keyword
MENU ▼
Read by QxMD icon Read
search

Rhodnius

keyword
https://www.readbyqxmd.com/read/27903288/untangling-the-transmission-dynamics-of-primary-and-secondary-vectors-of-trypanosoma-cruzi-in-colombia-parasite-infection-feeding-sources-and-discrete-typing-units
#1
Carolina Hernández, Camilo Salazar, Helena Brochero, Aníbal Teherán, Luz Stella Buitrago, Mauricio Vera, Hugo Soto, Zulibeth Florez-Rivadeneira, Sussane Ardila, Gabriel Parra-Henao, Juan David Ramírez
BACKGROUND: Trypanosoma cruzi is the causative agent of Chagas disease. Due to its genetic diversity has been classified into six Discrete Typing Units (DTUs) in association with transmission cycles. In Colombia, natural T. cruzi infection has been detected in 15 triatomine species. There is scarce information regarding the infection rates, DTUs and feeding preferences of secondary vectors. Therefore, the aim of this study was to determine T. cruzi infection rates, parasite DTU, ecotopes, insect stages, geographical location and bug feeding preferences across six different triatomine species...
December 1, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27890693/developmental-study-of-the-proboscis-extension-response-to-heat-in-rhodnius-prolixus-along-the-life-cycle
#2
Carole Labrousse, Claudio R Lazzari, Nadine Fresquet
Triatominae are blood-sucking insects that localise their hosts using a range of sensory signals to find food, and among them, the heat emited by the hosts. Heat is one of the main short-range cues in vertebrate hosts, able to trigger alone the Proboscis Extension Response (PER) that precedes the bite. Previous studies demonstrated that heat responsiveness of fifth-instar nymphs is maximum to moderate temperatures (30-35°C) compatible with those of their vertebrate host's body surface. This study investigated whether this thermal preference for biting is maintained along the life cycle of R...
November 24, 2016: Journal of Insect Physiology
https://www.readbyqxmd.com/read/27889871/genetic-relationships-and-spatial-genetic-structure-among-populations-of-rhodnius-prolixus-hemiptera-reduviidae-in-colombia-and-venezuela-based-on-mitochondrial-cytochrome-b-sequences
#3
K P Luna-Marín, V M Angulo-Silva, J Hernández-Torres, M Ruiz-García
One hundred twenty Rhodnius prolixus (Stal) (Hemiptera: Reduviidae) specimens from 6 Colombian Departments and 1 Venezuelan State had 594-bp of the mitochondrial cytochrome-b gene sequenced to improve the understanding of evolutionary processes that shape the main vector of Chagas disease. The levels of genetic diversity for this species were low-medium with reference to other bugs. The genetic heterogeneity among the populations was very limited which means there has been extensive gene flow and/or very recent split processes...
November 26, 2016: Neotropical Entomology
https://www.readbyqxmd.com/read/27878214/lethal-and-sublethal-effects-of-essential-oil-of-lippia-sidoides-verbenaceae-and-monoterpenes-on-chagas-disease-vector-rhodnius-prolixus
#4
Marcela B Figueiredo, Geovany A Gomes, Jayme M Santangelo, Emerson G Pontes, Patricia Azambuja, Elói S Garcia, Mário G de Carvalho
The aim of this study was to identify the composition of the essential oil from leaves of Lippia sidoides (EOLS), a typical shrub commonly found in the dry northeast of Brazil, popularly known as "alecrim-pimenta". Additionally, we investigated the nymphicidal, ovicidal, phagoinhibitory and excretion effects of EOLS, its major constituent thymol and its isomer carvacrol, on fourth instar nymphs and eggs of Rhodnius prolixus, the Chagas' disease vector. The nymphicidal and ovicidal activity of thymol, carvacrol, and EOLS was assessed by tests using impregnated Petri dishes...
November 21, 2016: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/27866813/rhodnius-prolixus-from-physiology-by-wigglesworth-to-recent-studies-of-immune-system-modulation-by-trypanosoma-cruzi-and-trypanosoma-rangeli
#5
REVIEW
P Azambuja, E S Garcia, P J Waniek, C S Vieira, M B Figueiredo, M S Gonzalez, C B Mello, D P Castro, N A Ratcliffe
This review is dedicated to the memory of Professor Sir Vincent B. Wigglesworth (VW) in recognition of his many pioneering contributions to insect physiology which, even today, form the basis of modern-day research in this field. Insects not only make vital contributions to our everyday lives by their roles in pollination, balancing eco-systems and provision of honey and silk products, but they are also outstanding models for studying the pathogenicity of microorganisms and the functioning of innate immunity in humans...
