scholarly journals First report of two kdr mutations L1014F/S in natural populations of Triatoma pallidipennis Stal and Triatoma picturata Usinger vectors of Chagas disease in Mexico

2019 ◽  
Vol 44 (2) ◽  
pp. 285-289
Author(s):  
Jesus Davila‐Barboza ◽  
O. Karina Villanueva‐Segura ◽  
Gustavo Ponce‐Garcia ◽  
Beatriz Lopez‐Monroy ◽  
Iram P. Rodiguez‐Sanchez ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Natural Populations ◽  
First Report

C-heterochromatin polymorphism in holocentric chromosomes of Triatoma infestans (Hemiptera: Reduviidae)

Genome ◽  
1992 ◽  
Vol 35 (6) ◽  
pp. 1068-1074 ◽  
Author(s):  
Fco Panzera ◽  
F. Alvarez ◽  
J. Sanchez-Rufas ◽  
R. Pérez ◽  
J. A. Suja ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Intraspecific Variation ◽  
Natural Populations ◽  
Chromosomal Polymorphism ◽  
Triatoma Infestans ◽  
Holocentric Chromosomes ◽  
Marked Variation ◽  
Geographical Pattern ◽  
First Report ◽  
Heterochromatin Polymorphism

This is the first report of intraspecific variation of C-bands in Heteroptera, described in natural populations of Triatoma infestans (Hemiptera: Reduviidae), the main vector of Chagas disease in Uruguay. Marked variation in number, position, and size of C-heterochromatic bands was found in the three large autosomal pairs. A geographical pattern of this chromosomal polymorphism was observed. Evolutionary importance and epidemiological relevance are discussed.Key words: Triatoma infestans, cytogenetics, C-band polymorphism, holocentric chromosomes, Chagas disease.

scholarly journals First report of Eratyrus mucronatus, Stal, 1859, (Hemiptera, Reduviidae, Triatominae), in the State of Rondônia, Brazil

2011 ◽  
Vol 44 (4) ◽  
pp. 511-512 ◽  
Author(s):  
Dionatas Ulises de Oliveira Meneguetti ◽  
Olzeno Trevisan ◽  
Renato Moreira Rosa ◽  
Luís Marcelo Aranha Camargo
Keyword(s):  
Geographical Distribution ◽  
Chagas Disease ◽  
The State ◽  
First Report ◽  
First Time

INTRODUCTION: This paper reports, for the first time, the presence of the Eratyrus mucronatus species in the State of Rondonia, Brazil. METHODS: These specimens were caught by chance in the forest and later they were collected using luminous traps. RESULTS: After finding these specimens, the number of the Triatominae genera in Rondonia rose to four, while its species rose to seven. CONCLUSIONS: Complimentary studies will be conducted in order to allow for clearer understanding the ecology of this arthropod, its possible role in transmitting Chagas' disease and its current geographical distribution.

scholarly journals Corrigenda: Peixoto SR, Rocha DS, Dale C, Galvão C (2020) Panstrongylus geniculatus (Latreille, 1811) (Hemiptera, Reduviidae, Triatominae): first record on Ilha Grande, Rio de Janeiro, razil.Check List 16 (2): 391–394. https://doi.org/10.15560/16.2.391

Check List ◽  
2020 ◽  
Vol 16 (4) ◽  
pp. 989-989
Author(s):  
Solange Peixoto ◽  
Dayse da Silva Rocha ◽  
Carolina Dale ◽  
Cleber Galvão
Keyword(s):  
Trypanosoma Cruzi ◽  
Chagas Disease ◽  
Disease Transmission ◽  
Rio De Janeiro ◽  
New Record ◽  
First Record ◽  
First Report ◽  
Panstrongylus Geniculatus

Panstrongylus geniculatus (Latreille, 1811) is the most widely distributed species in Brazil. This study presents the first report of this species collected inside a building in the “Centro de Estudos Ambientais e Desenvolvimento Sustentável”, at the Vila Dois Rios, Ilha Grande, Rio de Janeiro, Brazil. The new record is important to understand the risk of Chagas disease transmission, mainly because this species is commonly found infected with Trypanosoma cruzi (Chagas, 1909).

