| pneumocystosis in wild small mammals from california. | cyst forms of the opportunistic fungal parasite pneumocystis carinii were found in the lungs of 34% of the desert shrew, notiosorex crawfordi (n = 59), 13% of the ornate shrew, sorex ornatus (n = 55), 6% of the dusky-footed wood rat, neotoma fuscipes (n = 16), 2.5% of the california meadow vole, microtus californicus (n = 40), and 50% of the california pocket mouse, chaetodipus californicus (n = 2) caught from southern california between february 1998 and february 2000. cysts were not found in a ... | 2001 | 11310900 |
| bear canyon virus: an arenavirus naturally associated with the california mouse (peromyscus californicus). | thirty-four rodents captured in southern california were studied to increase our knowledge of the arenaviruses indigenous to the western united states. an infectious arenavirus was isolated from 5 of 27 california mice but none of the 7 other rodents. analyses of viral nucleocapsid protein gene sequence data indicated that the isolates from the california mice are strains of a novel tacaribe serocomplex virus (proposed name "bear canyon") that is phylogenetically most closely related to whitewat ... | 2002 | 12095441 |
| detection and characterization of borrelia bissettii in rodents from the central california coast. | this is the first report of borrelia burgdorferi sensu lato in rodents from san luis obispo county, with most isolates obtained from a previously unreported host, neotoma lepida thomas. b. burgdorferi sensu lato was identified in seven rodent species, including the california vole, microtus californicus peale; dusky-footed woodrat, neotoma fuscipes baird; desert woodrat, neotoma lepida thomas; brush mouse, peromyscus boylii baird; california mouse, peromyscus californicus gambel; deer mouse, per ... | 2004 | 15311469 |
| variable infection dynamics in four peromyscus species following experimental inoculation with baylisascaris procyonis. | wild rodents such as peromyscus spp. are intermediate hosts for the zoonotic ascarid baylisascaris procyonis (raccoon roundworm), and previous studies indicate peromyscus leucopus (white-footed mouse) likely serves an important role in parasite ecology. natural infections have been sporadically identified in a few peromyscus spp., but no data are available on differences in susceptibility among the many other species. we compared survival and infection dynamics of b. procyonis in 4 species ( p. ... | 2016 | 27351237 |
| arenavirus antibody in rodents indigenous to coastal southern california. | the purpose of this study was to extend our knowledge on the geographic and natural rodent host ranges of new world arenaviruses in california. sera from 1,094 sigmodontine and 112 murine rodents were tested for antibody against whitewater arroyo and amapari viruses. antibody was found in 55 (4.6%) of the 1,206 rodents: 4 from northwestern san diego county, 3 from los angeles county, and 48 from orange county. the antibody-positive rodents included 8 (7.8%) of 103 neotoma fuscipes, 1 (0.6%) of 1 ... | 2000 | 11289675 |
| hantavirus (bunyaviridae) infections in rodents from orange and san diego counties, california. | during a screening program to determine the extent of hantavirus activity in orange and san diego counties, california, serum samples from 2,365 rodents representing nine genera and 15 species were tested for hantavirus antibodies. a reverse transcription-polymerase chain reaction on selected seropositive rodents was used to identify the specific hantavirus. rodents positive for sin nombre virus (snv) antibodies by western blot included 86 (9.1%) of 948 deer mice (peromyscus maniculatus), four ( ... | 1999 | 9988327 |
| role of small mammals in the ecology of borrelia burgdorferi in a peri-urban park in north coastal california. | the role of small mammals other than woodrats in the enzootiology of the lyme disease spirochete, borrelia burgorferi, was assessed in the peri-urban park. mammals were collected monthly from september through to april. following tick removal, the animals were tested for b. burgdorferi by culture of ear-punch biopsies. larvae and nymphs that were intermediate in morphology between ixodes spinipalpis and ixodes neotomae occurred on several species of rodents (peromyscus truei, peromyscus californ ... | 1997 | 9291589 |
| isla vista virus: a genetically novel hantavirus of the california vole microtus californicus. | prospect hill virus (ph) was isolated from a meadow vole (microtus pennsylvanicus) in 1982, and much of its genome has been sequenced. hantaviruses of other new world microtine rodents have not been genetically characterized. we show that another microtus species (the california vole m. californicus) from the united states is host to a genetically distinct ph-like hantavirus, isla vista virus (ilv). the nucleocapsid protein of ilv differs from that of ph by 11.1% and a portion of the g2 glycopro ... | 1995 | 8847529 |
