| trypanosoma cruzi infection in domestic and synanthropic mammals such as potential risk of sylvatic transmission in a rural area from north of antioquia, colombia. | in colombia, dogs and opossum are the most important mammals in domestic and sylvatic t. cruzi transmission. however, the role of both species has not been evaluated in areas where both species converge in the peridomestic area. to evaluate the infection status of domestic and wild mammals in peridomestic habitats of puerto valdivia, antioquia department. the infection of domestic dogs and small wild mammals was performed by hemoculture, molecular and serological methods. additionally, the infec ... | 2020 | 32875129 |
| mammalian deltavirus without hepadnavirus coinfection in the neotropical rodent proechimys semispinosus. | hepatitis delta virus (hdv) is a human hepatitis-causing rna virus, unrelated to any other taxonomic group of rna viruses. its occurrence as a satellite virus of hepatitis b virus (hbv) is a singular case in animal virology for which no consensus evolutionary explanation exists. here we present a mammalian deltavirus that does not occur in humans, identified in the neotropical rodent species proechimys semispinosus the rodent deltavirus is highly distinct, showing a common ancestor with a recent ... | 2020 | 32651267 |
| wild and domestic animals likely involved in rickettsial endemic zones of northwestern colombia. | between 2006 and 2008, three outbreaks of human rickettsiosis occurred in northwestern colombia (municipalities of necoclí, los córdobas and turbo), with case fatality rates between 27% and 54%. the aim of this study was to determine previous exposure of wild and domestic animals to spotted fever group (sfg) rickettsiae through serological tests, to detect rickettsial evidence in their ectoparasites, and to analyze their possible role in the epidemiology of rickettsial diseases in this zone of t ... | 2017 | 28774495 |
| new pudicinae (trichostrongylina, heligmosomoidea) coparasites of proechimys longicaudatus (caviomorpha) from bolivia. i--description of pudica ginsburgi n. sp. and heligmostrongylus chiarae n. sp. | two new pudicinae (trichostrongylina, heligmosomoidea, heligmonellidae) coparasites of proechimys longicaudatus (caviomorph rodent) from bolivia are described: pudica ginsburgi n. sp. is differentiated from all the other species of the genus by the great length of the spicules and of the vestibule and by a different ratio of the length of the spicules on the length of the body. heligmostrongylus chiarae n. sp. has very developed rays 4, strongly divergent from rays 5 as occurs in three other spe ... | 2001 | 11584752 |
| bots (diptera: oestridae) infesting a neotropical forest rodent, proechimys semispinosus (rodentia: echimyidae), in panama. | botfly larvae (cuterebra sp.) infesting spiny rats (proechimys semispinosus) in 8 small islands in the panama canal were studied. rats were live trapped monthly on each island from january 1991 through february 2000 and visually examined for the presence of bots. overall, bot prevalence was 4.6% and differed statistically among island rat populations. rats were simultaneously infested by as many as 4 bots. overall bot intensity was 1.3 bots per infested rat and did not differ among islands. mean ... | 2003 | 14533675 |
| susceptibility of spiny rats (proechimys semispinosus) to leishmania (viannia) panamensis and leishmania (leishmania) chagasi. | the role of proechimys semispinosus as reservoir of leishmania (viannia) panamensis on the colombian pacific coast was experimentally evaluated. the susceptibility to l. chagasi also was assessed to determine the utility of this rodent as a model for studying reservoir characteristics in the laboratory. wild-caught animals were screened for natural trypanosomatid infections, and negative individuals were inoculated intradermally (id) in the snout or feet with 10(7) promastigotes of l. panamensis ... | 2002 | 12386716 |
| the island syndrome in isolated populations of a tropical forest rodent. | i examined population traits of eight isolated populations of a tropical forest rodent (proechimys semispinosus, the central american spiny rat) for 1 year in central panamá. populations were sampled by monthly live-trapping, and seven traits (density, population growth rate, adult survival, reproductive effort, age structure, sex ratio, and body mass) were compared among populations. i also compared results with published data from nearby mainland populations. each isolated population showed ch ... | 1996 | 28307803 |
| seasonal dispersal of arbuscular mycorrhizal fungi by spiny rats in a neotropical forest. | many species of neotropical rodents consume and subsequently disperse viable spores of arbuscular mycorrhizal fungi (amf). consequently, rodents may be important determinants of both amf and tree community composition in neotropical forests. we examined the influence of both availability of other food resources and season on the consumption and subsequent dispersal of amf spores by proechimys semispinosus (the central american spiny rat) from seven island populations located in gatun lake, panam ... | 2002 | 28547554 |
| ecological drivers of hepacivirus infection in a neotropical rodent inhabiting landscapes with various degrees of human environmental change. | anthropogenic environmental change can impact community and population traits such as species diversity and population densities, which have been shown to influence the prevalence of viruses in wildlife reservoirs. in particular, host species resilient to changes in their natural habitat may increase in numbers, which in turn can affect the prevalence of directly transmitted viruses. we have carried out a survey of small mammal communities in three tropical landscapes differing in their degree o ... | 2018 | 29936542 |
| pudicinae (nematoda) coparasitic in proechimys roberti (rodentia: echimyidae) from the brazilian amazonia: description of a new species of pudica, redescription of pudica evandroi (travassos) and updated key to the species of the genus. | the re-examination of nematodes collected decades ago from a spiny rat, proechimys roberti (echimyidae) from pará state, revealed the presence of acanthostrongylus acanthostrongylus travassos, 1937, and two coparasitic species of pudica (heligmonellidae: pudicinae), one of them new to science. pudica minima n. sp. mostly resembles pudica tenua durette-desset, 1970, described from proechimys semispinosus in colombia. nevertheless, it differs from p. tenua by having a synlophe with 12 ridges with ... | 2019 | 31721918 |
| pathogen-associated selection on innate immunity genes (tlr4, tlr7) in a neotropical rodent in landscapes differing in anthropogenic disturbance. | toll-like receptors (tlrs) form part of the innate immune system and can recognize structurally conserved pathogen-associated molecular pattern (pamp) molecules. their functional importance in the resistance to pathogens has been documented in laboratory experimental settings and in humans. tlr diversity, however, has been rarely investigated in wildlife species. how the genetic diversity of tlrs is associated with various pathogens and how it is shaped by habitat disturbance are understudied. t ... | 2020 | 32616896 |