| rio grande--a new phlebotomus fever group virus from south texas. | three strains of a new phlebotomus fever group virus were isolated from pack rats (neotoma micropus) collected in south texas during 1973--1974; the name rio grande was proposed for this virus. the virus is ph 3.0 labile, sensitive to the action of sodium deoxycholate and heat (56 degrees c) labile. the results of a serosurvey indicated that pack rats are probably the principal vertebrate host for rio grande virus and that year-round transmission of the virus may occur. because no isolations of ... | 1977 | 20785 |
| characterization of a leishmania isolate from the rodent host neotoma micropus collected in texas and comparison with human isolates. | we report the biological and biochemical parameters of leishmania parasites (mneo/us/90/wr972) isolated from a rodent host, neotoma micropus, collected in texas. footpad inoculations of wr972 promastigotes into balb/c mice and syrian hamsters resulted in ulcerating lesions six and eight weeks post-inoculation, respectively. using monoclonal antibody-stained touch preparations, amastigotes were found in the liver of both laboratory hosts. infection of j774 macrophages with wr972 promastigotes sup ... | 1991 | 1763798 |
| new host and locality records of coccidia (apicomplexa: eimeriidae) from rodents in the southwestern and western united states. | one hundred forty-seven murid and heteromyid rodents were collected from various sites in the southwestern and western united states (arizona, colorado, new mexico, texas, and utah) and baja california norte, mexico, and their feces were examined for coccidial parasites. of these, 53 (36%) were infected with at least 1 coccidian; 45 of 53 (85%) of the infected rodents harbored only 1 species of coccidian. infected rodents included: 10 of 22 (45%) neotoma albigula, 3 of 11 (27%) neotoma floridana ... | 1991 | 1779282 |
| isolation of leishmania mexicana from neotoma micropus collected in texas. | a female neotoma micropus infected with leishmania was collected in zavala county, texas, on 15 january 1990. the infection was limited to lesions at the bases of the ears, and the parasite grew readily in schneider's drosophila medium supplemented with 20% fetal bovine serum. isozyme analysis determined the parasite to be leishmania mexicana. | 1990 | 2213421 |
| 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 |
| isolation of leishmania mexicana (kinetoplastida: trypanosomatidae) from lutzomyia anthophora (diptera: psychodidae) collected in texas. | three of 27 female lutzomyia anthophora (addis) collected in texas from the nest of a southern plains woodrat, neotoma micropus baird, during october 1991 were infected with flagellate protozoans. isolates were grown in schneider's drosophila medium supplemented with 20% fetal bovine serum, and isozyme analysis of two of the isolates determined the parasites to be leishmania mexicana (biagi). these are the first isolations of leishmania from field-collected sand flies in north america north of m ... | 1993 | 8510126 |
| leishmaniasis in texas: epidemiology and clinical aspects of human cases. | twenty-seven autochthonous cases of cutaneous leishmaniasis in texas were identified by contact with dermatologists and state health department officials, and by a review of medical records, pathology reports, and previously published case reports. fifteen cases were previously unreported. although the date of onset of the first recognized case was 1903, in 20 of the cases the date of onset of the lesion(s) was in 1980-1989. twelve cases were female; 15 were male. age at diagnosis ranged from tw ... | 1996 | 8940988 |
| natural host relationships and genetic diversity of whitewater arroyo virus in southern texas. | the purpose of this study was to refine our knowledge of the natural host relationships of whitewater arroyo (wwa) virus. two hundred eight rodents, representing nine species, were captured in july 1999 on the chaparral wildlife management area in southern texas and tested for evidence of arenavirus infection. antibody to an arenavirus was found in seven (21.9%) of 32 southern plains woodrats (neotoma micropus) and none of 168 other rodents. infectious wwa virus was isolated from four antibody-p ... | 2002 | 12363054 |