Trypanosoma cruzi Discrete Typing Units in Chagas disease patients from endemic and non-endemic regions of Argentina

Parasitology ◽  
2012 ◽  
Vol 139 (4) ◽  
pp. 516-521 ◽  
Author(s):  
C. I. CURA ◽  
R. H. LUCERO ◽  
M. BISIO ◽  
E. OSHIRO ◽  
L. B. FORMICHELLI ◽  
...  
Keyword(s):  
Trypanosoma Cruzi ◽  
Chagas Disease ◽  
Natural Populations ◽  
Clinical Samples ◽  
Kidney Transplant Patient ◽  
Tissue Samples ◽  
Cardiac Tissues ◽  
Taxonomical Status ◽  
Immunosuppressed Patients ◽  
History Of

SUMMARYGenetic diversity of Trypanosoma cruzi may play a role in pathogenesis of Chagas disease forms. Natural populations are classified into 6 Discrete Typing Units (DTUs) Tc I-VI with taxonomical status. This study aimed to identify T. cruzi DTUs in bloodstream and tissue samples of Argentinean patients with Chagas disease. PCR-based strategies allowed DTU identification in 256 clinical samples from 239 Argentinean patients. Tc V prevailed in blood from both asymptomatic and symptomatic cases and Tc I was more frequent in bloodstream, cardiac tissues and chagoma samples from immunosuppressed patients. Tc II and VI were identified in a minority of cases, while Tc III and Tc IV were not detected in the studied population. Interestingly, Tc I and Tc II/VI sequences were amplified from the same skin biopsy slice from a kidney transplant patient suffering Chagas disease reactivation. Further data also revealed the occurrence of mixed DTU populations in the human chronic infection. In conclusion, our findings provide evidence of the complexity of the dynamics of T. cruzi diversity in the natural history of human Chagas disease and allege the pathogenic role of DTUs I, II, V and VI in the studied population.

First report of a family outbreak of Chagas disease in French Guiana and posttreatment follow-up

2014 ◽  
Vol 28 ◽  
pp. 245-250 ◽  
Author(s):  
Denis Blanchet ◽  
Simone Frédérique Brenière ◽  
Alejandro G. Schijman ◽  
Margarita Bisio ◽  
Stéphane Simon ◽  
...  
Keyword(s):  
Chagas Disease ◽  
French Guiana ◽  
First Report ◽  
Family Outbreak

scholarly journals Hepatocyte metaplasia in experimental chagasic pancreatitis: preliminary report

2001 ◽  
Vol 34 (3) ◽  
pp. 295-297 ◽  
Author(s):  
Vitorino Modesto dos Santos ◽  
Marcus Aurelho de Lima ◽  
Marlene Cabrine-Santos ◽  
Daniela de Stefani Marquez ◽  
Eliane Lages-Silva ◽  
...  
Keyword(s):  
Trypanosoma Cruzi ◽  
Chagas Disease ◽  
Preliminary Report ◽  
Inflammatory Process ◽  
Infected Group ◽  
First Report ◽  
Regenerative Response

Beginning the study of chronic pathologic changes in pancreas of hamsters experimentally infected with Trypanosoma cruzi Vic strain, hepatocyte metaplasia was observed in one animal from infected group. This is the first report of oncocytes in Chagas' disease, which could be due to aberrant regenerative response to pancreas inflammatory process.

Long-term comparative pharmacovigilance of orally transmitted Chagas disease: first report

2017 ◽  
Vol 15 (3) ◽  
pp. 319-325 ◽  
Author(s):  
Belkisyolé Alarcón de Noya ◽  
Raiza Ruiz-Guevara ◽  
Oscar Noya ◽  
Julio Castro ◽  
John Ossenkopp ◽  
...  
Keyword(s):  
Chagas Disease ◽  
First Report

Population structure and genetic typing of Trypanosoma cruzi, the agent of Chagas disease: a multilocus enzyme electrophoresis approach

