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John M. Kinsella - One of the best experts on this subject based on the ideXlab platform.

  • Scanning electron microscopy of Turgida turgida (Nematoda: Spiruroidea), parasite of the Virginia opossum, Didelphis virginiana, from southern California.
    Journal of Parasitology, 2001
    Co-Authors: Victoria Matey, Boris I. Kuperman, John M. Kinsella
    Abstract:

    Taxonomic characters for identification of Turgida turgida Rudolphi, 1819, a parasitic nematode of the Virginia opossum Didelphis virginiana, were studied by scanning electron microscopy. The distinguishing feature of the cephalic end is the presence of numerous denticles, structures associated with the internal tooth, and 2 spongelike areas on the inner side of each pseudolabia. The posterior end of male T. turgida differs from that in other species of Physalopteridae by the number of caudal papillae (22), truncated postcloacal papilla, and patterns of ventrocaudal ornamentation.

  • Scanning Electron Microscopy of Turgida turgida (Nematoda: Spiruroidea), Parasite of
    2001
    Co-Authors: Victoria Matey, Boris I. Kuperman, John M. Kinsella
    Abstract:

    Taxonomic characters for identification of Turgida turgida Rudolphi, 1819, a parasitic nematode of the Virginia opossum Didelphis virginiana, were studied by scanning electron microscopy. The distin- guishing feature of the cephalic end is the presence of numerous den- ticles, structures associated with the internal tooth, and 2 spongelike areas on the inner side of each pseudolabia. The posterior end of male T. turgida differs from that in other species of Physalopteridae by the number of caudal papillae (22), truncated postcloacal papilla, and pat- terns of ventrocaudal ornamentation. Turgida turgida Rudolphi, 1819 (Nematoda: Spiruroidea) is a very common nematode in the only marsupial of North America, the Virginia opossum Didelphis virginiana Kerr, 1792 (Alden, 1995). It belongs to the Physalopteridae, which possesses parasites in a wide range of hosts from amphibians to mammals. Classification of physalopterids is based on key morphological features, such as cephalic arrangement; number, size, and position of male caudal papillae; posteroventral ornamentation of the male tail; and number of uteri in the female (5 or more in Tur- gida, 4 or fewer in Physaloptera). These characters were previously studied using light microscopy (LM) and scanning electron microscopy (SEM) of Physaloptera felidis Ackert, 1936 (Marchiondo and Sawyer, 1978); P. praeputialis von Linstow, 1889, and P. rara Hall and Wigdor, 1918 (Tiekotter, 1981); and P. bispiculata Vaz and Pereira, 1935 (Mafra and Landfredi, 1998). To date, only drawings based on LM studies are available for classification of T. turgida (Yamaguti, 1961; Chabaud, 1975; Gray and Anderson, 1982). In the present paper, several key tax- onomic characters of T. turgida are described using scanning electron

Victoria Matey - One of the best experts on this subject based on the ideXlab platform.

  • Scanning electron microscopy of Turgida turgida (Nematoda: Spiruroidea), parasite of the Virginia opossum, Didelphis virginiana, from southern California.
    Journal of Parasitology, 2001
    Co-Authors: Victoria Matey, Boris I. Kuperman, John M. Kinsella
    Abstract:

    Taxonomic characters for identification of Turgida turgida Rudolphi, 1819, a parasitic nematode of the Virginia opossum Didelphis virginiana, were studied by scanning electron microscopy. The distinguishing feature of the cephalic end is the presence of numerous denticles, structures associated with the internal tooth, and 2 spongelike areas on the inner side of each pseudolabia. The posterior end of male T. turgida differs from that in other species of Physalopteridae by the number of caudal papillae (22), truncated postcloacal papilla, and patterns of ventrocaudal ornamentation.

  • Scanning Electron Microscopy of Turgida turgida (Nematoda: Spiruroidea), Parasite of
    2001
    Co-Authors: Victoria Matey, Boris I. Kuperman, John M. Kinsella
    Abstract:

    Taxonomic characters for identification of Turgida turgida Rudolphi, 1819, a parasitic nematode of the Virginia opossum Didelphis virginiana, were studied by scanning electron microscopy. The distin- guishing feature of the cephalic end is the presence of numerous den- ticles, structures associated with the internal tooth, and 2 spongelike areas on the inner side of each pseudolabia. The posterior end of male T. turgida differs from that in other species of Physalopteridae by the number of caudal papillae (22), truncated postcloacal papilla, and pat- terns of ventrocaudal ornamentation. Turgida turgida Rudolphi, 1819 (Nematoda: Spiruroidea) is a very common nematode in the only marsupial of North America, the Virginia opossum Didelphis virginiana Kerr, 1792 (Alden, 1995). It belongs to the Physalopteridae, which possesses parasites in a wide range of hosts from amphibians to mammals. Classification of physalopterids is based on key morphological features, such as cephalic arrangement; number, size, and position of male caudal papillae; posteroventral ornamentation of the male tail; and number of uteri in the female (5 or more in Tur- gida, 4 or fewer in Physaloptera). These characters were previously studied using light microscopy (LM) and scanning electron microscopy (SEM) of Physaloptera felidis Ackert, 1936 (Marchiondo and Sawyer, 1978); P. praeputialis von Linstow, 1889, and P. rara Hall and Wigdor, 1918 (Tiekotter, 1981); and P. bispiculata Vaz and Pereira, 1935 (Mafra and Landfredi, 1998). To date, only drawings based on LM studies are available for classification of T. turgida (Yamaguti, 1961; Chabaud, 1975; Gray and Anderson, 1982). In the present paper, several key tax- onomic characters of T. turgida are described using scanning electron

S. Pascual - One of the best experts on this subject based on the ideXlab platform.

  • Larval nematodes (Spiruroidea: Cystidicolidae) in Octopus vulgaris (Mollusca: Cephalopoda: Octopodidae) from the northeastern Atlantic Ocean.
    Journal of Parasitology, 1999
    Co-Authors: Camino Gestal, E. Abollo, C. Arias, S. Pascual
    Abstract:

    Larval nematode parasites (Spiruroidea: Cystidicolidae) are recorded for the first time in Octopus vulgaris Cuvier, 1797 in the northeastern Atlantic Ocean. Prevalence was 16% and mean intensity was 1.46 worms/host. Body length of larval nematodes ranges from 8.3 to 9.3 mm, with a distance from the anterior end to nerve ring from 187.5 to 200 microm, and to excretory pore 194.6-350 microm. Anatomical characteristics, such as deirid, nerve ring, cephalic alae, excretory pore, pseudolabia amphids, sclerotized protuberance, and anus, examined using light microscopy (LM) or scanning electron microscopy (SEM), are illustrated. The nematode was designed as a cystidicolid "Type A" larva. The hemocytic infiltration present in the host tissue around the nematode capsule and the mechanical compression in the infected organs denote the pathogenicity of this nematode. In the study area, O. vulgaris may play the role of an intermediate or paratenic host in the nematode life cycle.

  • LARVAL NEMATODES (Spiruroidea: CYSTIDICOLIDAE) IN OCTOPUS VULGARIS (MOLLUSCA: CEPHALOPODA: OCTOPODIDAE) FROM THE NORTHEASTERN
    1999
    Co-Authors: Atlantic Ocean, Camino Gestal, E. Abollo, C. Arias, S. Pascual
    Abstract:

    Larval nematode parasites (Spiruroidea: Cystidicolidae) are recorded for the first time in Octopus vulgaris Cuvier, 1797 in the northeastern Atlantic Ocean. Prevalence was 16% and mean intensity was 1.46 worms/host. Body length of larval nematodes ranges from 8.3 to 9.3 mm, with a distance from the anterior end to nerve ring from 187.5 to 200 tmm, and to excretory pore 194.6-350 p.m. Anatomical characteristics, such as deirid, nerve ring, cephalic alae, excretory pore, pseudolabia amphids, sclerotized protuberance, and anus, examined using light microscopy (LM) or scanning electron microscopy (SEM), are illustrated. The nematode was designed as a cystidicolid "Type A" larva. The hemocytic infiltration present in the host tissue arround the nematode capsule and the mechanical compression in the infected organs denote the pathogenicity of this nematode. In the study area, 0. vulgaris may play the role of an intermediate or paratenic host in the nematode life cycle. The common octopus, Octopus vulgaris Cuvier 1797, has the longest history of human exploitation of any cephalopod. The species is thought to have a worldwide distribution in tropical, subtropical, and temperate waters and to play an important role in marine ecosystems wherever it occurs (Mangold, 1983). De- spite its real and potential value to humans as food and as a model for biomedical research (Hanlon and Forsythe, 1985; Boyle, 1990), little information is available on parasites occur- ring in exploited stocks. In the most recent review, Hochberg (1990) noted the important role of octopuses as intermediate, final, paratenic, or reservoir hosts in both monoxenous and het- eroxenous life cycles of at least 12 phyla of parasites. During routine autopsies for parasites, larval nematodes were found in the digestive tracts of octopuses collected in the At- lantic Ocean off the northwest coast of Spain. This contribution represents the first record of a nematode parasite from the genus Octopus in the Atlantic Ocean, describes for the first time a larval spirurid nematode in 0. vulgaris, and represents a new host record for a cystidicolid larva.

