| silent circulation of st. louis encephalitis virus prior to an encephalitis outbreak in cordoba, argentina (2005). | st. louis encephalitis virus is a complex zoonoses. in 2005, 47 laboratory-confirmed and probable clinical cases of slev infection were reported in córdoba, argentina. although the causes of 2005 outbreak remain unknown, they might be related not only to virological factors, but also to ecological and environmental conditions. we hypothesized that one of the factors for sle reemergence in córdoba, argentina, was the introduction of a new slev genotype (slev genotype iii), with no previous activi ... | 2012 | 22303490 |
| vertical transmission of st. louis encephalitis virus in culex quinquefasciatus (diptera: culicidae) in córdoba, argentina. | arbovirus vector transmission is interrupted when vector abundance decreases or disappears in temperate regions during the winter season. although the primary overwintering mechanism for many arboviruses in nature remains unknown, vertical transmission is one potential mechanism. vertical transmission functions as an overwintering mechanism for st. louis encephalitis virus (slev) in temperate areas of argentina, where slev is endemic. the aim of this project was to detect vertical transmission o ... | 2010 | 20426683 |
| risk factors associated with st. louis encephalitis seroprevalence in two populations from córdoba, argentina. | st. louis encephalitis virus (slev) is endemic in argentina. the first outbreak was recorded in córdoba during the late summer of 2005. this study analyzes the association between social and demographic factors and other variables related to exposure to mosquitoes with slev infection in 264 individuals who attended two health centers in the city of córdoba during the period december 2004-january 2005. multiple logistic regression models were used to estimate the risk coefficients. the seropreval ... | 2007 | 17915268 |
| age-related seroprevalence study for st. louis encephalitis in a population from cordoba, argentina. | a serological screening was performed in 615 individuals aged 0-87 years, living in the city of cordoba, argentina to study the relationship between antibody prevalence for the sle virus and age. a 13.98% prevalence of neutralizing antibodies was obtained and its relation to age was significantly high (p = 0.045). the highest seroprevalence was noted on individuals over 60 years old (>20%), whereas no subject under 10 was seropositive for this virus. our results confirm that the agent is endemic ... | 2002 | 12048540 |
| distribution of mosquitoes in relation to urban landscape characteristics. | the current global increase in prevalence of vector borne diseases, as well as an expansion of tropical infections to more temperate zones, justifies further studies on vector populations. urban areas may favour viral transmission to humans through close contacts between the vectors and the vertebrate hosts, and also affecting mosquito populations by offering larval habitat, refuges and adequate microclimates to survive the winter. this work analyses the spatial distribution of potential vector ... | 2010 | 19413916 |
| comparison of argentinean saint louis encephalitis virus non-epidemic and epidemic strain infections in an avian model. | st. louis encephalitis virus (slev, flavivirus, flaviviridae) is an emerging mosquito-borne pathogen in south america, with human slev encephalitis cases reported in argentina and brazil. genotype iii strains of slev were isolated from culex quinquefasciatus mosquitoes in cordoba, argentina in 2005, during the largest slev outbreak ever reported in south america. the present study tested the hypothesis that the recent, epidemic slev strain exhibits greater virulence in birds as compared with a n ... | 2011 | 21629729 |
| human outbreak of st. louis encephalitis detected in argentina, 2005. | an outbreak of flavivirus encephalitis occurred in 2005 in córdoba province, argentina. | 2008 | 18249032 |
| transmission of endemic st louis encephalitis virus strains by local culex quinquefasciatus populations in cordoba, argentina. | st louis encephalitis virus (slev) is a re-emerging human pathogen widely distributed in the american continent. although it is not fully understood, the slev transmission network may involve culex quinquefasciatus mosquitoes as vectors and columbidae species as hosts. | 2013 | 23474474 |
| mapping environmental susceptibility to saint louis encephalitis virus, based on a decision tree model of remotelysensed data. | in response to the first human outbreak (january may 2005) of saint louis encephalitis (sle) virus in córdoba province, argentina, we developed an environmental sle virus risk map for the capital, i.e. córdoba city. the aim was to provide a map capable of detecting macro-environmental factors associated with the spatial distribution of sle cases, based on remotely sensed data and a geographical information system. vegetation, soil brightness, humidity status, distances to water-bodies and areas ... | 2011 | 22109866 |