Abstract:
BACKGROUND:Triatoma dimidiata (Latreille) is a key vector complex of Trypanosoma cruzi, etiologic agent of Chagas disease, as it spans North, Central, and South America. Although morphological and genetic studies clearly indicate existence of at least five clades within the species, there has been no robust or systematic revision, or appropriate nomenclature change for species within the complex. Three of the clades (haplogroups) are distributed in Mexico, and recent evidence attests to dispersal of clades across previously "presumed" monotypic geographic regions. Evidence of niche conservatism among sister species of this complex suggests that geographic dispersal is possible for non-sympatric populations, although no information is available on the behavioural aspects of potential interclade interactions, for instance whether differentiation of chemical signaling or response to these signals could impede communication among the haplogroups. METHODS:Volatiles emitted by disturbed bugs, Brindley's (BGs), and metasternal (MGs) glands were identified using solid-phase micro-extraction (SPME) and gas chromatography coupled mass spectrometry (GC-MS). Volatile compounds emitted by BGs and MGs, and those secreted by disturbed nymphs and adults, of the three Mexican T. dimidiata haplogroups were tested for avoidance behaviour by conspecific nymphs and adults using an olfactometer. RESULTS:Triatoma dimidiata haplogroups all have three age-related alarm responses: absence of response by early stage nymphs, stage-specific response by 4-5th stage nymphs, and a shared 4-5th nymph and adult response to adult compounds. Disturbed bugs released 15 to 24 compounds depending on the haplogroup, among which were three pyrazines, the first report of these organoleptics in Triatominae. Isobutyric acid from BGs was the most abundant molecule in the response in all haplogroups, in addition to 15 (h1) to 21 (h2 and h3) MG compounds. Avoidance behaviour of disturbed bugs and volatiles emitted by BGs were haplogroup specific, while those from the MG were not. CONCLUSIONS:Discriminant and cluster analysis of BG + MG compounds indicate significant separation among the three haplogroups, while alarm response compounds were similar between h2 and h3, both distinct from h1. This latter haplogroup is ancestral phylogenetically to the other two. Our results suggest that alarm responses are a conserved behaviour in the Triatoma dimidiata complex.
journal_name
Parasit Vectorsjournal_title
Parasites & vectorsauthors
May-Concha I,Rojas JC,Cruz-López L,Ibarra-Cerdeña CN,Ramsey JMdoi
10.1186/s13071-015-0678-8subject
Has Abstractpub_date
2015-02-06 00:00:00pages
84issn
1756-3305pii
s13071-015-0678-8journal_volume
8pub_type
杂志文章abstract:BACKGROUND:Rhipicephalus sanguineus is a ubiquitous tick responsible for transmitting Ehrlichia canis and most likely Anaplasma platys to dogs, as either single or co-infections. The objective of this study was to assess the effects of either simultaneous or sequential experimental infections with E. canis and A. platy...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-3-33
更新日期:2010-04-08 00:00:00
abstract:BACKGROUND:Schistosomiasis studies in western Kenya have mainly focused on the intestinal form, with evidence of urinary schistosomiasis remaining anecdotal. Detailed disease mapping has been carried out predominantly along the shores of Lake Victoria, but there is a paucity of information on intestinal and urinary sch...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-7-125
更新日期:2014-03-25 00:00:00
abstract:BACKGROUND:Malaria mosquitoes spend a considerable part of their life in the aquatic stage, rendering them vulnerable to interventions directed to aquatic habitats. Recent successes of mosquito larval control have been reported using environmental and biological tools. Here, we report the effects of shading by plants a...
journal_title:Parasites & vectors
pub_type: 杂志文章
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-2791-y
更新日期:2018-03-20 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3376-0
更新日期:2019-03-26 00:00:00
abstract:BACKGROUND:Survival to dry season conditions of sub-Saharan savannahs is a major challenge for insects inhabiting such environments, especially regarding the desiccation threat they are exposed to. While extensive literature about insect seasonality has revealed morphologic, metabolic and physiological changes in many ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-1289-0
更新日期:2016-01-07 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3375-1
更新日期:2019-03-14 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-020-04230-y
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-2929-y
更新日期:2018-06-19 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-6-321
更新日期:2013-11-06 00:00:00
abstract:BACKGROUND:The diagnosis of cutaneous leishmaniasis (CL) might be difficult, in particular in endemic areas where different species of Leishmania can cause lesions of very similar appearance and where other skin diseases with similar clinical symptoms occur. Even today, the parasitological diagnosis of CL remains the g...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-7-420
更新日期:2014-09-04 00:00:00
abstract:BACKGROUND:Prevalence of lymphatic filariasis (LF) antigen in American Samoa was 16.5% in 1999. Seven rounds of mass drug administration (MDA) programmes between 2000 and 2006 reduced antigen prevalence to 2.3%. The most efficient methods of surveillance after MDA are not clear, but testing specific at-risk groups such...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-020-3996-4
更新日期:2020-03-12 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-017-2319-x
更新日期:2017-08-09 00:00:00
abstract::Since the implementation of Roll Back Malaria, the widespread use of insecticide-treated nets (ITNs) and indoor residual spraying (IRS) is thought to have played a major part in the decrease in mortality and morbidity achieved in malaria-endemic regions. In the past decade, resistance to major classes of insecticides ...
