Search results for "parasitología"
showing 10 items of 45 documents
Helminth associations in white-toothed shrews Crocidura russula (Insectivora : Soricidae) from the Albufera Natural Park, Spain
2004
The helminths of 218 white-toothed shrews from 29 sites in 2 biotopes in the Albufera Natural Park (Valencia, Spain) were examined from July 1990 to August 1991. An association analysis of helminths occurring at a prevalence of more than 4% was carried out for 4 species of cestodes located in the intestine (Hymenolepis pistillum, H. scalaris, H. tiara, and Pseudhymenolepis redonica) and 3 species of nematodes (Pseudophysaloptera sp. located in the stomach, Stammerinema rhopocephala larvae in the intestine and abdominal cavity, and Porrocaecum sp. in the thoracic and abdominal cavities). Bivariate (species pairs) versus multivariate analyses (associations within the entire set of species) we…
Ecologia d'ostracodes simbionts (Entocytheridae) de carrancs invasors a Europa
2014
Els entocitèrids són una família d'ostracodes (Crustacea) ectosimbionts (bàsicament comensals) d'altres crustacis, majoritàriament decàpodes d'aigua dolça. Gran part de les espècies d'entocitèrids són originàries d'Amèrica del Nord i Central, i d'Oceania, associades a carrancs de riu americans i australians. No s'han descobert espècies d'entocitèrids en els carrancs de riu natius d'Europa. Les darreres dècades, els carrancs natius europeus s'han vist greument perjudicats per la invasió de carrancs exòtics, degut a fenòmens d'exclusió competitiva i transmissió de simbionts parasitaris. En la present tesi, hem avaluat la presència d'entocitèrids associats a carrancs de riu (natius i exòtics) …
Uncinaria hamiltoni (Nematoda: Ancylostomatidae) in South American Sea Lions, Otaria flavescens, From Northern Patagonia, Argentina
2004
Thirty-one South American sea lion pups (Otaria flavescens) found dead in Punta León, Argentina, during the summer of 2002, were examined for hookworms (Uncinaria hamiltoni). Parasite parameters were analyzed in 2 locations of the rookery, i.e., a traditional, well-structured breeding area and an expanding area with juveniles and a lax social structure. Prevalence of hookworms was 50% in both localities, and no difference was observed in prevalence between pup sexes (P > 0.05). Hookworms were concentrated in the small intestine. Transmammary transmission is assumed because only adult hookworms were found in the pups. The mean intensity of hookworms per pup was 135; the mean intensity in fem…
Aplicación del binomio Apodemus sylvaticus /helminto como bioindicador de la regeneración del Parc Natural de la Serra Calderona (Comunitat Valencian…
2015
El estudio del binomio Apodemus sylvaticus/helminto ha sido propuesto como un bioindicador del proceso de regeneración postincendio en ecosistemas mediterráneos. El presente trabajo, enmarcado en un proyecto multidisciplinar que lleva por título “Procesos de Recuperación de Ecosistemas Perturbados por el Fuego a través del modelo Helmintos/Micromamíferos” y que fue iniciado por el grupo Parasites & Fire, del Departamento de Parasitología de la Universidad de Farmacia de la Universidad de Valencia, ofrece nuevos resultados que avalan su validación en el Parc Natural de la Serra Calderona (Comunitat Valenciana, España), la cual sufrió un devastador incendio forestal en 1992. Durante 21 años (…
Simúlidos (Diptera: Simuliidae) de los ríos de la Comunidad Valenciana: Implicaciones en la salud pública y su control
2018
Los simúlidos (Diptera: Simuliidae) se encuentran distribuidos por casi todo el mundo. Su presencia está ampliamente influenciada por la disponibilidad de cursos de agua con flujo, necesarios para el desarrollo de los estados inmaduros (ADLER & McCREADIE, 2002), ocupando ambientes que van desde cursos temporales hasta grandes ríos. Los simúlidos crían en aguas corrientes, se les puede encontrar tanto en arroyos y torrentes de montaña como en los lentos flujos de agua de los ríos en sus tramos bajos. Además, existen unas pocas especies las cuales se han adaptado a flujos de agua tan escasos donde incluso la corriente es casi imperceptible (BURGER, 1987). En cualquier caso, se sabe que cierto…