Parasitology ◽  
2000 ◽  
Vol 120 (5) ◽  
pp. 513-526 ◽  
Author(s):  
C. BARNABÉ ◽  
S. BRISSE ◽  
M. TIBAYRENC
Keyword(s):  
Trypanosoma Cruzi ◽  
Chagas Disease ◽  
Natural Populations ◽  
Enzyme Electrophoresis ◽  
Strong Linkage Disequilibrium ◽  
Multilocus Enzyme Electrophoresis ◽  
Routine Identification ◽  
Genetic Clusters ◽  
Phylogenetic Lineages ◽  
The Impact

A set of 434 Trypanosoma cruzi stocks from a wide ecogeographical range was analysed by Multilocus Enzyme Electrophoresis for 22 genetic loci. Strong linkage disequilibrium, not associated with geographical distance, and 2 main genetic clusters each considerably heterogeneous, was observed. These results support the hypotheses previously proposed that T. cruzi natural populations are composed of highly diversified genetic clones distributed into 2 main phylogenetic lineages: lineage 1, the most ubiquitous in the endemic area, was more frequently observed in sylvatic cycles, whereas lineage 2, predominant in humans and domestic cycles, in the southern part of the area surveyed, was further partitioned into 5 lesser genetic subdivisions. T. cruzi appears therefore subdivided into at least 6 ‘discrete typing units’ or DTUs (Tibayrenc, 1998a–c). We have identified various specific isoenzyme markers (‘tags’; Tibayrenc, op. cit.) suitable for the routine identification of these DTUs for epidemiological tracking purposes. We discuss the correspondence with previous classifications and with the recent recommendations of the 90th anniversary of the discovery of Chagas disease symposium, as well as the impact of T. cruzi genetic variability on this parasite's biomedical diversity.

scholarly journals The Drosophila fertility factor kl-3 is linked to the Y-chromosome of the vector of Chagas’ disease Triatoma infestans (Hemiptera: Reduviidae) and is essential for male fertility

2019 ◽  
Author(s):  
Carlos H. Martins ◽  
Rodrigo S. V. P da Silva ◽  
Thalia K. Ferreira ◽  
Rafaela Paim ◽  
Grasielle C. D. Pessoa ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Chagas Disease ◽  
Male Fertility ◽  
Triatoma Infestans ◽  
Control Group ◽  
Linked Gene ◽  
First Report ◽  
Functional Studies ◽  
Bioinformatic Tools ◽  
Sexual Determination

AbstractIn many insects, the Y chromosome plays a key role in sexual determination and male fertility. The Chagas disease vector Triatoma infestans has 22 autosomal chromosomes and a pair of XY sex chromosomes. However, the knowledge on the Y chromosome of this species, its genetic content or its biological function, is very poor. Due to repetitive DNA, Y chromosome sequences are poorly assembled in genome projects, hindering structural and functional studies on Y-linked genes. Our group has developed many of the bioinformatic tools to identify Y-linked sequences in assembled genomes. Here, we describe the identification of a γ-dynein heavy chain linked to the Y-chromosome of T. infestans. This protein is orthologous to the Drosophila melanogaster Y-linked gene kl-3. In D. melanogaster, dyneins of the Y chromosome are known as male fertility factors and their deletion causes male infertility. We performed knockdown of the kl-3 expression to ascertain its function in T. infestans. Our results showed that injection of dsKL3 reduced, significantly, the fertility of T. infestans males (p<0.01). The mean number of eggs laid by the control group was 35.64 eggs/couple while the kl-3 knockdown group was of 11.82 eggs/couple (five couples did not lay any eggs). Differences in eclosion rate was even more significant, with a hatching mean rate of 16.85±10.03 and 1.69±3.58 (p<0.001) for the control and the silenced groups respectively. Our results suggest that kl-3 maintains its functional role as essential for male fertility in T. infestans. Hence, it seems that the Y-chromosome of T. infestans has a key role in male fertility. This is the first report of a kl-3 orthologue linked to the Y chromosome of an insect species outside the diptera clade. In addition to the first report of a Y-linked gene in T. infestans with a role for male fertility, this finding is of great relevance for the study of the evolution of Y chromosomes and further studies that could lead to novel approaches in insect control.

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