| genetic variation and epidemiology of echinococcus granulosus in argentina. | polymerase chain reaction-ribosomal its-1 dna (rdna) restriction fragment length polymorphism (pcr-rflp) analysis and sequencing of the mitochondrial cytochrome c oxidase subunit 1 (co1) and nadh dehydrogenase 1 (nd1) genes were used to characterize 33 echinococcus granulosus isolates collected from different regions and hosts in argentina, and to determine which genotypes occurred in humans with cystic hydatid disease. the results of the study demonstrated the presence of at least 4 distinct ge ... | 1999 | 10363285 |
| seroprevalence of toxoplasma gondii in sows from slaughterhouses and in pigs from an indoor and an outdoor farm in argentina. | the objective of the present study was to determine the prevalence of toxoplasma gondii antibodies from slaughter sows and from pigs raised at an indoor and an outdoor swine farm. serum samples were obtained from 230 slaughter sows belonging to 83 farms distributed in 5 provinces. blood samples were collected monthly from pigs of different ages from an intensive management indoor farm (farm 1). a cross-sectional study was carried-out from an outdoor farm (farm 2). all sera were tested for t. gon ... | 2004 | 15381296 |
| [molecular study of argentine strains of bacillus anthracis]. | bacillus anthracis is one of the most monomorphic bacteria known and epidemiological studies of this microorganism have been hampered by the lack of molecular markers. for the genotyping of fourteen argentine field strains and the vaccine strain steme 34f2 the presence or absence of the virulence plasmids as well as vrra locus containing a variable-number tandem repeat (vntr) and presenting a polymorphism involving five variants, were analyzed. strains were isolated from cows, sheep and pigs dur ... | 2007 | 17702250 |
| [serovars of salmonella enterica subspecies enterica and its antimicrobial resistance in slaughterhouse pigs]. | a study was carried out in order to determine the prevalence of salmonella and its serovars among porcine slaughterhouses, to evaluate the antimicrobial resistance profiles and to know the presence of class 1 integrons as possible reservoir of resistance. from a total of 386 samples from four porcine slaughterhouses of buenos aires and santa fe provinces (argentina), 93 (24.1%) salmonella enterica subspecies enterica strains were identified, 52 (55.9%) from cecal contents and 41 (44.1%) from ile ... | 2009 | 19831314 |
| arbovirus investigations in argentina, 1977-1980. iv. serologic surveys and sentinel equine program. | serologic surveys of wild and domestic birds, wild mammals, and horses were conducted during arbovirus field studies in argentina from 1977 through 1980, a non-epizootic interval. the prevalence of neutralizing antibodies to eastern equine encephalitis (eee) was consistently higher than to western equine encephalitis (wee) virus in all species and all areas. the presence of antibodies in short-lived avian species and in young unvaccinated horses and the demonstration of seroconversions in horses ... | 1985 | 2863991 |