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447 results for “parasitic nematode”
Fig. 1 in Are juveniles of the enigmatic deep-sea nematode Rhaptothyreus (Rhaptothyreida: Rhaptothyreidae) parasitic?
Fig. 1. Rhaptothyreus typicus Hope & Murphy, 1969. Line drawings. A. Lateral view of male head. B. Lateral view of moulting juvenile head, with details of surface striations on outer cuticle and outline of amphid under moulting cuticle. C. Anterior body region of male. D. Anterior body region of juvenile. E. Lateral view of male mid-body region. F. Posterior body region of male. G. Posterior body region of juvenile. Arrows show the position of the chord (c) and turgescent cells (t). Scale bar: A–B = 50 µm, C–D = 75 µm, E = 60 µm, F–G = 70 µm.
Fig. 4 in Are juveniles of the enigmatic deep-sea nematode Rhaptothyreus (Rhaptothyreida: Rhaptothyreidae) parasitic?
Fig. 4. Rhaptothyreus typicus Hope & Murphy, 1969. Scanning electron micrographs. A-B. Male head. C. Juvenile head. D. Male posterior body region. Scale bar: A = 20 µm, B = 8 µm, C = 12 µm, D = 16 µm.
Fig. 3 in Are juveniles of the enigmatic deep-sea nematode Rhaptothyreus (Rhaptothyreida: Rhaptothyreidae) parasitic?
Fig. 3. Rhaptothyreus typicus Hope & Murphy, 1969. Light micrographs (moulting juvenile). A. Lateral view of head, showing stylet-like structure. B. Sharp transition between anterior (left) and posterior trophosome (right). C. Lateral chord, mid-body region. D. Posterior body region. Scale bar: A = 20 µm, B = 40 µm, C = 28 µm, D = 25 µm.
Fig. 2 in Are juveniles of the enigmatic deep-sea nematode Rhaptothyreus (Rhaptothyreida: Rhaptothyreidae) parasitic?
Fig. 2. Rhaptothyreus typicus Hope & Murphy, 1969. Light micrographs (♂). A. Lateral view of head showing amphid. B. Mid-body region showing cuticle, turgescent cells and portion of anterior trophosome with rod-shaped structures. C. Cells of lateral chord with clear, round inclusions. D. Posterior body region. Arrows show the position of the two small ducts apparently joining just prior to the cloacal opening. Scale bar: A, C = 20 µm, B = 18 µm, C = 30 µm.
FIGURE 3. Phasmarhabditis bonaquaense n in Phasmarhabditis bonaquaense n. sp. (Nematoda: Rhabditidae), a new slug-parasitic nematode from the Czech Republic
FIGURE 3. Phasmarhabditis bonaquaense n. sp. light microscopy: Males A – B. A: male, tail region, lateral view; B: male, tail region, ventral view. Dauer juveniles C – D. C: DJs, tail region; D: DJs, head region.
FIGURE 2. Phasmarhabditis bonaquaense n in Phasmarhabditis bonaquaense n. sp. (Nematoda: Rhabditidae), a new slug-parasitic nematode from the Czech Republic
FIGURE 2. Phasmarhabditis bonaquaense n. sp. light microscopy: Females A – D. A: female, tail region, ventral view; B: female, tail region, lateral view; C: female, mid-body region with vulva; D: females, head region.
FIGURE 4. Phasmarhabditis bonaquaense n in Phasmarhabditis bonaquaense n. sp. (Nematoda: Rhabditidae), a new slug-parasitic nematode from the Czech Republic
FIGURE 4. Phasmarhabditis bonaquaense n. sp. scanning electron microscopy: Dauer juveniles A – B. A: DJs, head region with aphid (a) and lateral fields; B: DJs, tail region with anus, phasmid (p) and lateral fields. Females C – E. C: female, head region with labial papillae (lp), cephalic papillae (cp), small papilla-like protrusion (p) and amphid (a); D: female, tail region with phasmids (p), tail terminus broken; E: female, lateral fields. Males F. F: male, tail region with bursa and single papilla (s).
Fig. 1 in Description Of The Nematode Dirofilaria Repens (Nematoda, Onchocercidae) Parasitic In Dogs In Ukraine
Fig. 1. Head end of DiroFIlaria repens: a — mouth opening (Mo), cuticular layer (Cl); head papillae (Hp); b — esophagus (Es).
Fig. 2 in Description Of The Nematode Dirofilaria Repens (Nematoda, Onchocercidae) Parasitic In Dogs In Ukraine
Fig. 2. Tail end of Ơ DiroFIlaria repens: a — lateral alae (Wl), longer spicule (Sl), c — shorter spicule (Ssh); b — proximal end of the spicule (Sp), distal end of the spicule (Sd), wide part (Pw), narrow part (Pn), triangular widening (Wt); c — caudal papillae.