| responses of natural wildlife populations to air pollution. | deer mice (peromyscus californicus) trapped in areas of los angeles with high ambient air pollution are significantly more resistant to ozone (6.6 ppm for 12 h) than are mice trapped from areas with low ambient pollution (56 versus 0% survival, respectively). laboratory-born progeny of these mice show similar response patterns, indicating a genetic basis to this resistance. young mice (less than 1 yr of age) are more sensitive than older mice (15 versus 44% survival, respectively). sensitivity i ... | 1980 | 7381962 |
| is promiscuity associated with enhanced selection on mhc-dqα in mice (genus peromyscus)? | reproductive behavior may play an important role in shaping selection on major histocompatibility complex (mhc) genes. for example, the number of sexual partners that an individual has may affect exposure to sexually transmitted pathogens, with more partners leading to greater exposure and, hence, potentially greater selection for variation at mhc loci. to explore this hypothesis, we examined the strength of selection on exon 2 of the mhc-dqα locus in two species of peromyscus. while the califor ... | 2012 | 22649541 |
| non-genomic transmission of paternal behaviour between fathers and sons in the monogamous and biparental california mouse. | maternal behaviour has profound, long-lasting implications for the health and well-being of developing offspring. in the monogamous california mouse (peromyscus californicus), care by both parents is critical for offspring survival. we tested the hypothesis that similar to maternal care in rodents, paternal huddling and grooming (hg) behaviour can be transmitted to future generations via behavioural mechanisms. in california mice, testosterone maintains paternal hg behaviour. in the present stud ... | 2013 | 23698012 |
| social and physical environments as a source of individual variation in the rewarding effects of testosterone in male california mice (peromyscus californicus). | despite extensive research revealing the occurrence of testosterone (t) pulses following social encounters, it is unclear how they lead to varied behavioral responses. we investigated the influence of residency (home versus unfamiliar environment) and social/sexual experience (pair-bonded, isolated or housed with siblings) on the plasticity of t's rewarding effects by measuring the development of conditioned place preferences (cpps), a classical paradigm used to measure the rewarding properties ... | 2016 | 27476433 |
| characterization of vocalizations emitted in isolation by california mouse (peromyscus californicus) pups throughout the postnatal period. | rodent species, such as monogamous and biparental california mice, produce vocalizations as a means of communication. a temporal examination of vocalizations produced by california mice pups in isolation was performed. pup recordings were performed for 3 min at ∼10.00 and 14.00 hrs on early postnatal days (pnd) 2-4, 7, 21, and 28. once initial recordings were finished, pups were returned to the home cage with parents and any siblings for 5 minutes to determine if active biparental responses resu ... | 2017 | 28182483 |
| epizootiology of tacaribe serocomplex viruses (arenaviridae) associated with neotomine rodents (cricetidae, neotominae) in southern california. | the objective of this study was to advance our knowledge of the epizootiology of bear canyon virus and other tacaribe serocomplex viruses (arenaviridae) associated with wild rodents in california. antibody (immunoglobulin g [igg]) to a tacaribe serocomplex virus was found in 145 (3.6%) of 3977 neotomine rodents (cricetidae: neotominae) captured in six counties in southern california. the majority (122 or 84.1%) of the 145 antibody-positive rodents were big-eared woodrats (neotoma macrotis) or ca ... | 2015 | 25700047 |
| new species of arostrilepis (eucestoda: hymenolepidiae) in members of cricetidae and geomyidae (rodentia) from the western nearctic. | abstract specimens originally identified as arostrilepis horrida from the nearctic are revised, contributing to the recognition of a complex of cryptic species distributed across the holarctic region. previously unrecognized species are described based on specimens in cricetid (neotominae) and geomyid rodents. arostrilepis mariettavogeae n. sp. in peromyscus californicus from monterey county, california, and a. schilleri n. sp. in thomomys bulbivorus from corvallis, oregon are characterized. c ... | 2011 | 22097959 |