Ciliados (Protista: ciliophora) en branquias de Artemesia longinaris y Pleoticus muelleri (Crustacea decapoda)

Fil: Martorelli, Sergio Roberto. Centro de Estudios Parasitológicos y Vectores, Facultad de Ciencias Naturales, Universidad Nacional de La Plata, Calle 2 N 584 1900 La Plata, ArgentinaFil: Sardella, Norma Haydée. Laboratorio de Parasitología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Funes 3350, [7600] Mar del Plata, Argentin

PARÁSITOS COMO INDICADORES EN ARQUEOLOGÍA

Los estudios bioarqueológicos, dirigidos a la comprensión de los aspectos más relevantes de la cultura y de la ecología de los humanos y de los animales que vivieron en comunidades en el pasado, se realizan principalmente a partir de la información que se puede obtener del material óseo, llegando en ocasiones a inferir la existencia de algunas enfermedades que padecieron los humanos a partir de las marcas registradas y conservadas en las estructuras óseas. La paleoparasitología estudia restos parasitarios presentes en material antiguo, con el fin de complementar información acerca de las condiciones de vida y del ambiente de las poblaciones humanas y de animales en el pasado

New host, geographical records, and some ecological aspect of Absonifibula bychowskyi lawler et overstreet, 1976 (Monogenea: Diclidophoridae) from estuarine areas of Argentina

Background. Monogenean parasites from mixohaline areas of the South Atlantic coast of Argentina are very poorly reported. The aim of this paper is report a new host and locality for Absonifibula bychowskyi, a monogenean confined to fish living in estuarine areas. Some ecological considerations about the host-parasite relationship are also discussed. Materials and Methods. Parasites collected from whitemouth croaker, Micropogonias furnieri (Desmarest, 1823) (Actinopterygii: Sciaenidae), were studied from fixed- and live specimens, with standard procedures used in parasitology. Prevalence, mean intensity, and abundance of parasites were calculated and related to the host body size. Spearman's rank correlation coefficient was calculated to determine possible correlations between host length, parasite intensity, and prevalence. Results. Absonifibula bychowskyi (Monogenea: Diclidophoridae) Lawler et Overstreet, 1976 is reported for the first time from the gills of whitemouth croaker, at the Samborombón Bay, a mixohaline area in the Buenos Aires Province, Southwest Atlantic Ocean. The parasite was found only in juveniles of M. furnieri that use the Samborombón Bay as the main estuarine nursery ground area. When the croaker migrated seawards, A. bychowskyi disappeared from the gills may be related to the increased salinity. Conclusions. This is the first record for Absonifibula bychowskyi in the Southwest Atlantic and M. furnieri. (It constitutes a new host record.) The presence of A. bychowskyi in M. furnieri could be indicative of the origin of the fish.Centro de Estudios Parasitológicos y de Vectore

Examen paleoparasitológico de coprolitos de felinos: Zoonosis durante el Holoceno patagónico

El objetivo del presente fue recuperar información ecológica y biogeográfica del examen paleoparasitológico de coprolitos de fauna asociada a sitios arqueológicos. Las muestras proceden del sitio CCP5, capa IV (6540 ± 110 años AP), Santa Cruz, Argentina. La morfología de los coprolitos sugiere que procederían de grandes felinos. Muestras de 0.5 g de la superficie y del interior de cada uno fueron rehidratadas en fosfato trisódico acuoso y posteriormente procesadas por sedimentación espontánea. Se hallaron huevos de Capillaria sp., similar a C. hepática, de Trichuris sp. y de anoplocefálidos. También se identificó un huevo compatible con Oesophagostomum sp., huevos de ascarídidos y algunos similares a ancilostómidos. Se identificó un ooquiste de Eimeria macuasaniensis. Estos reportes aumentan el cuerpo de datos referentes a la biogeografía para tiempos prehispánicos. La deposición en cuevas que han tenido un uso intensivo pudo significar centros para la transmisión de enfermedades entre las especies animales como así también con el hombre.Sesión de pósters.Asociación de Antropología Biológica de la República Argentina (AABRA

New host, geographical records, and some ecological aspect of Absonifibula bychowskyi lawler et overstreet, 1976 (Monogenea: Diclidophoridae) from estuarine areas of Argentina

