keyword
MENU ▼
Read by QxMD icon Read
search

host-parasite

keyword
https://www.readbyqxmd.com/read/28107057/living-on-the-edge-parasite-prevalence-changes-dramatically-across-a-range-edge-in-an-invasive-gecko
#1
Andrew Coates, Louise K Barnett, Conrad Hoskin, Ben L Phillips
Species interactions can determine range limits, and parasitism is the most intimate of such interactions. Intriguingly, the very conditions on range edges likely change host-parasite dynamics in nontrivial ways. Range edges are often associated with clines in host density and with environmental transitions, both of which may affect parasite transmission. On advancing range edges, founder events and fitness/dispersal costs of parasitism may also cause parasites to be lost on range edges. Here we examine the prevalence of three species of parasite across the range edge of an invasive gecko, Hemidactylus frenatus, in northeastern Australia...
February 2017: American Naturalist
https://www.readbyqxmd.com/read/28107054/helping-relatives-survive-and-reproduce-inclusive-fitness-and-reproductive-value-in-brood-parasitism
#2
Malte Andersson
Costly help can raise a relative's reproduction, survival, and reproductive value and increase the inclusive fitness of the donor of help. Donor fitness is explored here in conspecific brood parasitism. In this alternative reproductive tactic, some females, "parasites," lay eggs in nests of other females of the same species, "hosts," suppliers of help that alone take care of the offspring. Modeling shows that hosts can gain inclusive fitness if parasitized by relatives whose reproduction or survival is thereby increased...
February 2017: American Naturalist
https://www.readbyqxmd.com/read/28104352/comparative-proteomic-analysis-of-two-pathogenic-tritrichomonas-foetus-genotypes-there-is-more-to-the-proteome-than-meets-the-eye
#3
Leah J Stroud, Jan Šlapeta, Matthew P Padula, Dylan Druery, George Tsiotsioras, Jens R Coorssen, Colin M Stack
Certain clinical isolates of Tritrichomonas foetus infect the urogenital tract of cattle while others infect the gastrointestinal tract of cats. Previous studies have identified subtle genetic differences between these isolates with the term "genotype" adopted to reflect host origin. The aim of this work was to seek evidence of host-specific adaptation and to clarify the relationship between T. foetus genotypes. To do this we characterised the proteomes of both genotypes using two-dimensional gel electrophoresis (2DE) coupled with LC-MS/MS...
January 16, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28103801/parasite-infection-of-public-databases-a-data-mining-approach-to-identify-apicomplexan-contaminations-in-animal-genome-and-transcriptome-assemblies
#4
Janus Borner, Thorsten Burmester
BACKGROUND: Contaminations from various exogenous sources are a common problem in next-generation sequencing. Another possible source of contaminating DNA are endogenous parasites. On the one hand, undiscovered contaminations of animal sequence assemblies may lead to erroneous interpretation of data; on the other hand, when identified, parasite-derived sequences may provide a valuable source of information. RESULTS: Here we show that sequences deriving from apicomplexan parasites can be found in many animal genome and transcriptome projects, which in most cases derived from an infection of the sequenced host specimen...
January 19, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28095927/small-alteration-big-impacts-effects-of-small-scale-riparian-forest-management-on-host-parasite-dynamics-in-streams
#5
C Lagrue, A A Besson, A Lecerf
Environmental changes and ecological disturbances can have large and unpredictable effects on parasite dynamics. Increasing human impacts on freshwater ecosystems through land use may thus modify the distribution and abundance of parasites and have cascading effects on host populations. Here we tested the effects of small-scale riparian forest management on the nematode Cystidicoloides ephemeridarum and its insect intermediate host Ephemera danica in forested streams. We assessed the impacts of harvesting riparian trees on parasite prevalence and abundance concomitantly with host densities...
January 18, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28091914/altered-liver-proteoglycan-glycosaminoglycan-structure-as-a-manifestation-of-extracellular-matrix-remodeling-upon-bcg-induced-granulomatosis-in-mice
#6
L B Kim, V A Shkurupy, A N Putyatina
Experimental BCG-induced granulomatosis in mice was used to study changes in the dynamics of individual liver proteoglycan components reflecting phasic extracellular matrix remodeling, determined by the host-parasite interaction and associated with granuloma development. In the early BCG-granulomatosis period, the increase in individual proteoglycan components promotes granuloma formation, providing conditions for mycobacteria adhesion to host cells, migration of phagocytic cells from circulation, and cell-cell interaction leading to granuloma development and fibrosis...
January 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28076419/stability-of-a-coevolving-host-parasite-system-peaks-at-intermediate-productivity
#7
Xin-Feng Zhao, Yi-Qi Hao, Quan-Guo Zhang
Habitat productivity may affect the stability of consumer-resource systems, through both ecological and evolutionary mechanisms. We hypothesize that coevolving consumer-resource systems show more stable dynamics at intermediate resource availability, while very low-level resource supply cannot support sufficiently large populations of resource and consumer species to avoid stochastic extinction, and extremely resource-rich environments may promote escalatory arms-race-like coevolution that can cause strong fluctuations in species abundance and even extinction of one or both trophic levels...
