Search results for "colina"
showing 10 items of 131 documents
Consequences of organ choice in describing bacterial pathogen assemblages in a rodent population
2017
SUMMARYHigh-throughput sequencing technologies now allow for rapid cost-effective surveys of multiple pathogens in many host species including rodents, but it is currently unclear if the organ chosen for screening influences the number and identity of bacteria detected. We used 16S rRNA amplicon sequencing to identify bacterial pathogens in the heart, liver, lungs, kidneys and spleen of 13 water voles (Arvicola terrestris) collected in Franche-Comté, France. We asked if bacterial pathogen assemblages within organs are similar and if all five organs are necessary to detect all of the bacteria present in an individual animal. We identified 24 bacteria representing 17 genera; average bacterial…
Sympatric Ixodes-tick species: pattern of distribution and pathogen transmission within wild rodent populations
2018
AbstractThe generalist tick Ixodes ricinus is the most important vector for tick-borne pathogens (TBP), including Borrelia burgdorferi sensu lato, in Europe. However, the involvement of other sympatric Ixodes ticks, such as the specialist vole tick I. trianguliceps, in the enzootic circulations of TBP remains unclear. We studied the distribution of I. ricinus and I. trianguliceps in Central Finland and estimated the TBP infection likelihood in the most common rodent host in relation with the abundance of the two tick species. Ixodes trianguliceps was encountered in all 16 study sites whereas I. ricinus was frequently observed only at a quarter of the study sites. The abundance of I. ricinus…
Determinación de la respuesta bronquial a adenosina 5'monofosfato y de la concentración de óxido nítrico en aire exhalado en pacientes con colitis ul…
2009
Las manifestaciones pulmonares de la colitis ulcerosa son una de las manifestaciones extraintestinales menos frecuentes. La afectación pulmonar subclínica es mas frecuente que la enfermedad pulmonar activa. En una revisión publicada en el año 2003, los autores destacan como un 62,5% de los casos registrados presentan afectación pulmonar subclinica (alteraciones en la espirometría, volúmenes pulmonares, difusión pulmonar, permeabilidad pulmonar o hallazgos en el lavado broncoalveolar). La determinación de óxido nítrico en aire exhalado (ENO) y la provocación bronquial con adenosina 5´-monofosfato (AMP) y metacolina han permitido estudiar la inflamación y las alteraciones estructurales bronqu…
Response of pineal serotonin N-acetyltransferase activity in male guinea pigs exposed to light pulses at night.
1988
Serotonin N-acetyltransferase (NAT), which is crucial for the formation of melatonin, undergoes a typical day/night rhythm in the pineal gland with low levels during daytime and high levels at night. Short pulses of light given at night have been shown to rapidly depress NAT activity in some species, but not in others, the reasons for this difference being unclear. As diurnality and nocturnality of the experimental animals may play a role and since diurnally active animals have been little investigated in this respect, in the present study the diurnally active guinea pig was investigated. Male guinea pigs kept under a lighting regimen of LD 12:12 (lights off at 1700 hrs) were killed between…
Redemption and home in the african american city upon a hill: hannah crafts’s the bondwoman’s narrative.
2019
The Bondwoman’s Narrative (1857) is a novel in which the black female slave Hannah Crafts aims at the remodeling of her society and to gain self–assertion through a deeply Christian commitment and a total and honest respect to the values it impinges drawing broadly on the Bible and reshaping biblical imagery to convey her message and to submit her subjectivity and her Americanness. By using the national continuum of jeremiad rhetoric and her attachment to the values of the Christian creed, the novel partakes and yet takes a different direction from slave narratives by cagily forerunning Du Bois’s praised theory of the double consciousness. In so doing, it positions its protagonist as the fi…
Loss of density-dependence and incomplete control by dominant breeders in a territorial species with density outbreaks
2011
Abstract Background A territory as a prerequisite for breeding limits the maximum number of breeders in a given area, and thus lowers the proportion of breeders if population size increases. However, some territorially breeding animals can have dramatic density fluctuations and little is known about the change from density-dependent processes to density-independence of breeding during a population increase or an outbreak. We suggest that territoriality, breeding suppression and its break-down can be understood with an incomplete-control model, developed for social breeders and social suppression. Results We studied density dependence in an arvicoline species, the bank vole, known as a terri…
Polyandrous females produce sons that are successful at post-copulatory competition.
2014
Some of the genetic benefit hypotheses put forward to explain multiple male mating (polyandry) predict that sons of polyandrous females will have an increased competitive ability under precopulatory or post-copulatory competition via paternally inherited traits, such as attractiveness or fertilization efficiency. Here, we tested these predictions by comparing the competitive ability of sons of experimentally monandrous and polyandrous female bank voles (Myodes glareolus), while controlling for potential material and maternal effects. In female choice experiments, we found no clear preference for sons of either monandrous or polyandrous mothers. Moreover, neither male type was dominant over …
Exposure to Chemical Cues from Predator-Exposed Conspecifics Increases Reproduction in a Wild Rodent.
2018
Predation involves more than just predators consuming prey. Indirect effects, such as fear responses caused by predator presence, can have consequences for prey life history. Laboratory experiments have shown that some rodents can recognize fear in conspecifics via alarm pheromones. Individuals exposed to alarm pheromones can exhibit behavioural alterations that are similar to those displayed by predator-exposed individuals. Yet the ecological and evolutionary significance of alarm pheromones in wild mammals remains unclear. We investigated how alarm pheromones affect the behaviour and fitness of wild bank voles (Myodes glareolus) in outdoor enclosures. Specifically, we compared the effects…
Description odontométrique comparée du campagnol souterrain d'Orgnac - Microtus (Terricola) mariaclaudiae (Chaline 1972) (Rodentia, Arvicolinae) - du…
2008
8 pages; Le campagnol souterrain d'Orgnac Microtus (Terricola) mariaclaudiae (Chaline 1972) a été décrit du gisement Pléistocène moyen d'Orgnac 3 (Ardèche, France). La comparaison de différentes variables de la première molaire inférieure avec celles d'autres espèces du sous-genre Terricola permet de caractériser la morphologie dentaire de M. (T.) mariaclaudiae et de discuter sa position phylogénétique dans le sous-genre.
Low toenail chromium concentration and increased risk of nonfatal myocardial infarction
2005
Chromium intake may increase insulin sensitivity, glucose tolerance, and the ratio of high density lipoprotein cholesterol to low density lipoprotein cholesterol. However, the epidemiologic evidence on the association between chromium and cardiovascular disease is very limited. To determine whether low toenail chromium concentrations were associated with risk of nonfatal myocardial infarction, the authors conducted an incident, population-based, case-control study in eight European countries and Israel in 1991-1992. Cases (n = 684) were men with a first diagnosis of myocardial infarction recruited from the coronary units of participating hospitals. Controls (n = 724) were men selected rando…