Background. Monogenean parasites from mixohaline areas of the South Atlantic coast of Argentina are very poorly reported. The aim of this paper is report a new host and locality for Absonifibula bychowskyi, a monogenean confined to fish living in estuarine areas. Some ecological considerations about the host-parasite relationship are also discussed. Materials and Methods. Parasites collected from whitemouth croaker, Micropogonias furnieri (Desmarest, 1823) (Actinopterygii: Sciaenidae), were studied from fixed- and live specimens, with standard procedures used in parasitology. Prevalence, mean intensity, and abundance of parasites were calculated and related to the host body size. Spearman's rank correlation coefficient was calculated to determine possible correlations between host length, parasite intensity, and prevalence. Results. Absonifibula bychowskyi (Monogenea: Diclidophoridae) Lawler et Overstreet, 1976 is reported for the first time from the gills of whitemouth croaker, at the Samborombón Bay, a mixohaline area in the Buenos Aires Province, Southwest Atlantic Ocean. The parasite was found only in juveniles of M. furnieri that use the Samborombón Bay as the main estuarine nursery ground area. When the croaker migrated seawards, A. bychowskyi disappeared from the gills may be related to the increased salinity. Conclusions. This is the first record for Absonifibula bychowskyi in the Southwest Atlantic and M. furnieri. (It constitutes a new host record.) The presence of A. bychowskyi in M. furnieri could be indicative of the origin of the fish.Centro de Estudios Parasitológicos y de Vectore

Une espece nouvelle de Cucullanus (Nematoda: Cucullanidae) parasite de Genypterus blacodes et G. brasiliensis (Pisces : Ophidiidae) de l'Atlantique Sud

Cucullanus genypteri sp. n, a parasite of Genypterus blacodes Schneider, 1801 and G. brasiliensis Reagan, 1903 (Pisces: Ophidiidae) from different zones of the South West Atlantic Ocean is described and illustrated. The new species is distinguished from other south american members in the genus Cucullanus Mueller, 1777 by the distribution pattern of caudal papillae and by the body measurements, particularly spicule length. C. genypteri represents the first description of a marine species of this genus from Argentina. Variations of parasitism in relation to host size, sex and geographic distribution are also discussed.Cucullanus genypteri n. sp. parasite de Genypterus blacodes Schneider, 1801 et de G. brasiliensis Reagan, 1903 (Pisces: Ophidiidae) de l'Atlantique Sud, est décrit et figuré. L'espèce nouvelle se différencie des autres espèces sud-américaines de Cucullanus Mueller, 1777 par la disposition des papilles caudales et par l'ensemble des dimensions, en particulier par la longueur des spicules. C. genypteri est la première espèce du genre décrite en Argentine. Les variations du parasitisme liées à la taille, au sexe et à la distribution géographique des hôtes sont commentées par les auteurs.Centro de Estudios Parasitológicos y de Vectore

Larvae and adults of <i>Hysterothylacium aduncum</i> (Rudolphi, 1802) (Nematoda: Anisakidae) in fishes and crustaceans in the South West Atlantic

La presence de Hysterothylacium aduncum (kudolphi, 1802) chez cinq especes de poissons et chez une espece de crustaces est signalee dans ce travail. Les larves du troisieme stade ont ete trouvees chez le crustace Themisto gaudichaudii et sur les mesenteres des poissons Engraulis anchoita et Merluccius hubbsi, les larves du quatrieme stade ont ete prelevees dans l'appareil digestif de M. hubbsi et de Scomber japonicus et les nematodes adultes ont ete recoltes dans l'estomac et dons l'intestin de M. hubbsi, S. japonicus, Genypterus blacodes et Genypterus brasiliensis. Les nematodes sont decrits, mesures et figures. La prevalence et l'intensite moyenne du parasitisme sont calculees chez les differents hotes et dans les differentes zones geographiques s'etendant de la Zone de Peche Commune Argentine-Uruguay aux cotes de la Patagonie. Une augmentation du parasitisme du nord au sud a ete observee. Un schema du cycle biologique de H. aduncum chez les especes d'hotes considerees dans cette etude, est propose par les auteurs.Hysterothylacium aduncum (Rudolphi, 1802) is reported from five fishes and one invertebrate species. Third-stage larvae were found in the crustacean Themisto gaudichaudii and in mesenteries of the fishes Engraulis anchoita and Merluccius hubbsi ; fourth-stage larvae were recovered from the digestive tract of M . hubbsi and Scomber japonicus and adult specimens were obtained from the stomach and intestine of M. hubbsi, S. japonicus, G enypterus blacodes and Genypterus brasiliensis. Nematodes are described, measured and illustrated. Parasitic prevalence, mean intensity and range were calculated in relation to different geographic zones, from the Argentinean-Uruguayan Common Fishing Zone to Patagonic areas. An increase of parasitism from the northern areas southwards was observed. The life-cycle of H. aduncum, involving the host species considered, is also postulated.Centro de Estudios Parasitológicos y de VectoresUniversidad Nacional de Mar del Plat