2017: PloS One
https://www.readbyqxmd.com/read/28076373/larvae-and-nests-of-aculeate-hymenoptera-hymenoptera-aculeata-nesting-in-reed-galls-induced-by-lipara-spp-diptera-chloropidae-with-a-review-of-species-recorded-part-ii
#8
Alena Astapenková, Petr Heneberg, Petr Bogusch
The ability of aculeate Hymenoptera to utilize wetlands is poorly understood, and descriptions of their nests and developmental stages are largely absent. Here we present results based on our survey of hymenopterans using galls induced by Lipara spp. flies on common reed Phragmites australis in the years 2015-2016. We studied 20,704 galls, of which 9,446 were longitudinally cut and the brood from them reared in the laboratory, while the remaining 11,258 galls reared in rearing bags also in laboratory conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28073389/the-distribution-of-echinostome-parasites-in-ponds-and-implications-for-larval-anuran-survival
#9
John A Marino, Manja P Holland, Earl E Werner
Parasites can influence host population dynamics, community composition and evolution. Prediction of these effects, however, requires an understanding of the influence of ecological context on parasite distributions and the consequences of infection for host fitness. We address these issues with an amphibian - trematode (Digenea: Echinostomatidae) host-parasite system. We initially performed a field survey of trematode infection in first (snail) and second (larval green frog, Rana clamitans) intermediate hosts over 5 years across a landscape of 23 ponds in southeastern Michigan...
January 11, 2017: Parasitology
https://www.readbyqxmd.com/read/28073385/the-cestode-parasite-schistocephalus-pungitii-castrator-or-nutrient-thief-of-ninespine-stickleback-fish
#10
David C Heins
In this investigation, the host-parasite relationship of ninespine stickleback fish Pungitius pungitius and the cestode parasite Schistocephalus pungitii was studied using samples from Dog Bone Lake, Kenai Peninsula, Alaska, to test the hypothesis that S. pungitii is a castrator of ninespine stickleback. Infected, adult females of all sizes (ages) were capable of producing clutches of eggs. S. pungitii had a negative effect on the ability of host females to produce a clutch, which was related to increasing parasite:host mass ratio (parasite index, PI)...
January 11, 2017: Parasitology
https://www.readbyqxmd.com/read/28073381/immediate-and-lag-effects-of-pesticide-exposure-on-parasite-resistance-in-larval-amphibians
#11
Katherine M Pochini, Jason T Hoverman
Across host-parasite systems, there is evidence that pesticide exposure increases parasite loads and mortality following infection. However, whether these effects are driven by reductions in host resistance to infection or slower rates of parasite clearance is often unclear. Using controlled laboratory experiments, we examined the ability of larval northern leopard frogs (Lithobates pipiens) and American toads (Anaxyrus americanus) to resist and clear trematode (Echinoparyphium sp.) infections following exposure to the insecticide carbaryl...
January 11, 2017: Parasitology
https://www.readbyqxmd.com/read/28069074/a-next-generation-microarray-further-reveals-stage-enriched-gene-expression-pattern-in-the-blood-fluke-schistosoma-japonicum
#12
Pengfei Cai, Shuai Liu, Xianyu Piao, Nan Hou, Hong You, Donald P McManus, Qijun Chen
BACKGROUND: Schistosomiasis is caused by infection with blood flukes of the genus Schistosoma, and ranks, in terms of disability-adjusted life years (DALYs), as the third most important neglected tropical disease. Schistosomes have several discrete life stages involving dramatic morphological changes during their development, which require subtle gene expression modulations to complete the complex life-cycle. RESULTS: In the current study, we employed a second generation schistosome DNA chip printed with the most comprehensive probe array for studying the Schistosoma japonicum transcriptome, to explore stage-associated gene expression in different developmental phases of S...
January 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28062289/evaluation-of-p2x7-receptor-expression-in-peripheral-lymphocytes-and-immune-profile-from-patients-with-indeterminate-form-of-chagas-disease
#13
Viviane do Carmo Gonçalves Souza, Joabel Tonellotto Dos Santos, Fernanda Licker Cabral, Fernanda Barbisan, Maria Isabel Azevedo, Luiz Felipe Dias Carli, Sonia de Avila Botton, Jeandre Augusto Dos Santos Jaques, Daniela Bitencourt Rosa Leal
Chagas disease (CD) is caused by Trypanosoma cruzi, an intracellular protozoan which is a potent stimulator of cell-mediated immunity. In the indeterminate form of CD (IFCD) a modulation between pro- and anti-inflammatory responses establishes a host-parasite adaptation. It was previously demonstrated that purinergic ecto-enzymes regulates extracellular ATP and adenosine levels, influencing immune and inflammatory processes during IFCD. In inflammatory sites ATP, as well as its degradation product, adenosine, function as signaling molecules and immunoregulators through the activation of purinergic receptors...
