| electrophoretic detection of population variation within contracaecum ogmorhini (nematoda: ascaridoidea: anisakidae). | this study examined genetic variation among specimens of contracaecum ogmorhini from different otariid hosts and geographical origins using a polymerase chain reaction (pcr)-based mutation detection approach. the first (its-1) and second (its-2) internal transcribed spacers (its) of ribosomal dna (rdna) were amplified individually by pcr, scanned for sequence variation by single-strand conformation polymorphism (sscp), and samples displaying variable sscp profiles were subjected to cycle sequenc ... | 2001 | 11465491 |
| genetic evidence for two sibling species within contracaecum ogmorhini johnston & mawson, 1941 (nematoda: anisakidae) from otariid seals of boreal and austral regions. | genetic variation of contracaecum ogmorhini (sensu lato) populations from different otariid seals of the northern and southern hemisphere was studied on the basis of 18 enzyme loci as well as preliminary sequence analysis of the mitochondrial cyt b gene (260 bp). samples were collected from zalophus californianus in the boreal region and from arctocephalus pusillus pusillus, a. pusillus doriferus and a. australis from the austral region. marked genetic heterogeneity was found between c. ogmorhin ... | 2003 | 12567006 |
| redescription and genetic characterization of selected contracaecum spp. (nematoda: anisakidae) from various hosts in australia. | in the present study, five species of contracaecum railliet & henry 1912 (nematoda: ascaridida), including contracaecum bancrofti, contracaecum microcephalum, contracaecum variegatum, contracaecum eudyptulae, and contracaecum ogmorhini, were redescribed using light and scanning electron microscopy. in addition, in order to elucidate their taxonomic status, first and second internal transcribed spacers (its-1 and its-2, respectively) of nuclear ribosomal dna of each morphospecies were characteriz ... | 2009 | 19214573 |
| molecular characterization of anisakid nematode larvae from 13 species of fish from western australia. | this study characterized anisakid nematodes in estuarine and near-shore species of fish in southern western australia. a total of 108 fish representing 13 species were examined for anisakid larvae. for the molecular characterization of anisakid larvae (n=218), we used pcr-coupled mutation scanning-sequencing-phylogenetic analyses of sequence variation in the internal transcribed spacers of nuclear ribosomal dna. with the exception of sillaginoides punctatus and sillago schomburgkii, all the fish ... | 2012 | 23353682 |
| mitochondrial phylogenomics yields strongly supported hypotheses for ascaridomorph nematodes. | ascaridomorph nematodes threaten the health of humans and other animals worldwide. despite their medical, veterinary and economic importance, the identification of species lineages and establishing their phylogenetic relationships have proved difficult in some cases. many working hypotheses regarding the phylogeny of ascaridomorphs have been based on single-locus data, most typically nuclear ribosomal rna. such single-locus hypotheses lack independent corroboration, and for nuclear rrna typicall ... | 2016 | 27982084 |
| intestinal helminth fauna of the south american sea lion otaria flavescens and fur seal arctocephalus australis from northern patagonia, argentina. | we report on the intestinal helminth fauna of 56 south american sea lions, otaria flavescens, and 5 south american fur seals, arctocephalus australis, from northern patagonia, argentina. a total of 97,325 helminth specimens were collected from sea lions. gravid individuals were represented by 6 species of parasites: 1 digenean (ascocotyle (ascocotyle) patagoniensis), 1 cestode (diphyllobothrium spp.), 3 nematodes (uncinaria hamiltoni, contracaecum ogmorhini s.s., pseudoterranova cattani) and 1 a ... | 2013 | 22967801 |