Photographs of parasites encapsulated in Cepaea nemoralis shells (appendix to the paper "Morph-dependent effect of nematode infection on host movement in the land snail *Cepaea nemoralis* (Mollusca, Gastropoda)")
<p>A set of four photographs taken of shell fragments of Cepaea nemoralis (grove snail), taken in the course of the project leading to the manuscript titled: "Morph-dependent effect of nematode infection on host movement in the land snail *Cepaea nemoralis* (Mollusca, Gastropoda)". Each photograph shows a parasite encapsulated/trapped in the shell by the snail:</p> <p>AcaRX3_3.tif: a mite (presumably Riccardoella sp.)<br> NemaBX7_1.tif, NemaBX7_3.tif, NemaRK5_2.tif: unidentified nematodes (note in the latter image, the clearly visible brown-band on yellow background pattern of the shell).</p> <p>A scale bar (0.25 mm) is overlaid on each image</p> <p> </p>
Fig. 7 in Nematodes Of The Genus Trichuris (Nematoda, Trichuridae), Parasitizing Sheep In Central And South-Eastern Regions Of Ukraine
Fig. 7. Tail end of Ơ Т. globulosa (×50, ×100, ×400, ×1000): 1 — spherical dilation of distal end of spicule sheath; 2 — distal end of spicule; 3 — proximal end of spicule; 4 — spicule; 5 — spines at spicule sheath; 6 – cylindrical protrusion at the apex of the spherical dilation of spicule sheath.
Fig. 6 in Nematodes Of The Genus Trichuris (Nematoda, Trichuridae), Parasitizing Sheep In Central And South-Eastern Regions Of Ukraine
Fig. 6. Tail end of Ơ T. skrjabini (×50, ×100, ×400, ×1000): 1 — dilated distal end of spicule sheath; 2 — spines of spicule sheath; 3 — spicule; 4 — spicule sheath; 5 — distal end of spicule; 6 — proximal end of spicule.
Fig. 8 in Nematodes Of The Genus Trichuris (Nematoda, Trichuridae), Parasitizing Sheep In Central And South-Eastern Regions Of Ukraine
Fig. 8. Tail end of Ơ Т. оvis (× 50, ×100, ×400, ×1000): 1 — spherical dilation of the distal end of spicule sheath; 2 — apex of spherical dilation of spicule sheath; 3 — spicule sheath; 4 — spicule; 5 — distal end of spicule; 6 — proximal end of spicule; 7 — spines of spicule sheath.
Fig. 1 in Nematodes Of The Genus Trichuris (Nematoda, Trichuridae), Parasitizing Sheep In Central And South-Eastern Regions Of Ukraine
Fig. 1. The species ratio of nematodes of the genus Тrichuris, isolated from sheep in central and south-eastern regions of Ukraine.
Fig. 1 in Species Composition And Structure Of The Communities Of Plant-Parasitic And Free-Living Soil Nematodes In The Greenhouses Of Botanical Gardens Of Ukraine
Fig. 1. Dendrogram of similarity of the nematode communities in the greenhouses of botanical gardens of Ukraine (amalgamation by the method of complete linkage). Explanation of the abbreviations is given in table 2. Рис. 1. Дендрограмма сходства нематодных сообществ в оранжереях ботанических садов Украины (объединение по методу полной связи). Расшифровка сокращений дана в таблице 2.
Fig. 2 in Species Composition And Structure Of The Communities Of Plant-Parasitic And Free-Living Soil Nematodes In The Greenhouses Of Botanical Gardens Of Ukraine
Fig. 2. Dendrogram of similarity of plant-parasitic nematodes' communities in the greenhouses of botanical gardens of Ukraine (amalgamation by the method of complete linkage). Explanation of the abbreviations is given in table 2.
Contrasting parasite-mediated reductions in fitness within vs. between patches of a nematode host
<p>Host and parasites interact across spatial scales, but parasite-mediated fitness effects are often measured at local scales only. Recent work suggests that parasites can reduce host fitness during dispersal between patches, highlighting the potential for both within- and between-patch effects to contribute to the net fitness consequences of parasitism. Building on this work, we measured the contribution of the dispersal phase to parasite-mediated reductions in host fitness. We used the nematode <em>Caenorhabditis elegans</em> and its natural microsporidian parasite <em>Nematocida parisii</em> to quantify the fitness consequences of parasitism at the individual, population, and metapopulation level. <em>N. parisii</em> reduced individual fecundity and population growth but had its greatest fitness impact at the dispersal stage: parasitism reduced the fitness of dispersing larvae by 63 – 100%. These results indicate that the cost of parasitism in this system is greatly underestimated if the metapopulation level is not taken into account. We also found that the effects of <em>N. parisii</em> vary with host genotype, and the relative advantage of the most resistant genotype increases with inclusion of the dispersal stage. Taken together, our findings demonstrate that host-parasite interactions at the dispersal stage magnify selection for parasite resistance.</p>
Fig. 2 in Parasitic Nematodes Of Reptiles (Lizards And Snakes) In The Monte Desert Of Argentina
Fig. 2. Environments where the samplings were performed. Capture locations of L. darwinii, L. riojanus and A. longicauda. Town of the Encón, Department of 25 de Mayo (A, B, C)
Fig. 3. Studied hosts. A in Parasitic Nematodes Of Reptiles (Lizards And Snakes) In The Monte Desert Of Argentina
Fig. 3. Studied hosts. A = Philodryas trilineata, B = Aurivela longicauda (photo: Ignacio Her- nandez), C = Liolaemus darwinii (photo: Claudio Mendez), D = Liolaemus riojanus
Figure 3 in Genetic variation within a species of parasitic nematode, Skrjabingylus chitwoodorum, in skunks
Figure 3: Maximum likelihood phylogenetic tree of 492 base pair fragment of the cytochrome oxidase I gene for 44 samples of Skrjabingylus. Maximum likelihood analysis was performed using the best-fitting model, Hasegawa-Kishino-Yano of DNA substitution with Gamma distribution. Bootstrap values are based on 1000 replicates and values ≥70 are shown on branches. Number with prefix ASK identifies the specific host from which the sample was collected. Prefix KP is a Genbank accession number.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.