November 17, 2016: Journal of Insect Physiology
https://www.readbyqxmd.com/read/27865772/kissing-bugs-can-generalize-and-discriminate-between-different-bitter-compounds
#6
Yamila Asparch, Gina Pontes, Santiago Masagué, Sebastian Minoli, Romina B Barrozo
Animals make use of contact chemoreception structures to examine the quality of potential food sources. During this evaluation they can detect nutritious compounds that promote feeding and recognize toxins that trigger evasive behaviors. Although animals can easily distinguish between stimuli of different gustatory qualities (bitter, salty, sweet, etc.), their ability to discriminate between compounds of the same quality may be limited. Numerous plants produce alkaloids, compounds that elicit aversive behaviors in phytophagous insects and almost uniformly evoke a bitter taste for man...
November 16, 2016: Journal of Physiology, Paris
https://www.readbyqxmd.com/read/27863520/modeling-the-effects-of-palm-house-proximity-on-the-theoretical-risk-of-chagas-disease-transmission-in-a-rural-locality-of-the-orinoco-basin-colombia
#7
Diana Erazo, Juan Cordovez
BACKGROUND: Chagas disease is a major public health concern in Latin America and it is transmitted by insects of the subfamily Triatominae, including Rhodnius spp. Since palm trees are ubiquitous in Colombia and a habitat for Rhodnius spp., the presence of palms near villages could increase contact rates between vectors and humans. Therefore, knowing whether a relationship exists between the proximity of palms to villages and the abundance and distribution of vectors therein, may be critical for Chagas disease prevention programs...
November 18, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27855217/screening-of-fungi-for-biological-control-of-a-triatomine-vector-of-chagas-disease-temperature-and-trypanosome-infection-as-factors
#8
Aline R M Garcia, Adriana de Paula Rocha, Camila C Moreira, Silma L Rocha, Alessandra A Guarneri, Simon L Elliot
Entomopathogenic fungi have been investigated as an alternative tool for controlling various insects, including triatomine vectors of the protozoan Trypanosoma cruzi, the etiological agent of Chagas disease. Here we tested the pathogenicity and virulence of ten isolates of the fungi Metarhizium spp. and Beauveria bassiana against Rhodnius prolixus and found all of the isolates to be virulent. We used two isolates (URPE-11 Metarhizium anisopliae and ENT-1 Beauveria bassiana) for further screening based on their prolific sporulation in vitro (an important property of fungal biopesticides)...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27833419/description-of-rhodnius-marabaensis-sp-n-hemiptera-reduviidae-triatominae-from-par%C3%A3-state-brazil
#9
Eder Dos Santos Souza, Noé Carlos Barbosa Von Atzingen, Maria Betânia Furtado, Jader de Oliveira, Juliana Damieli Nascimento, Daniel Pagotto Vendrami, Sueli Gardim, João Aristeu da Rosa
Rhodnius marabaensissp. n. was collected on 12 May 2014 in the Murumurú Environmental Reserve in the city of Marabá, Pará State, Brazil. This study was based on previous consultation of morphological descriptions of 19 Rhodnius species and compared to the identification key for the genus Rhodnius. The examination included specimens from 18 Rhodnius species held in the Brazilian National and International Triatomine Taxonomy Reference Laboratory in the Oswaldo Cruz Institute in Rio de Janeiro, Brazil. The morphological characteristics of the head, thorax, abdomen, genitalia, and eggs have been determined...
2016: ZooKeys
https://www.readbyqxmd.com/read/27830050/the-presence-of-the-ancestral-insect-telomeric-motif-in-kissing-bugs-triatominae-rules-out-the-hypothesis-of-its-loss-in-evolutionarily-advanced-heteroptera-cimicomorpha
#10
Sebastián Pita, Francisco Panzera, Pablo Mora, Jesús Vela, Teresa Palomeque, Pedro Lorite
Next-generation sequencing data analysis on Triatoma infestans Klug, 1834 (Heteroptera, Cimicomorpha, Reduviidae) revealed the presence of the ancestral insect (TTAGG)n telomeric motif in its genome. Fluorescence in situ hybridization confirms that chromosomes bear this telomeric sequence in their chromosomal ends. Furthermore, motif amount estimation was about 0.03% of the total genome, so that the average telomere length in each chromosomal end is almost 18 kb long. We also detected the presence of (TTAGG)n telomeric repeat in mitotic and meiotic chromosomes in other three species of Triatominae: Triatoma dimidiata Latreille, 1811, Dipetalogaster maxima Uhler, 1894, and Rhodnius prolixus Ståhl, 1859...
