micropus from 16 southern texas localities was determined by screening 192 n. micropus using in vitro culture. eight woodrats also were screened using the polymerase chain reaction (pcr). forty-six sigmodon hispidus from four localities were also tested. seasonal transmission was investigated through trap-recapture studies at three localities and analysis of infections in juveniles. fourteen n. micropus from four localities were culture-pos ... | 1995 | 7625538 |
| prevalence of antibodies to arenaviruses in rodents from the southern and western united states: evidence for an arenavirus associated with the genus neotoma. | the objectives of this study were to extend our knowledge of the geographic distribution and rodent host range of arenaviruses in north america. sera from wild rodents collected from the southern and western united states were tested for antibody against tamiami, pichinde, junin, and lymphocytic choriomeningitis viruses, using an indirect fluorescent antibody test. antibody to at least one arenavirus was found in 220 (3.1%) of 7,106 rodents tested. the antibody-positive animals included mus musc ... | 1996 | 8686773 |
| cocirculation of multiple hantaviruses in texas, with characterization of the small (s) genome of a previously undescribed virus of cotton rats (sigmodon hispidus). | an environmental and laboratory investigation was conducted after a fatal childhood case of hantavirus pulmonary syndrome occurred in deaf smith county, texas in may 1995. a trapping campaign was conducted to identify possible rodent carriers. six species of murid and heteromyid rodents were collected, and at least one hantavirus-seropositive specimen was found in each of the five murid species. tissues from a selection of 11 seropositive specimens were examined by the polymerase chain reaction ... | 1996 | 9025697 |
| genetic heterogeneity of borrelia burgdorferi sensu lato in the southern united states based on restriction fragment length polymorphism and sequence analysis. | fifty-six strains of borrelia burgdorferi sensu lato, isolated from ticks and vertebrate animals in missouri, south carolina, georgia, florida, and texas, were identified and characterized by pcr-restriction fragment length polymorphism (rflp) analysis of rrf (5s)-rrl (23s) intergenic spacer amplicons. a total of 241 to 258 bp of intergenic spacers between tandemly duplicated rrf (5s) and rrl (23s) was amplified by pcr. msei and drai restriction fragment polymorphisms were used to analyze these ... | 2001 | 11427560 |
| geographical distribution of rodent-associated hantaviruses in texas. | the purpose of this study was to increase our knowledge of the geographic distribution and natural host range of hantaviruses in texas, southeastern new mexico, and mexico. blood samples from 3,225 wild rodents, representing 34 species, were tested for hantavirus antibody (igg), using an enzyme-linked immunosorbent assay. hantavirus antibody was found in one or more rodents from each of 13 counties in texas, otero county in southeastern new mexico, and mexico state (central mexico). the 133 anti ... | 2001 | 11469186 |
| endemic infections of parastrongylus (=angiostrongylus) costaricensis in two species of nonhuman primates, raccoons, and an opossum from miami, florida. | parastrongylus (=angiostrongylus) costaricensis was first reported in the united states from cotton rats, sigmodon hispidus, in texas in 1979. here, we report the findings of p. costaricensis in a siamang (hylobates syndactylus) from the miami metrozoo, in 2 ma's night monkeys (aotus nancymaae) from the dumond conservancy located at monkey jungle in miami, in 4 raccoons (procyon lotor) trapped near the metrozoo, and in an opossum (didelphis virginiana) trapped at the metrozoo. these records are ... | 2006 | 16729706 |
| southern plains woodrats (neotoma micropus) from southern texas are important reservoirs of two genotypes of trypanosoma cruzi and host of a putative novel trypanosoma species. | trypanosoma cruzi, the causative agent of chagas' disease, is an important public health and veterinary pathogen. although human cases are rare in the united states, infections in wildlife, and in some areas domestic dogs, are common. in 2008 and 2010, we investigated t. cruzi prevalence in possible vertebrate reservoirs in southern texas, with an emphasis on southern plains woodrats (neotoma micropus). infection status was determined using a combination of culture isolation, polymerase chain re ... | 2013 | 23127189 |
| a review of gongylonema spp. (nematoda: gongylonematidae) in north american rodents with description of a new species from the cotton rat, sigmodon hispidus (mammalia: cricetidae). | gongylonema archboldi n. sp. (nematoda: gongylonematidae) is described from tunnels in the gastric mucosa of the stomach of the cotton rat (sigmodon hispidus) from highlands county, florida, u.s.a. measurements are also given for specimens from cotton mice (peromyscus gossypinus), oldfield mice (peromyscus polionotus), florida mice (podomys floridanus), and golden mice (ochrotomys nuttalli) from the same locality. additional specimens were collected from the cotton rat and the rice rat (oryzomys ... | 2016 | 27394819 |
| muleshoe virus and other hantaviruses associated with neotomine or sigmodontine rodents in texas. | the broad objective of this study was to increase our knowledge of muleshoe virus and other hantaviruses associated with cricetid rodents in texas. anti-hantavirus antibody was found in 38 (3.2%) of 1171 neotomine rodents and 6 (1.8%) of 332 sigmodontine rodents from 10 texas counties; hantaviral rna was detected in 23 (71.9%) of 32 antibody-positive rodents. analyses of nucleocapsid protein gene sequences indicated muleshoe virus infection in four hispid cotton rats (sigmodon hispidus) from nor ... | 2017 | 28714801 |