journal_title:Parasites & vectors
pub_type: 杂志文章,评审
doi:10.1186/s13071-020-04170-7
更新日期:2020-06-10 00:00:00
abstract:BACKGROUND:Intestinal schistosomiasis due to Schistosoma mansoni was mapped in Cameroon in the 1990s and preventive chemotherapy launched since 2005. A situation analysis conducted in 2011 revealed an increase in schistosomiasis transmission, especially in the equatorial part of the country, despite the fact that Biomp...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-2763-2
更新日期:2018-03-13 00:00:00
abstract:BACKGROUND:Elimination of lymphatic filariasis (LF) in Samoa continues to be challenging despite multiple annual mass drug campaigns aimed at stopping transmission by reducing the prevalence and density of microfilaraemia. The persistence of transmission may be partly related to the highly efficient Aedes vectors. The ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-0886-2
更新日期:2015-05-28 00:00:00
abstract:BACKGROUND:Understanding the dispersal dynamics of invasive mosquito species is fundamental to improve vector surveillance and to target control efforts. Aedes albopictus has been deemed a poor flyer as its range of active dispersal is generally assumed to be limited to a few hundred metres, while laboratory studies su...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3837-5
更新日期:2019-12-12 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
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更新日期:2020-02-11 00:00:00
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journal_title:Parasites & vectors
pub_type: 临床试验,杂志文章
doi:10.1186/s13071-018-3224-7
更新日期:2018-12-20 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-018-3105-0
更新日期:2018-09-29 00:00:00
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journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-015-0985-0
更新日期:2015-07-16 00:00:00
abstract:BACKGROUND:Leishmania parasites cause severe human diseases known as leishmaniasis. These eukaryotic microorganisms possess an atypical chromosomal architecture and the regulation of gene expression occurs almost exclusively at post-transcriptional levels. Accordingly, sequencing of the genome of Leishmania major, and ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-016-1329-4
更新日期:2016-02-08 00:00:00
abstract:BACKGROUND:The trypanosome diversity of the Brush-tailed Bettong (Bettongia penicillata), known locally as the woylie, has been further investigated. At a species level, woylies are critically endangered and have declined by 90% since 1999. The predation of individuals made more vulnerable by disease is thought to be t...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-6-121
更新日期:2013-04-26 00:00:00
abstract:BACKGROUND:Schistosomiasis primarily affects poor and neglected communities due to their lack of safe water and sanitation facilities. In an effort to improve intervention strategies, the present study investigated the association of socio-demographic characteristics of women with their existing knowledge, perceptions ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3668-4
更新日期:2019-09-23 00:00:00
abstract:BACKGROUND:A cytogenetic analysis of the new local triploid population of the caryophyllidean tapeworm Atractolytocestus huronensis, a unique parthenogenetic species with the ability to colonise new regions, was performed to understand the inner structure of its chromosome complement. METHODS:A karyotype analysis was ...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3420-0
更新日期:2019-04-11 00:00:00
abstract:BACKGROUND:Thymidylate synthase is a housekeeping gene, designated ancient due to its role in DNA synthesis and ubiquitous phyletic distribution. The genomic sequences were characterized coding for thymidylate synthase in two species of the genus Trichinella, an encapsulating T. spiralis and a non-encapsulating T. pseu...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/1756-3305-7-175
更新日期:2014-04-09 00:00:00
abstract:BACKGROUND:Epidemics of dengue, chikungunya and Zika are a growing threat to areas where Aedes aegypti are present. The efficacy of chemical control of Ae. aegypti is threatened by the increasing frequency of insecticide resistance. The objective of this study was to determine the susceptibility status as well as the b...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-019-3739-6
更新日期:2019-10-22 00:00:00
abstract:BACKGROUND:Taenia ovis is a tapeworm that is mainly transmitted between dogs and sheep. Although T. ovis infection is not a public health issue, it causes a great financial loss due to condemnation of carcasses. The first outbreak of T. ovis infection in China occurred in 2015. Reassessment of adverse effects of T. ov...
journal_title:Parasites & vectors
pub_type: 信件
doi:10.1186/s13071-016-1700-5
更新日期:2016-07-26 00:00:00
abstract:BACKGROUND:Th1, Th2, Th17, Treg and Tfh cells play important roles in schistosomiasis. Th9 cells secrete IL-9 as a signature cytokine and contribute to several classes of inflammatory disease. However, the effects of Th9 cells in schistosomiasis are unknown. We aimed to explore the dynamic changes and potential roles o...
journal_title:Parasites & vectors
pub_type: 杂志文章
doi:10.1186/s13071-017-2242-1
更新日期:2017-06-24 00:00:00