| fecundity of hoplopleura scapteromydis (phthiraptera: anoplura, hoplopleuridae), ectoparasite of scapteromys aquaticus (rodentia: muridae) in rio de la plata marshlands, argentina. | density and age structure of lice collected from captured scapteromys aquaticus rodents were studied to estimate the fecundity of hoplopleura scapteromydis. the number of eggs with a visible embryo inside (e), nymphs (n), adult males (am), and adult females (af) were recorded for each rodent. for the ith rodent, the fecundity of h. scapteromydis, f(i), was estimated as f(i) = [[e(i) + n(i)]/2]/af(i)/t, where t represents the period of preimaginal development (unknown and arbitrarily considered a ... | 2001 | 11426716 |
| arthropod and filarioid parasites associated with wild rodents in the northeast marshes of buenos aires, argentina. | during 1995, 16 species of arthropods and 2 species of filarioids, totaling 1 287 specimens were collected from 64 wild rodents captured in the hudson natural reserve, buenos aires, argentina. infestation parameters and indexes were analyzed. host specific richness was s = 6, diversity h = 1.48, and relative density rdi = 40%. high values of parasite species richness and diversity were found on oligoryzomys delticola (s = 9; h = 1.40), oxymycterus rufus (s = 9; h = 1.37), and oligoryzomys flaves ... | 2003 | 12973536 |
| the relationship of sex and ectoparasite infestation in the water rat scapteromys aquaticus (rodentia: cricetidae) in la plata, argentina. | i studied the relationship between sex and infestation with ectoparasites in the water rat scapteromys aquaticus from la plata river marshland, argentina. the relative density's index (rdi) for males was 3.90% (females 3.60%). a total of 2653 ectoparasites were collected on 33 male hosts, and 1945 on 31 females. ectoparasite specific richness (s) and diversity (h) were s = 14, h = 1.17 on males, and s = 10, h = 1.52 on females. the similarity between male and female rodents according to their ec ... | 2006 | 18494333 |
| determinants of ectoparasite assemblage structure on rodent hosts from south american marshlands: the effect of host species, locality and season. | the relative effects of host species identity, locality and season on ectoparasite assemblages (relative abundances and species richness) harboured by four cricetid rodent hosts (akodon azarae, oligoryzomys flavescens, oxymycterus rufus and scapteromys aquaticus) were assessed across six closely located sites in buenos aires province, argentina. relative abundances of ectoparasites (14 species including gamasid mites, an ixodid tick, a trombiculid mite, lice and fleas), as well as total ectopara ... | 2010 | 20546127 |
| the systematic position of some nippostrongyline nematodes (trichostrongylina: heligmosomoidea) parasitic in argentinean sigmodontine rodents. | the systematic position of two nippostrongyline nematodes described from argentinean sigmodontine rodents is clarified. the first species, hassalstrongylus multiovatus suriano & navone, 1992, parasitic in akodon simulator thomas from the province of tucumán, was studied on the basis of type and voucher material. h. multiovatus is proposed as a junior synonym of trichofreitasia lenti sutton & durette-desset, 1991, a parasite described from oligoryzomys flavescens (waterhouse) in the province of b ... | 2007 | 17195037 |
| redescription of trichuris laevitestis (nematoda: trichuridae) from akodon azarae and scapteromys aquaticus (sigmodontinae: cricetidae) in buenos aires province, argentina. | trichuris spp. have a cosmopolitan distribution; the species are typically identified by features related to the reproductive system. trichuris laevitestis was described on the basis of specimens collected from rodents captured in punta lara, buenos aires province, argentina. here, t. laevitestis is redescribed considering new and relevant morphological features of diagnostic importance such as arrangement of spines on the spicular sheath, spicule length, length and shape of proximal cloacal tub ... | 2006 | 17152950 |
| interrelationship between ectoparasites and wild rodents from northeastern buenos aires province, argentina. | infestation parameters and indices of mites, ticks and fleas associated with wild rodents from northeastern buenos aires province, argentina, were studied. host species similarity was also analyzed in relation to their ectoparasites. fifty-five rodents were captured from january 2000 to march 2001. in total, 1,022 ectoparasites were collected and three ectoparasite-host associations were new records. however, this is the first study on craneopsylla minerva wolffhuegeli infesting parameters. ecto ... | 2003 | 12700861 |
| a new genus of nippostrongylinae (nematoda: heligmonellidae) from the water rat scapteromys aquaticus (sigmodontinae) in argentina. | a new genus of nippostrongylinae, malvinema n. gen., with 3 coparasitic species m. frederici n. sp., m. carolinae n. sp., and m. victoriae n. sp. from the intestine of the water rat, scapteromys aquaticus thomas (rodentia: muridae), from the northeast of buenos aires province, argentina, is proposed in this study. the new genus shows similarities to 2 neotropical nippostrongylinae: carolinensis (travassos, 1937) by some characters of the synlophe and stilestrongylus freitas, lent and almeida, 19 ... | 2003 | 12659314 |