No description available.

six species of gyliauchenids are reported in this study, five in the genus Gyliauchen and one in Apharyngogyliauchen. G. pomacentri n.sp. is described from a single specimen recovered from one of one Pomacentrus philippinus, G. parapapillatus n.sp. is described from 42 specimens in one of one Siganus virgatus. Gyliauchen zancli n.sp. is described from a single specimen in one of one Zanclus cornutus. Gyliauchen nahaensis Ozaki, 1937 is redescribed from 189 specimens in one of two siganus punctatus and establishes a new locality record, and in one of one zanclas cornutus, a new host record. Gyliauchen sp. is described from two specimens of two of four Siganus spinus.

Of sixty-four bobcats, Lynx rufus rufus, collected in Virginia end North Carolina, twenty-five percent were found to be infected with an unidentified lungworm. As the literature showed no record of lungworm parasites from Lynx rufus rufus, a study was made of the lungworms of the cat family, Felidae. A new metastrongylid genus and species is here described, named and classified. The name is designated as Lynxrufus wilsoni. Lynxrufus wilsoni is placed tentatively in the subfamily Skrjabingylinae due to the similarity of its male reproductive organs to the male reproductive organs of the other members of that subfamily. / Ph. D.

Orientador: João Aristeu da Rosa / Banca: Marlene Tiduko Ueta / Banca: Elenice Messias do Nascimento Gonçalves / Banca: Silmara Marques Allegretti / Banca: Mara Cristina Pinto / Resumo: A estrongiloidíase é uma doença parasitária que tem distribuição mundial heterogênea, cuja prevalência é dividida em três categorias: esporádica (<1%), endêmica (1-5%) e hiperendêmica (>5%). Na região de Araraquara, estudos de frequência de enteroparasitoses vêm sendo conduzidos desde 1970 e mostram que a estrongiloidíase é endêmica na região. Com o intuito de realizar caracterização morfométrica de diferentes isolados humanos desse helminto, provenientes dos municípios de Araraquara, Américo Brasiliense, Gavião Peixoto, Motuca e Rincão foi feita a mensuração de larvas rabditóides e filarióides e sequenciamento da região ITS-1 do rDNA das larvas filarióides. Com o auxilio do programa de captura e mensuração de imagens Motic Images Advanced 3.2., os parâmetros das larvas rabditóides e filarióides propostos por TEIXEIRA, 1996, foram mensurados após fixação das mesmas em TAF. A extração do DNA genômico foi realizada segundo protocolo descrito por NILFOROUSHAN et al., 2007 e em seguida realizou-se a amplificação do ITS-1 por meio de NESTED-PCR. Os fragmentos de aproximadamente 680 pb obtidos foram purificados, sequenciados e a comparação de sequências foi realizada pelo programa ClustalW. Apenas com os resultados da análise morfométrica, não foi possível caracterizar diferentes cepas de S. stercoralis, uma vez que... (REsumo completo, clicar acesso eletrônico abaixo) / Abstract: Strongyloidiasis is a parasitic disease that occurs worldwide heterogeneous, whose prevalence is divided into three categories: sporadic (<1%), endemic (1-5%) and hyperendemic (> 5%). In the region of Araraquara, studies the frequency of intestinal parasites have been conducted since 1970 and show that strongyloidiasis is endemic in the region. In order to perform morphometric characterization of different isolates of human intestinal worms, from the municipalities of Araraquara, Américo Brasiliense, Gavião Peixoto, Motuca and Rincão the measurement was made of rhabditiforms and filariforms larvae and sequencing of the ITS-1 rDNA filariform larvae. With the help of the program capture and measurement of images Motic Images Advanced 3.2., the rhabditiforms and filariforms larvae parameters proposed by TEIXEIRA, 1997, were measured after fixed on the TAF. The extraction of genomic DNA was performed according to protocol described by NILFOROUSHAN et al., 2007 and then held the amplification of ITS-1 by nested-PCR. Fragments of about 680 bp obtained were purified, sequenced and the sequence comparison was performed by the program ClustalW. Only the results of the morphometric analysis was not possible to characterize different S. stercoralis strains, since the values of the parameters measured were quite homogeneous in larvae... (Complete abstract click electronic access below) / Doutor

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Call number: LD2668 .T4 1966 N632 / Master of Science

This study investigates the life cycle of Sphaerospora truttae, a myxozoan parasite of the Atlantic salmon, using molecular methods based on the 185 rONA. DNA sequencing showed that the 185 rONA of S. truttae differs substantially from the sequence obtained from its proposed alternate actinosporean life cycle stage, Echinactinomyxon type 5. With more than 90% sequence identity Echinactinomyxon type 5 is closely related to Myxobolus portucalensis whereas S. truttae with an extraordinary long 185 sequence (2541 bp), with inserts in the variable regions of the gene, does not relate closely to any myxozoans. On the basis of the obtained sequence for S. truttae, a single round nested peR assay was developed which allows low-level detection and specific identification of S. truttae in all life cycle stages. Furthermore, two of the primers from the peR assay were successfully used on tissue sections in an optimised in situ hybridisation (ISH) protocol. ISH experimentally identified the gills as the predominant entry locus of S. trottse into the fish host and it detected the spatiotemporal migration of the parasite via the vascular system into the target organ, the kidney. The ISH protocol and the peR assay were also used to screen oligochaetes and other co-occurring invertebrates for S. truttae infection but an alternate host for S. truttse could not be identified. However, 12 actinosporean stages were found and they were characterized on the basis of their 185 rONA, together with 9 further myxosporean species from wild fish in the same riverine habitat. Three actinosporeans were found to be genetically identical with three myxosporeans (Myxidium truttae, Chloromyxum truttse and Chloromyxum sp.) and thus represent alternate life cycle stages of these species. Phlyogenetic analysis of the myxozoans identified a very basal position of S. truttae and S. elegans, as a sister group to the marine species. All other species were nested in the freshwater clades and clustered according to host tissue localization, but independent from host species or myxozoan spore taxonomy.

No description available.

No description available.

No description available.