| arbovirus investigations in argentina, 1977-1980. ii. arthropod collections and virus isolations from argentine mosquitoes. | prospective surveys for arboviruses were carried out in santa fe, corrientes, and chaco provinces, argentina, aperiodically during 1977-1980. a total of 313,233 mosquitoes and 598 biting flies other than mosquitoes were collected and tested for virus in 5,197 and 45 pools, respectively. forty virus strains were isolated, all from mosquitoes, as follows: santa fe province: 4 gamboa group viruses from aedeomyia squamipennis, 1 strain each of st. louis encephalitis virus from culex pipiens quinquef ... | 1985 | 2863989 |
| [bluetongue: isolation and characterization of the virus and identification of vectors in northeastern argentina]. | to establish if btv was circulating in argentina, 94 bovines from the santo tomé and ituzaingó departments of corrientes province were sampled every 30-60 days during 14 months. red blood cells from those animals that showed seroconvertion with a c-elisa were processed for virus isolation by inoculation in embryonated chicken eggs and cell cultures. cells with cpe were positive by direct and indirect immunofluorescence with btv specific reagents. these samples examined by electron microscopy sho ... | 2002 | 12415897 |
| life history studies of heterophyid trematodes in the neotropical region: ascocotyle (leighia) hadra sp. n. | the life cycle of ascocotyle (leighia) hadra n. sp. was experimentally reproduced, starting from cercariae from naturally infected littoridina parchappei, collected from los ranchos stream, near mercedes city, buenos aires province, argentina. metacercariae were found encysted in the liver and mesentery of experimentally and naturally infected fishes cnesterodon decemmaculatus and jenynsia lineata. adults were obtained experimentally in chicks and mice. the natural host is unknown. the new speci ... | 1992 | 1343669 |
| [epidemiology of american trypanosomiasis in the north of corrientes province, argentina]. | the aim of this investigation was to evaluate triatomine colonization in domestic and extradomestic ecotopes, to determine triatomines infection index and to assess human prevalence of anti trypanosoma cruzi antibodies at berón de astrada and mburucuyá departments, corrientes, argentina. samplings were performed in 2007 and 2008 in randomly selected households at rural areas. diagnosis of chagas infection in volunteer residents was performed using indirect hemagglutination, indirect immunofluore ... | 2010 | 20447895 |
| occurrence of non-o157 shiga toxin-producing escherichia coli in ready-to-eat food from supermarkets in argentina. | between june 2000 and december 2001, 500 food samples were collected from supermarkets and shops selling ready-to-eat food in rosario, argentina, and examined for escherichia coli. forty-nine e. coli isolates from food samples were further characterized for virulence genes by multiplex polymerase chain reaction (pcr) targeting the stx1, stx2, stx2e, eaea, cnf1, cnf2, einv, lti, sti, and stii genes in four groups. out of 49 e. coli isolates screened by multiplex pcr, only 10 possessed shiga toxin ... | 2006 | 16943019 |