2016: Comparative Cytogenetics
https://www.readbyqxmd.com/read/27822479/triflumuron-effects-on-the-physiology-and-reproduction-of-rhodnius-prolixus-adult-females
#11
Bianca Santos Henriques, Fernando Ariel Genta, Cícero Brasileiro Mello, Lucas Rangel Silva, Thaís Franco Codogno, Alyne F R Oliveira, Lourena Pinheiro Marinho, Denise Valle, José Bento Pereira Lima, Denise Feder, Marcelo Salabert Gonzalez, Patricia Azambuja
We evaluated the efficacy of the growth regulator triflumuron (TFM) in inducing mortality and disrupting both oviposition and egg hatching in Rhodnius prolixus adult females. TFM was administered via feeding, topically or by continuous contact with impregnated surfaces. Feeding resulted in mild biological effects compared with topical and impregnated surfaces. One day after treatment, the highest mortality levels were observed with topical surface and 30 days later both topical and impregnated surfaces induced higher mortalities than feeding...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27792774/under-expression-of-chemosensory-genes-in-domiciliary-bugs-of-the-chagas-disease-vector-triatoma-brasiliensis
#12
Axelle Marchant, Florence Mougel, Emmanuelle Jacquin-Joly, Jane Costa, Carlos Eduardo Almeida, Myriam Harry
BACKGROUND: In Latin America, the bloodsucking bugs Triatominae are vectors of Trypanosoma cruzi, the parasite that causes Chagas disease. Chemical elimination programs have been launched to control Chagas disease vectors. However, the disease persists because native vectors from sylvatic habitats are able to (re)colonize houses-a process called domiciliation. Triatoma brasiliensis is one example. Because the chemosensory system allows insects to interact with their environment and plays a key role in insect adaption, we conducted a descriptive and comparative study of the chemosensory transcriptome of T...
October 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27706434/-strategy-for-determining-a-baseline-in-areas-of-vector-interruption-for-chagas-disease
#13
Diego Montenegro, Mauricio Vera, Liliana Zuleta, Violeta Llanos, Angela Junqueira
Objectives Present a strategy to determine the baseline in endemic areas in the process of vector interruption for Chagas disease (CHD). Methods A social and environmental questionnaire and an entomological survey evaluated the physical conditions of dwellings, the inhabitants' knowledge of CHD, the entomological triatomine indicators and the statistical relationship among these variables. Results Colonization and natural infection with Trypanosoma cruzi exist in Rhodnius prolixus, the principal vector of CHD in Colombia...
June 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/27706376/on-triatomines-cockroaches-and-haemolymphagy-under-laboratory-conditions-new-discoveries
#14
Pamela Durán, Edda Siñani, Stéphanie Depickère
For a long time, haematophagy was considered an obligate condition for triatomines (Hemiptera: Reduviidae) to complete their life cycle. Today, the ability to use haemolymphagy is suggested to represent an important survival strategy for some species, especially those in genus Belminus. As Eratyrus mucronatus and Triatoma boliviana are found with cockroaches in the Blaberinae subfamily in Bolivia, their developmental cycle from egg to adult under a "cockroach diet" was studied. The results suggested that having only cockroach haemolymph as a food source compromised development cycle completion in both species...
October 2016: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/27697616/lipid-metabolism-in-rhodnius-prolixus-lessons-from-the-genome
#15
David Majerowicz, Gustavo M Calderón-Fernández, Michele Alves-Bezerra, Iron F De Paula, Lívia S Cardoso, M Patricia Juárez, Georgia C Atella, Katia C Gondim
The kissing bug Rhodnius prolixus is both an important vector of Chagas' disease and an interesting model for investigation into the field of physiology, including lipid metabolism. The publication of this insect genome will bring a huge amount of new molecular biology data to be used in future experiments. Although this work represents a promising scenario, a preliminary analysis of the sequence data is necessary to identify and annotate the genes involved in lipid metabolism. Here, we used bioinformatics tools and gene expression analysis to explore genes from different genes families and pathways, including genes for fat breakdown, as lipases and phospholipases, and enzymes from β-oxidation, fatty acid metabolism, and acyl-CoA and glycerolipid synthesis...