| temporal and spatial distribution of leishmania mexicana infections in a population of neotoma micropus. | a 19-month mark-release-recapture study of neotoma micropus with sequential screening for leishmania mexicana was conducted in bexar county, texas, usa. the overall prevalence rate was 14.7% and the seasonal prevalence rates ranged from 3.8 to 26.7%. nine incident cases were detected, giving an incidence rate of 15.5/100 rats/year. follow-up of 101 individuals captured two or more times ranged from 14 to 462 days. persistence of l. mexicana infections averaged 190 days and ranged from 104 to 379 ... | 2003 | 12764430 |
| catarina virus, an arenaviral species principally associated with neotoma micropus (southern plains woodrat) in texas. | the purpose of this study was to define the taxonomic relationship of an arenavirus principally associated with the southern plains woodrat (neotoma micropus) in southern texas to other new world arenaviruses. the results of independent analyses of glycoprotein precursor amino acid sequences and nucleocapsid protein amino acid sequences indicated that the arenavirus in southern texas is novel (proposed species name catarina virus) and phylogenetically most closely related to whitewater arroyo vi ... | 2007 | 17978080 |
| serological response of cats to experimental besnoitia darlingi and besnoitia neotomofelis infections and prevalence of antibodies to these parasites in cats from virginia and pennsylvania. | abstract besnoitia darlingi and besnoitia neotomofelis are cyst-forming tissue apicomplexan parasites that use domestic cats ( felis domesticus ) as definitive hosts and opossums ( didelphis virginiana ) and southern plains woodrats ( neotoma micropus ) as intermediate hosts, respectively. nothing is known about the prevalence of b. darlingi or b. neotomofelis in cats from the united states. besnoitia darlingi infections have been reported in naturally infected opossums from many states in the u ... | 2011 | 21506782 |
| besnoitiosis in a southern plains woodrat (neotoma micropus) from uvalde, texas. | abstract recently, besnoitia neotomofelis was described from a southern plains woodrat (neotoma micropus) from southern texas. during may 2010, 1 of 55 southern plains woodrats trapped in uvalde county, texas was diagnosed with besnoitiosis. grossly, the woodrat had bilateral swellings of the cheeks and numerous besnoitia sp.-like cysts were observed in the tongue, facial region, musculature of the limbs, and subcutis of the dorsum and flanks. little to no inflammation was noted around cysts. th ... | 2011 | 21524194 |
| parasites and vector-borne pathogens of southern plains woodrats (neotoma micropus) from southern texas. | from 2008 to 2010, southern plains woodrats (neotoma micropus) from southern texas, were examined for parasites and selected pathogens. eight helminth species were recovered from 97 woodrats including, trichuris neotomae from 78 (prevalence = 80%), ascarops sp. from 42 (43%), nematodirus neotoma from 31 (32%), raillietina sp. from nine (9%), taenia taeniaeformis larvae from eight (8%), and an unidentified spiurid, a scaphiostomum sp. and a zonorchis sp. each from a single woodrat. besnotia neoto ... | 2011 | 22108764 |
| ecology of catarina virus (family arenaviridae) in southern texas, 2001-2004. | a total of 3941 rodents were captured during a 46-month prospective (mark-recapture) study on the ecology of catarina virus in southern texas. antibody reactive against catarina virus was found in 73 (11.9%) of 611 southern plains woodrats (neotoma micropus) and none of 3330 other rodents; strains of catarina virus were isolated from 6 antibody-negative and 9 antibody-positive southern plains woodrats; and the infections in at least 3 southern plains woodrats were chronic. these results affirm t ... | 2012 | 23210637 |
| 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 |
| diversity among tacaribe serocomplex viruses (family arenaviridae) associated with the southern plains woodrat (neotoma micropus). | the southern plains woodrat (neotoma micropus) is the principal host of catarina virus in southern texas and a natural host of other north american tacaribe serocomplex viruses. the objectives of this study were to increase our knowledge of the genetic diversity among tacaribe serocomplex viruses associated with n. micropus and to define better the natural host relationships of these viruses. pairwise comparisons of complete glycoprotein precursor gene sequences and complete nucleocapsid protein ... | 2013 | 24161346 |