Patterns in Size and Shedding of Fasciola hepatica Eggs by Naturally and Experimentally Infected Murid Rodents
2002
Using samples collected on the island of Corsica, a comparative study was done of the morphometry of Fasciola hepatica eggs shed by cattle and by naturally and experimentally infected murid rodents (wild Mus musculus and Rattus rattus and Rattus norvegicus Wistar laboratory strain). Eggs shed by murids are smaller in size than those shed by naturally infected cattle. A second study analyzed the number of F. hepatica eggs shed in murid feces at different time intervals, i.e., months, days, and 6-hr periods, by the Kato-Katz technique. Both experimentally and naturally infected black rats (R. rattus) were used, and Wistar rats were experimentally infected and included for comparison. The pres…
Ligophorus pilengas n. sp. (monogenea: ancyrocephalidae) from the introduced so-iuy mullet, mugil soiuy (teleostei: mugilidae), in the sea of Azov an…
2004
The monogenean Ligophorus chabaudi was originally described on the gills of the flathead mullet, Mugil cephalus, and was subsequently reported on the So-iuy mullet, Mugil soiuy. However, the morphology of sclerotized parts and multivariate statistical analyses suggest that the form from the So-iuy mullet represents a new species. This study provides a description of the new species Ligophorus pilengas n. sp. and provides additional morphological data concerning the morphology of the ventral bar that might be useful for the diagnosis of Ligophorus. Ligophorus pilengas n. sp. is the second species of Ligophorus reported on the So-iuy mullet. Zoogeographical records indicate that L. pilengas n…
Coprology of Panthera tigris altaica and Felis bengalensis euptilurus from the Russian Far East
2007
Fecal samples from the Siberian tiger (Panthera tigris altaica) and the Amur cat (Felis bengalensis euptilurus) from Far Eastern Russia, were examined for parasites. A natural sedimentation methodology was used and a complete examination of all the sediment was performed. This fecal investigation allowed us to isolate and identify several developmental stages of gastrointestinal, hepatic, and respiratory parasites. Five parasites were found from P. t. altaica: 11 trematodes (Platynosomum fastosum) and 4 nematodes (Strongyloides sp., Ancylostomatidae, Toxascaris leonina, and Toxocara cati). Five parasites were found from F. b. euptilurus: 1 cestode (Diplopylidium sp.) and 4 nematodes (Trichu…
Development of an antibody-based capture enzyme-linked immunosorbent assay for detecting echinostoma caproni (trematoda) in experimentally infected r…
2003
The present study reports on the development of a coproantigen capture enzyme-linked immunosorbent assay (ELISA) for detecting Echinostoma caproni in experimentally infected rats. The capture ELISA was based on polyclonal rabbit antibodies that recognize excretory–secretory (ES) antigens. The detection limit of pure ES was 3 ng/ml in sample buffer and 60 ng/ml in fecal samples. The test was evaluated using a follow-up of 10 rats experimentally infected with 100 metacercariae of E. caproni, and the results were compared with those of other diagnostic methods such as parasitological examination and antibody titers determined by indirect ELISA. Coproantigens were detected in all the infected r…
Kinetics of antibodies and antigens in serum of mice experimentally infected with echinostoma caproni (trematoda: echinostomatidae)
2005
The present study reports on the kinetics of antibodies and antigens in serum of mice experimentally infected with 75 metacercariae of Echinostoma caproni during the first 12 wk postinfection (wpi). Antibody titers in the serum of mice were determined by an indirect enzyme-linked immunosorbent assay (ELISA) using excretory/secretory (ES) antigens of E. caproni. The early detection of antibodies against ES antigens of E. caproni is feasible using indirect ELISA. Mice developed significant antibody responses at 2 wpi, and the values progressively increased until the end of the experiment. This may be related to the intestinal absorption of adult worm antigens that induces humoral responses. T…