September 30, 2016: Gene
https://www.readbyqxmd.com/read/27688270/chromosome-painting-in-triatomine-insects-reveals-shared-sequences-between-x-chromosomes-and-autosomes
#16
Sebastián Pita, Francisco Panzera, Antonio Sánchez, Teresa Palomeque, Pedro Lorite
In order to provide a broad picture on the origin and evolution of holocentric X chromosomes in heteropteran species, we prepared a sex chromosome painting probe by microdissection of the X1 and X2 chromosomes from a kissing bug Mepraia spinolai (Hemiptera: Reduviidae: Triatominae). Fluorescence in situ hybridization on four species of the Triatomini having different amounts of autosomal heterochromatin and sex chromosome systems show that the Xs probe hybridizes on the euchromatin, located both on autosomes and X chromosomes...
September 29, 2016: Journal of Medical Entomology
https://www.readbyqxmd.com/read/27645782/nucleolar-persistence-peculiar-characteristic-of-spermatogenesis-of-the-vectors-of-chagas-disease-hemiptera-triatominae
#17
Fernanda Fernandez Madeira, Kelly Cristine Borsatto, Anna Claudia Campaner Lima, Amanda Ravazi, Jader de Oliveira, João Aristeu da Rosa, Maria Tercília Vilela de Azeredo-Oliveira, Kaio Cesar Chaboli Alevi
All species of triatomines are considered potential vectors of Chagas disease and the reproductive biology of these bugs has been studied by different approaches. In 1999, nucleolar persistence during meiosis was observed in the subfamily for the first time. Recently, it has been observed that all species within the genus Rhodnius exhibit the same phenomenon, suggesting that it may be a synapomorphy of the triatomines. Thus, this article aims to analyze the nucleolar behavior during spermatogenesis of 59 triatomine species...
November 2, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27598628/behavioral-fever-response-in-rhodnius-prolixus-reduviidae-triatominae-to-intracoelomic-inoculation-of-trypanosoma-cruzi
#18
Gloria Hinestroza, Mario Iván Ortiz, Jorge Molina
INTRODUCTION: Behavioral fever is a response to infections with microorganisms observed in some poikilothermic animals. Rhodnius prolixus is involved in the transmission of two parasites: Trypanosoma cruzi (pathogenic for humans and transmitted in feces) and Trypanosoma rangeli (non-pathogenic for humans, pathogenic for Rhodnius and transmitted by the bite of an infected individual). Only T. rangeli is found in the hemolymph of Rhodnius as it travels to the salivary glands. METHODS: To study vector-parasite interactions, we evaluated possible behavioral fever responses of R...
July 2016: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/27574112/glycogen-synthase-kinase-3-is-involved-in-glycogen-metabolism-control-and-embryogenesis-of-rhodnius-prolixus
#19
Flávia B Mury, Magda D Lugon, Rodrigo Nunes DA Fonseca, Jose R Silva, Mateus Berni, Helena M Araujo, Marcio Ribeiro Fontenele, Leonardo Araujo DE Abreu, Marílvia Dansa, Glória Braz, Hatisaburo Masuda, Carlos Logullo
Rhodnius prolixus is a blood-feeding insect that transmits Trypanosoma cruzi and Trypanosoma rangeli to vertebrate hosts. Rhodnius prolixus is also a classical model in insect physiology, and the recent availability of R. prolixus genome has opened new avenues on triatomine research. Glycogen synthase kinase 3 (GSK-3) is classically described as a key enzyme involved in glycogen metabolism, also acting as a downstream component of the Wnt pathway during embryogenesis. GSK-3 has been shown to be highly conserved among several organisms, mainly in the catalytic domain region...
October 2016: Parasitology
https://www.readbyqxmd.com/read/27536213/identification-and-characterization-of-the-corazonin-receptor-and-possible-physiological-roles-of-the-corazonin-signaling-pathway-in-rhodnius-prolixus
#20
Zina Hamoudi, Angela B Lange, Ian Orchard
Neuropeptides control many physiological and endocrinological processes in animals, acting as neuroactive chemicals within the central and peripheral nervous systems. Corazonin (CRZ) is one such neuropeptide that has a variety of physiological roles associated with control of heartbeat, ecdysis behavior initiation, and cuticle coloration. These physiological effects are mediated by the CRZ receptor (CRZR). In order to understand the role of the CRZ-signaling pathway in Rhodnius prolixus, the cDNA sequence encoding the Rhopr-CRZR was isolated and cloned revealing two splice variants (Rhopr-CRZR-α and β)...
2016: Frontiers in Neuroscience
keyword
keyword
98643
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"