Genetic relationships among species of Contracaecum railliet & Henry, 1912 and Phocascaris Höst, 1932 (Nematoda: Anisakidae) from pinnipeds inferred from mitochondrial cox2 sequences, and congruence with allozyme data

The genetic relationships among 11 taxa, belonging to the genus Contracaecum (C. osculatum A, C. osculatum B, C. osculatum (s.s.), C. osculatum D, C. osculatum E, C. osculatum baicalensis, C. mirounga, C. radiatum, C. ogmorhini (s.s.), C. margolisi) and Phocascaris IPhocascaris cystophorae), parasites as adults of seals, were inferred from sequence analysis (519 bp) of the mitochbndrial cytochrome c oxidase subunit II (mtDNA cox2) gene. Phylogenetic analyses obtained from Parsimony (MP) and Neighbour-Joining (NJ) K2P distance values generated similar topologies, each well supported at major nodes. All analyses delineated two main clades: the first encompassing the parasites of the phocid seals, i.e. the C. osculatum species complex, C. osculatum baicalensis, C. mirounga and C. radiatum, with the latter two species forming a separate subclade; the second including the parasites of otarids, i.e. C. ogmorhini (s.s.) and C. margolisi. An overall high congruence between mtDNA inferred tree topologies and those produced from nuclear data sets (20 allozyme loci) was observed. Comparison of the phylogenetic hypothesis here produced for Contracaecum spp. plus Phocascaris with those currently available for their definitive hosts (pinnipeds) suggests parallelism between hosts and parasite phylogenetic tree topologies.Fil: Mattiucci, Simonetta. Università di Roma; ItaliaFil: Paoletti, M.. Università di Roma; Italia. Università degli Studi della Tuscia; ItaliaFil: Webb, S.C.. Cawthron Institute; Nueva ZelandaFil: Sardella, Norma Haydee. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología. Laboratorio de Parasitología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Timi, Juan Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Berland, B.. University of Bergen; NoruegaFil: Nascetti, G.. Università degli Studi della Tuscia; Itali

Mixosporidios parasitos musculares de peces del mar argentino : incidencia, reacciones de respuesta ante la agresión paarsitaria, consideraciones zoogeográficas y aspectos tecnológicos

Facultad de Ciencias Naturales y Muse

Parasites in rodent coprolites from the historical archaeological site Alero Mazquiarán, Chubut Province, Argentina

The aim of this study was to examine the parasitic remains that were found in rodent coprolites collected from the archaeological site Alero Mazquiarán (Chubut Province, 45º44&apos;15"S, 70°25&apos;9"W), which is assigned to the interface of the Araucanian and Tehuelche cultures, dated at 212 ± 35 years B.P. The faecal material from two unidentified rodent species (X-10 and X-11) was collected from one human pelvic cavity found in a multiple burial. The faecal samples were processed and examined using paleoparasitological procedures. The X-10 coprolites were positive for eggs of Monoecocestus sp. (Cestoda: Anoplocephalidae) and the X-11 faeces were positive for Pterygodermatites sp. (Nematoda: Rictulariidae), Trichosomoides sp. (Nematoda: Trichosomoididae) and Monoecocestus sp. In this study, we discuss parasitic life cycles, the zoonotic importance of parasites and the behaviour of the aboriginal people