January 3, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28052996/a-novel-bioengineered-3d-human-intestinal-model-for-long-term-infection-of-cryptosporidium-parvum
#14
Maria A DeCicco RePass, Ying Chen, Yinan Lin, Wenda Zhou, David L Kaplan, Honorine D Ward
Cryptosporidium spp. are apicomplexan parasites of global importance that cause human diarrheal disease. In vitro culture models to study this parasite with physiological relevance to in vivo infection remain sub-optimal. Thus, the pathogenesis of cryptosporidiosis remains poorly characterized, and interventions for the disease are limited. In this study, we evaluated the potential of a novel bioengineered 3D human intestinal tissue model (which we developed previously) to support long term infection by C. parvum...
January 4, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28049150/fosl1-inhibits-type-i-interferon-responses-to-malaria-and-viral-infections-by-blocking-tbk1-and-traf3-trif-interactions
#15
Baowei Cai, Jian Wu, Xiao Yu, Xin-Zhuan Su, Rong-Fu Wang
: Innate immune response plays a critical role in controlling invading pathogens, but such an immune response must be tightly regulated. Insufficient or overactivated immune responses may lead to harmful or even fatal consequences. To dissect the complex host-parasite interactions and the molecular mechanisms underlying innate immune responses to infections, here we investigate the role of FOS-like antigen 1 (FOSL1) in regulating the host type I interferon (IFN-I) response to malaria parasite and viral infections...
January 3, 2017: MBio
https://www.readbyqxmd.com/read/28043389/occurrence-of-blood-parasites-in-seabirds-admitted-for-rehabilitation-in-the-western-cape-south-africa-2001-2013
#16
N J Parsons, N M Voogt, A M Schaefer, M A Peirce, R E T Vanstreels
Blood parasites are generally uncommon in seabirds, and knowledge on their epidemiology is further limited by the fact that they often inhabit remote locations that are logistically difficult or expensive to study. We present a long term data set of blood smear examinations of 1909 seabirds belonging to 27 species that were admitted to a rehabilitation centre in Cape Town (Western Cape, South Africa) between 2001 and 2013. Blood parasites were detected in 59% of species (16/27) and 29% of individuals examined (551/1909)...
January 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28042886/spatial-variation-in-soil-biota-mediates-plant-adaptation-to-a-foliar-pathogen
#17
Sini Mursinoff, Ayco J M Tack
Theory suggests that below-ground spatial heterogeneity may mediate host-parasite evolutionary dynamics and patterns of local adaptation, but this has rarely been tested in natural systems. Here, we test experimentally for the impact of spatial variation in the abiotic and biotic soil environment on the evolutionary outcome of the interaction between the host plant Plantago lanceolata and its specialist foliar pathogen Podosphaera plantaginis. Plants showed no adaptation to the local soil environment in the absence of natural enemies...
January 2, 2017: New Phytologist
https://www.readbyqxmd.com/read/28035893/resist-globally-infect-locally-a-transcontinental-test-of-adaptation-by-stickleback-and-their-tapeworm-parasite
#18
Jesse N Weber, Martin Kalbe, Kum Chuan Shim, Noémie I Erin, Natalie C Steinel, Lei Ma, Daniel I Bolnick
Parasite infections are a product of both ecological processes affecting host-parasite encounter rates and evolutionary dynamics affecting host susceptibility. However, few studies examine natural infection variation from both ecological and evolutionary perspectives. Here, we describe the ecological and evolutionary factors generating variation in infection rates by a tapeworm (Schistocephalus solidus) in a vertebrate host, the threespine stickleback (Gasterosteus aculeatus). To explore ecological aspects of infection, we measured tapeworm prevalence in Canadian stickleback inhabiting two distinct environments: marine and freshwater...
January 2017: American Naturalist
https://www.readbyqxmd.com/read/28034347/the-fate-of-mitochondria-after-infection-of-the-mucoralean-fungus-absidia-glauca-by-the-fusion-parasite-parasitella-parasitica-comparison-of-mitochondrial-genomes-in-zygomycetes
#19
Sabrina Ellenberger, Anke Burmester, Johannes Wöstemeyer
Absidia glauca and Parasitella parasitica constitute a versatile experimental system for studying horizontal gene transfer between a mucoralean host and its fusion parasite. The A. glauca chondriome has a length of approximately 63 kb and a GC content of 28%. The chondriome of P. parasitica is larger, 83 kb, and contains 31% GC base pairs. These mtDNAs contain the standard fungal mitochondrial gene set, small and large subunit rRNAs, plus ribonuclease P RNA. Comparing zygomycete chondriomes reveals an unusually high number of homing endonuclease genes in P...
December 30, 2016: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28030606/body-condition-peaks-at-intermediate-parasite-loads-in-the-common-bully-gobiomorphus-cotidianus
#20
Alberto Maceda-Veiga, Andy J Green, Robert Poulin, Clément Lagrue
Most ecologists and conservationists perceive parasitic infections as deleterious for the hosts. Their effects, however, depend on many factors including host body condition, parasite load and the life cycle of the parasite. More research into how multiple parasite taxa affect host body condition is required and will help us to better understand host-parasite coevolution. We used body condition indices, based on mass-length relationships, to test the effects that abundances and biomasses of six parasite taxa (five trematodes, Apatemon sp...
2016: PloS One
keyword
keyword
12556
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"