| the life history and host specificity of hepatozoon clamatae (apicomplexa: adeleorina) and its-1 nucleotide sequence variation of hepatozoon species of frogs and mosquitoes from ontario. | the life cycle of an intraerythrocytic hemogregarine, hepatozoon clamatae, was studied in green frogs (rana clamitans melanota), bullfrogs (rana catesbeiana), northern leopard frogs (rana pipiens), and in the mosquito, culex territans. gametogenesis, fertilization, and sporogony occurred within cells of the malpighian tubules of laboratory-reared cx. territans that had fed on naturally infected frogs. mature oocysts containing hundreds of sporocysts were observed in mosquitoes 30 days postfeedin ... | 1998 | 9714212 |
| intraerythrocytic development of species of hepatozoon infecting ranid frogs: evidence for convergence of life cycle characteristics among apicomplexans. | intraerythrocytic development of the adeleorin apicomplexans hepatozoon clamatae and hepatozoon catesbianae were investigated in the bullfrog, rana catesbeiana, the green frog, rana clamitans melanota, and the northern leopard frog, rana pipiens. merozoites emerging from hepatic meronts penetrated erythrocytes and underwent 1-3 rounds of binary fission to produce 2-8 merozoites. following their release from infected erythrocytes, individual merozoites entered new cells and transformed into gamon ... | 2000 | 10864239 |
| phylogenetic analysis of hepatozoon species (apicomplexa: adeleorina) infecting frogs of nova scotia, canada, determined by its-1 sequences. | species of hepatozoon are apicomplexan parasites infecting tetrapod vertebrates and hematophagous arthropods. two species, hepatozoon catesbianae and hepatozoon clamatae, have been described inhabiting the erythrocytes of bullfrogs and green frogs. a number of characteristics typically used to distinguish between members of this genus are shared between these 2 species, prompting speculation as to whether or not these organisms are in fact distinct species. to test the species distinction, bullf ... | 2007 | 18314691 |
| relationships between leukocytes and hepatozoon spp. in green frogs, rana clamitans. | there are few published data on amphibian leukocyte profiles, and relationships between amphibian leukocytes and parasites are even less well known. using counts from 35 pairs of blood smears taken 2 days apart, we tested for correlations between leukocyte proportions and infection intensities of hepatozoon spp. (either hepatozoon catesbianae or hepatozoon clamatae) in green frogs (rana clamitans). on average (se), we counted 65.4 (1.7) lymphocytes, 14.0 (1.3) neutrophils, 19.3 (1.6) eosinophils ... | 2009 | 19204336 |
| experimental transmission of hepatozoon clamatae (apicomplexa: adeleida) to the wood frog, rana sylvatica, and to the mosquito culex pipiens. | hepatozoon clamatae naturally infects the erythrocytes of green frogs (rana clamitans), bullfrogs (rana catesbeiana), and northern leopard frogs (rana pipiens) in northeastern north america and uses the mosquito culex territans as a definitive host. in this study, we show that the wood frog, rana sylvatica, supports merogonic development, but not gamogonic development, of this protozoan parasite, and that the mosquito culex pipiens serves as an experimental definitive host for sporogonic develop ... | 2010 | 19895159 |
| influence of hepatozoon parasites on host-seeking and host-choice behaviour of the mosquitoes culex territans and culex pipiens. | hepatozoon species are heteroxenous parasites that commonly infect the blood of vertebrates and various organs of arthropods. despite their ubiquity, little is known about how these parasites affect host phenotype, including whether or not these parasites induce changes in hosts to increase transmission success. the objectives of this research were to investigate influences of the frog blood parasite hepatozoon clamatae and the snake blood parasite hepatozoon sipedon on host-seeking and host-cho ... | 2012 | 24533317 |
| the role of gamont entry into erythrocytes in the specificity of hepatozoon species (apicomplexa: adeleida) for their frog hosts. | hepatozoon species are apicomplexan parasites that infect blood cells and viscera of terrestrial vertebrates. one species, hepatozoon clamatae, primarily infects green frogs, rana clamitans , whereas another, hepatozoon catesbianae, primarily infects bullfrogs, rana catesbeiana , although both species of parasite are capable of infecting either species of frog. the aim of this study was to determine whether the basis for this partial host specificity is manifested at the gamont, or intraerythroc ... | 2013 | 23829695 |