Boris I. Kuperman - One of the best experts on this subject based on the ideXlab platform.

  • Scanning electron microscopy of Turgida turgida (Nematoda: Spiruroidea), parasite of the Virginia opossum, Didelphis virginiana, from southern California.
    Journal of Parasitology, 2001
    Co-Authors: Victoria Matey, Boris I. Kuperman, John M. Kinsella
    Abstract:

    Taxonomic characters for identification of Turgida turgida Rudolphi, 1819, a parasitic nematode of the Virginia opossum Didelphis virginiana, were studied by scanning electron microscopy. The distinguishing feature of the cephalic end is the presence of numerous denticles, structures associated with the internal tooth, and 2 spongelike areas on the inner side of each pseudolabia. The posterior end of male T. turgida differs from that in other species of Physalopteridae by the number of caudal papillae (22), truncated postcloacal papilla, and patterns of ventrocaudal ornamentation.

  • Scanning Electron Microscopy of Turgida turgida (Nematoda: Spiruroidea), Parasite of
    2001
    Co-Authors: Victoria Matey, Boris I. Kuperman, John M. Kinsella
    Abstract:

    Taxonomic characters for identification of Turgida turgida Rudolphi, 1819, a parasitic nematode of the Virginia opossum Didelphis virginiana, were studied by scanning electron microscopy. The distin- guishing feature of the cephalic end is the presence of numerous den- ticles, structures associated with the internal tooth, and 2 spongelike areas on the inner side of each pseudolabia. The posterior end of male T. turgida differs from that in other species of Physalopteridae by the number of caudal papillae (22), truncated postcloacal papilla, and pat- terns of ventrocaudal ornamentation. Turgida turgida Rudolphi, 1819 (Nematoda: Spiruroidea) is a very common nematode in the only marsupial of North America, the Virginia opossum Didelphis virginiana Kerr, 1792 (Alden, 1995). It belongs to the Physalopteridae, which possesses parasites in a wide range of hosts from amphibians to mammals. Classification of physalopterids is based on key morphological features, such as cephalic arrangement; number, size, and position of male caudal papillae; posteroventral ornamentation of the male tail; and number of uteri in the female (5 or more in Tur- gida, 4 or fewer in Physaloptera). These characters were previously studied using light microscopy (LM) and scanning electron microscopy (SEM) of Physaloptera felidis Ackert, 1936 (Marchiondo and Sawyer, 1978); P. praeputialis von Linstow, 1889, and P. rara Hall and Wigdor, 1918 (Tiekotter, 1981); and P. bispiculata Vaz and Pereira, 1935 (Mafra and Landfredi, 1998). To date, only drawings based on LM studies are available for classification of T. turgida (Yamaguti, 1961; Chabaud, 1975; Gray and Anderson, 1982). In the present paper, several key tax- onomic characters of T. turgida are described using scanning electron

Simon C Mills - One of the best experts on this subject based on the ideXlab platform.

  • Long-term spatiotemporal stability and dynamic changes in helminth infracommunities of spiny mice (Acomys dimidiatus) in St. Katherine's Protectorate, Sinai, Egypt.
    Parasitology, 2018
    Co-Authors: Jerzy M. Behnke, Anna Bajer, Jolanta Behnke-borowczyk, Natalie Clisham, Francis Gilbert, Aimee Glover, Laura Jeffery, Jonathan Kirk, Ewa J. Mierzejewska, Simon C Mills
    Abstract:

    The importance of parasites as a selective force in host evolution is a topic of current interest. However, short-term ecological studies of host-parasite systems, on which such studies are usually based, provide only snap-shots of what may be dynamic systems. We report here on four surveys, carried out over a period of 12 years, of helminths of spiny mice (Acomys dimidiatus), the numerically dominant rodents inhabiting the dry montane wadis in the Sinai Peninsula. With host age (age-dependent effects on prevalence and abundance were prominent) and sex (female bias in abundance in helminth diversity and in several taxa including Cestoda) taken into consideration, we focus on the relative importance of temporal and spatial effects on helminth infracommunities. We show that site of capture is the major determinant of prevalence and abundance of species (and higher taxa) contributing to helminth community structure, the only exceptions being Streptopharaus spp. and Dentostomella kuntzi. We provide evidence that most (notably the Spiruroidea, Protospirura muricola, Mastophorus muris and Gongylonema aegypti, but with exceptions among the Oxyuroidae e.g. Syphacia minuta), show elements of temporal-site stability, with rank order of measures among sites remaining similar over successive surveys and hence some elements of predictability in these systems.