| presence and persistence of intestinal parasites in canine fecal material collected from the environment in the province of chubut, argentine patagonia. | we investigated the presence of intestinal parasites in canine feces collected from public squares in comodoro rivadavia, chubut, argentina (45 degrees s, 68 degrees w) and determined the persistence of echinococcus granulosus eggs in those droppings under natural environmental conditions in that region. in the first experiment, we analyzed 163 fecal samples collected from urban squares during 8 months time and found parasitic elements in 46.6%. the presence of parasites was independent of the c ... | 2003 | 14637028 |
| diagnosis of cystic echinococcosis on sheep farms in the south of argentina: areas with a control program. | in 2000 guarnera et al. proposed using elisa in canine faeces collected from the ground to detect dogs infected with echinococcus granulosus, thus determining sheep farms with active transmission. the objective was to evaluate the prevalence of e. granulosus infection in sheep farms of the patagonia. sheep farms were randomly selected in the provinces of río negro, chubut, neuquén, santa cruz and tierra del fuego (areas with control programs) and la pampa (comparison area). from one to three sam ... | 2004 | 15725535 |
| molecular identification and larval morphological description of contracaecum pelagicum (nematoda: anisakidae) from the anchovy engraulis anchoita (engraulidae) and fish-eating birds from the argentine north patagonian sea. | anisakids use invertebrates as paratenic and/or intermediate hosts as a basic feature of larval transmission. the third-stage larva usually develops in invertebrates which are prey items of finfish paratenic hosts. contracaecum larvae molt twice inside the egg and hatch as free third-stage larvae ensheathed in the second-stage larval cuticle. copepods act as paratenic or obligatory hosts, usually ingesting these free l3 larvae, and fish act as intermediate/paratenic or metaparatenic hosts preyin ... | 2013 | 23500719 |
| three new species and one new record of campylaimus (diplopeltidae, nematoda) from argentine coasts (buenos aires and santa cruz, argentina). | two new campylaimus species from arroyo pareja, buenos aires province and one new species and one new record of campylaimus from puerto san julián, chubut province are described. the three species are characterized by the shape of the copulatory apparatus of the male and the presence of precloacal papillae. campylaimus bonariensis sp. nov. has slender and arcuate spicules, with well-developed cephalization at the proximal end, tubular gubernaculum and three precloacal papillae; campylaimus arcua ... | 2013 | 24698903 |
| population regulation in magellanic penguins: what determines changes in colony size? | seabirds are often studied at individual colonies, but the confounding effects of emigration and mortality processes in open populations may lead to inappropriate conclusions on the mechanisms underlying population changes. magellanic penguin (spheniscus magellanicus) colonies of variable population sizes are distributed along the argentine coastline. in recent decades, several population and distributional changes have occurred, with some colonies declining and others newly established or incre ... | 2015 | 25786254 |
| two new species of free-living marine nematodes of the family oxystominidae chitwood, 1935 (enoplida) with a review of the genus <i>thalassoalaimus</i> de man, 1893 from the argentine coast. | two new free-living marine nematodes of the family oxystominidae are described from san antonio bay (río negro) and san josé gulf (chubut). litinium australis sp. n., is characterized by having a rounded tail, by the first and second crown of cephalic setae with different lengths, gubernaculum with apophysis and by the presence of at least four precloacal papillae; thalassoalaimus nestori sp. n., is characterized by having a conical tail, cephalic setae equal in length, gubernaculum with rounded ... | 2017 | 28610011 |
| population genetic analyses of the powerplex(®) fusion kit in a cosmopolitan sample of chubut province (patagonia argentina). | allele frequencies and forensic parameters for 22 autosomal str loci and dys391 locus included in the powerplex(®) fusion system kit were estimated in a sample of 770 unrelated individuals from chubut province, southern patagonia. no significant deviations from hardy-weinberg equilibrium were observed after bonferroni's correction. the combined power of discrimination and the combined probability of exclusion were >0.999999 and 0.999984, respectively. comparisons with other worldwide populations ... | 2015 | 26275612 |
| natural and anthropogenic hydrocarbons in sediments from the chubut river (patagonia, argentina). | in march of 2001 a study was carried out to evaluate hydrocarbon levels in the lower course of the chubut river. the study included 12 sample stations along the river from san cristóbal bridge to the confluence with the sea, in a 25 km straight-line extension in a urbanized area. in the first 11 stations, resolved aliphatic (rali) hydrocarbons presented low values, between 0.07 and 0.96 microg/g dry weight (dw); the unresolved complex mixture (ucm) between 0.42 and 2.72 microg/g dw, and the tota ... | 2004 | 15111038 |
| [the prevalence of risk factors for coronary arteriosclerosis in the urban areas of the argentine patagonia. a multicenter study]. | it is important to know the prevalence of risk factors for coronary atherosclerosis in the urban south area of argentina in order to implement the prevention of this disease. in 330 males and 322 females of viedma and cipolletti (province of rio negro), and comodoro rivadavia (province of chubut), we determined total cholesterol (ct), triglycerides (tg), hdl cholesterol (chdl), ldl cholesterol (cldl), uric acid (acu), systolic pressure (ps), diastolic pressure (pd), cigarette smokers (cig), and ... | 1992 | 1340881 |
| significance of hydatid immunodiagnostic surveys to health care and estimation of prevalence in the argentine province of chubut. | more hydatidosis cases were detected in an immunodiagnostic survey of rural schoolchildren from an endemic area in argentina by the arc 5 double diffusion (dd5) test than by indirect hemagglutination (iha) and latex agglutination (la) tests. evidence of infection was obtained by clinical, radiologic, echographic, and/or computerized axial tomography examinations in only one of three dd5-negative individuals, and in 2 of 4 students showing a questionable reaction of identity with arc 5 in dd5, wh ... | 1983 | 6410562 |
| review of hospital cases in the assessment of hydatidosis as a health problem in the argentine province of chubut. | a retrospective survey of hospital cases to obtain baseline data on hydatid disease in the northwest of the province of chubut, argentina, from 1973 to 1979 revealed annual mean rates that varied between 13.4 and 75.8 confirmed new cases per 100.000 population. inclusion of data on parasitologically confirmed non-surgical cases and on the geographic origin of patients permitted a more accurate estimate of cases in the four departments comprised in the study area. information on cyst location, cl ... | 1983 | 6624198 |