| lysotypes and plasmidial profile of salmonella serovar typhimurium isolated from children with enteric processes in the cities of rio de janeiro, rj, and salvador, ba - brazil. | the lysotypes, plasmidial profiles, and profiles of resistance to antimicrobial agents were determined in 111 salmonella typhimurium strains isolated from feces and blood of children treated in rio de janeiro and in salvador. six distinct lysotypes (19, 41, 97, 105, 120 and 193) were recognized, with a predominance of lysotype 193 (59.7%) in rio de janeiro and of phage type 105 (38.4) in salvador. approximately 86.7% of the lysotype 193 strains presented multiple resistance to more than six anti ... | 1995 | 8599057 |
| [genetic analysis of lactose-fermenting salmonella typhimurium isolated in rio de janeiro]. | lactose fermenting salmonella typhimurium are endemic in são paulo, but not in rio de janeiro two isolations are described from the latter city. these rio de janeiro strains have a plasmid of 7.4 megadaltons. these plasmids were not auto-transferable, were thermostable and were not eliminated by acridine orange. one of these strains arose from a plasmid that had the lactose operon repressed, leading us to speculate about the evolution of the lactose fermenting character in brazilian salmonella. | 1989 | 2700499 |
| genotoxicity of polycyclic aromatic hydrocarbons and nitro-derived in respirable airborne particulate matter collected from urban areas of rio de janeiro (brazil). | air pollution toxic effects are mainly attributed to small inhalable particulates with an aerodynamic diameter of less than 2.5 µ m (pm 2.5). our objective was to investigate mutagenic and clastogenic activity in pm samples collected in rio de janeiro. samples were collected using a high-volume sampler at three sites: with low traffic and (2) and (3) with a heavy traffic. six polycyclic aromatic hydrocarbons (pahs) were quantified by gas chromatography/mass spectrometry (gc/ms). salmonella typhi ... | 2013 | 23738331 |
| prediction of health risk due to polycyclic aromatic hydrocarbons present in urban air in rio de janeiro, brazil. | risk assessment can provide a comprehensive estimate of potential effects of contaminants under specific, well-defined, and well-described circumstances, providing quantitative relationships between exposure and effects to identify and to define areas of concern. we investigated the mutagenic activity of particulate matter in air samples collected from three sites in rio de janeiro city. samples were collected using a high-volume sampler at avenida brasil, at campus of universidade do estado do ... | 2013 | 23479151 |
| contamination of carcasses and utensils in small swine slaughterhouses by salmonella in the northwestern region of the state of rio de janeiro, brazil. | salmonella is a major foodborne pathogen that constantly threatens food safety in developed countries and underdeveloped countries such as brazil, where it is responsible for 38% of notified cases of foodborne illness. swine are one of the main meat-producing species that may asymptomatically carry salmonella, periodically shedding the bacteria through feces. the state of rio de janeiro is not a major producer of swine meat, but small slaughterhouses are operational and produce meat for consumpt ... | 2017 | 28585863 |