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Find video protocols related to scientific articles indexed in Pubmed.
Current situation and perspectives regarding human Chagas disease in midwestern of the state of Minas Gerais, Brazil.
Mem. Inst. Oswaldo Cruz
PUBLISHED: 05-17-2014
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Recognising the importance of Chagas disease in Brazil, Bambuí set up epidemiological surveillance for Chagas disease in 1974 and was the first municipality to do so. To ascertain the current epidemiology of Chagas disease in this municipality, 1.782 blood samples from the general population were analysed; 7.7% of samples were found to be seropositive for Chagas disease. A strong positive correlation between increasing age and Chagas disease was evident in both genders, with the highest prevalence in individuals aged over 60 years. Clinically, the cardiodigestive form of Chagas disease was the most common in these samples. These data confirm the interruption of Trypanosoma cruzi transmission, in parallel with a still important residual morbidity of Chagas disease in the county, thus supporting political decisions that will prioritise epidemiological surveillance and medical treatment of Chagas disease in the coming years.
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Applicability of an optimized non-conventional flow cytometry method to detect anti-Trypanosoma cruzi immunoglobulin G for the serological diagnosis and cure assessment following chemotherapeutic treatment of Chagas disease.
J. Immunol. Methods
PUBLISHED: 03-28-2011
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One of the challenges on immunodiagnostic of Chagas disease in endemic areas has been the search for more practical and safe antigenic preparation that provides tests with higher sensitivity and specificity, with low cross-reactivity. A new approach using fixed Trypanosoma cruzi epimastigotes to detect IgG reactivity was investigated previously. In order to continue this investigation, this study aimed at optimizing the flow cytometry-based method to the diagnosis of Chagas disease patients after specific chemotherapy. To achieve our goal, serum samples from 93 subjects - 52 adults chronically infected by T. cruzi, and 41 uninfected controls were tested by flow cytometry. Secondly, serum samples from patients Treated Cured and Treated Uncured from Chagas disease were also tested to evaluate the potential of the method on assessing cure. After establishing the ideal serum dilution and cut off, 121 serum samples from patients with other endemic infections were tested to check cross-reactivity. The results showed that parasite staining with Evans blue dye eliminated debris, allowing trustworthy analysis of anti-fixed epimastigote IgG reactivity. The applicability of the method to diagnose Chagas disease was confirmed by the high sensitivity (98.1%) and specificity (100%) found. This method also contributed for post-therapeutic assessment of cure, identifying 94.1% of Treated Uncured and 83.3% of Treated Cured patients. Cross-reactivity was observed in a very low number (6.7%). On the whole, these data highly recommend the use of anti-fixed T. cruzi epimastigote IgG reactivity by flow cytometry to the diagnosis and cure monitoring of Chagas disease in endemic areas.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

How does it work?

We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

Video X seems to be unrelated to Abstract Y...

In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.