Publications by authors named "Tereza Cristina Monteiro Gurjao"
This study investigated the presence of norovirus (NoV) GI and GII in environmental samples from the northern region of Brazil. Water samples were collected monthly (November 2008/October 2010) from different sources and sewage and concentrated by the adsorption-elution method. The NoV investigation used molecular methods followed by sequencing reactions.
View Article and Find Full Text PDFNoroviruses are the major cause of non-bacterial acute gastroenteritis outbreaks in humans, with few reports about the occurrence of the norovirus GIV strain. We investigated the presence of norovirus GIV in surface water (river, bay, and stream) and untreated sewage, and we determined a positivity rate of 9.4% (9/96).
View Article and Find Full Text PDFPopulation and genetic study of Vibrio cholerae from the amazon environment confirms that the WASA-1 prophage is the main marker of the epidemic strain that circulated in the region.
Lena Líllian Canto de Sá Morais Daniel Rios Garza Edvaldo Carlos Brito Loureiro Elivam Rodrigues Vale Denise Suéllem Amorim de Sousa Santos
PLoS One
October 2014
Article Synopsis
- Vibrio cholerae, a bacterium found in various aquatic environments, includes both harmful and harmless strains, with only specific biotypes causing cholera epidemics.
- Environmental surveillance in the Brazilian Amazon from 1971 has detected various strains, particularly during the cholera epidemic from 1991 to 1996, including both non-toxigenic and toxigenic O1 strains.
- A study analyzed these V. cholerae strains over different time periods, revealing genetic diversity related to virulence and significant differences in PFGE profiles, which help distinguish between potentially epidemic strains and local variants.