Publications

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a new species of eimeria schneider, 1875 (apicomplexa: eimeriidae) from the dusky rice rat melanomys caliginosus (tomes) (mammalia: rodentia) in costa rica.we collected faecal samples from 24 dusky rice rats, melanomys caliginosus (tomes) (rodentia: cricetidae: sigmodontinae), in a biological reserve in costa rica, and found three (12.5%) to be infected with a species of eimeria schneider, 1875, which we describe here as new. sporulated oöcysts of eimeria caliginosa n. sp. are almost spheroidal and measure 16-21 × 17-20 (mean 19.6 × 18.2) μm; micropyle, oöcyst residuum and polar granule are absent. sporocysts are ovoidal, 9-13 × 6-8 (mean 11.2 × 6. ...201424832189
new species and records of the mite genus prolistrophorus (acariformes: listrophoridae) from rodents of the subfamily sigmodontinae (rodentia: cricetidae).six fur-mite species of the genus prolistrophorus fain, 1970 (acariformes: listrophoridae) were recorded from central and south american rodents of the subfamily sigmodontinae (rodentia: cricetidae). among them, prolistrophorus (aprolistrophorus) parabidentatus sp. nov. from akodon azarae from argentina and prolistrophorus (aprolistrophorus) tylomys sp. nov. from tylomys nudicaudus from guatemala are described as new for science. new hosts are recorded for the following species: prolistrophorus ...201425236266
redescription of syphacia venteli travassos 1937 (nematoda: oxyuridae) from nectomys squamipes in argentina and brazil and description of a new species of syphacia from melanomys caliginosus in colombia.syphacia venteli travassos, mem inst oswaldo cruz 32:607-613, 1937 is redescribed on the basis of specimens recovered from the type host, nectomys squamipes (brants 1827), from brazil and argentina. specimens determined by quentin (bull mus natl hist nat 2:909-925, 1969) as s. venteli from melanomys caliginosus (tomes 1860) in colombia were re-studied and assigned to a new species. in both species, structures such as the shape of the cephalic plate, details and distribution of the submedian papi ...201020169363
fur mites of the family listrophoridae (acariformes: sarcoptoidea) associated with south american sigmodontine rodents (cricetidae: sigmodontinae).six species of 3 genera belonging to the fur mite family listrophoridae were recorded on skins of south american rodents of the cricetid subfamily sigmodontinae housed in the bavarian state collection of zoology (munich, germany). among them, amlistrophorus geoxus sp. nov. from geoxus valdivianus from chile is described as a new for science, and males of prolistrophorus amazonicus amazonicus fain, 1971 are recorded for the first time. the full generic status for the subgenus amlistrophorus of th ...201223129199
detection of leishmania (viannia) braziliensis complex in wild mammals from colombian coffee plantations by pcr and dna hybridization.the small mammal fauna of coffee plantations in sw colombia was surveyed to determine which of the species present were infected with parasites of the leishmania (viannia) braziliensis complex and might therefore act as reservoirs of human cutaneous leishmaniasis. fifty animals of seven different species were captured. tissue samples were taken from the ears of specimens from each of the seven species. thirty three samples were analysed by polymerase chain reaction (pcr) using oligonucleotide pr ...19989588240
two new eimeria spp. (apicomplexa: eimeriidae) from the dusky rice rat, melanomys caliginosus, tome 1860, in costa rica.we collected fecal samples from 9 dusky rice rats, melanomys caliginosus (rodentia, cricetidae, sigmodontinae), in a biological reserve in costa rica and found 8 (89%) to be infected with 2 eimeria species which we describe here as new. sporulated oocysts (n = 20) of the first, eimeria melanomytis n. sp., are cylindroidal and measure 20.1 × 13.3 μm (18-23 × 13-15); micropyle and oocyst residuum are both absent, but a bilobular polar granule is present. its sporocysts are ovoidal, 10.5 × 7.4 μm ( ...201322924929
endogenous life cycle of eimeria melanomytis (apicomplexa: eimeriidae) from the dusky rice rat, melanomys caliginosus (rodentia: cricetidae: sigmodontinae) in costa rica.endogenous stages of the life cycle of eimeria melanomytis, infecting the peripheral epithelial cells of villi of the small intestine of experimentally infected young dusky rice rats, melanomys caliginosus , were studied. giemsa-stained mucosal scrapings and histological sections were examined for all the stages. eimeria melanomytis has 3 generations of meronts (m), different in size, shape, and number of merozoites (m); and in size, shape, and location of the nuclei within the cytoplasm of the ...201727788039
molecular diversity within melanomys caliginosus (rodentia: oryzomyini): evidence for multiple species.nucleotide sequences from the mitochondrial dna cytochrome-b gene were used to infer phylogenetic relationships and estimate genetic distances from 10 individuals of melanomys caliginosus and to explore the hypothesis that this taxon is comprised of multiple species. individuals of four geographic populations of m. caliginosus from central america (nicaragua and costa rica), panama, venezuela, and ecuador, respectively, were included in this analysis. topologies obtained from maximum parsimony a ...200821614136
intestinal life cycle of eimeria caliginosa (apicomplexa: eimeriidae) from the dusky rice rat, melanomys caliginosus (rodentia: cricetidae: sigmodontinae), in costa rica.the endogenous life cycle of eimeria caliginosa was studied in experimentally infected dusky rice rats, melanomys caliginosus. all endogenous stages were located in the epithelial cells of villi in the small intestine. both giemsa-stained mucosal scrapings and histological sections were studied for the diagnosis of all the life-cycle stages. eimeria caliginosa has 3 generations of meronts (m) that differ by size, shape, and number of merozoites (m), which also differ in their size, shape, and lo ...201829561224
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