Research Topics
| Gediminas ValkiunasSummaryAffiliation: Institute of Ecology Country: Lithuania Publications
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Detail Information
Publications
Further observations on in vitro hybridization of hemosporidian parasites: patterns of ookinete development in haemoproteus sppGediminas Valkiunas
Institute of Ecology, Nature Research Centre, Akademijos 2, Vilnius 21, LT 08412, Lithuania e mail
J Parasitol 99:124-36. 2013..The next steps in these studies should be the development of nuclear markers for distinguishing hemosporidian hybrid organisms and the experimental observation of further development of hybrid ookinetes in vectors...- Novel Haemoproteus species (Haemosporida: Haemoproteidae) from the swallow-tailed gull (Lariidae), with remarks on the host range of hippoboscid-transmitted avian hemoproteidsIris I Levin
University of Missouri St Louis, Department of Biology, St Louis, MO 63121, USA
J Parasitol 98:847-54. 2012.... - A new morphologically distinct avian malaria parasite that fails detection by established polymerase chain reaction-based protocols for amplification of the cytochrome B genePavel Zehtindjiev
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113 Sofia, Bulgaria
J Parasitol 98:657-65. 2012..We suggest possible explanations of these results and call for additional research on evolution of mitochondrial genome of hemosporidian parasites... 
Coquillettidia (Culicidae, Diptera) mosquitoes are natural vectors of avian malaria in AfricaKevin Y Njabo
Center for Tropical Research, UCLA Institute of the Environment, Los Angeles, California, USA
Malar J 8:193. 2009..The mosquito vectors of Plasmodium spp. have largely been overlooked in studies of ecology and evolution of avian malaria and other vertebrates in wildlife...- Polymerase chain reaction-based identification of Plasmodium (Huffia) elongatum, with remarks on species identity of haemosporidian lineages deposited in GenBankGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius LT 08412, Lithuania
Parasitol Res 102:1185-93. 2008..elongatum and P. relictum, respectively. Some other incorrect species identifications of avian haematozoa in GenBank have been identified. We propose a strategy to minimise the number of such mistakes in GenBank in the future... 
Haemosporidian vector research: marriage of molecular and microscopical approaches is essentialGediminas Valkiunas
Nature Research Centre, Vilnius, Lithuania
Mol Ecol 20:3084-6. 2011..They identified numerous associations between Culicoides spp. and Haemoproteus spp., indicating directions for future targeting vector studies of haemoproteids...- New species of haemosporidian parasites (Haemosporida) from African rainforest birds, with remarks on their classificationGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius, 08412, Lithuania
Parasitol Res 103:1213-28. 2008..This study emphasises the value of both the polymerase chain reaction and microscopy in the identification of avian haemosporidian parasites... - Two new Trypanosoma species from African birds, with notes on the taxonomy of avian trypanosomesGediminas Valkiunas
Institute of Ecology, Nature Research Centre, Akademijos 2, LT 08412 Vilnius, Lithuania
J Parasitol 97:924-30. 2011.... - New malaria parasites of the subgenus Novyella in African rainforest birds, with remarks on their high prevalence, classification and diagnosticsGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, 08412, Lithuania
Parasitol Res 104:1061-77. 2009..This study emphasises the importance of employing both PCR-based and microscopic methods in taxonomic, ecological and evolutionary investigations of avian haemosporidian parasites... - A new Haemoproteus species (Haemosporida: Haemoproteidae) from the endemic Galapagos dove Zenaida galapagoensis, with remarks on the parasite distribution, vectors, and molecular diagnosticsGediminas Valkiunas
Institute of Ecology, Nature Research Centre, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Parasitol 96:783-92. 2010..We point to the need of using both morphology and gene markers in studies of hemosporidian parasites, particularly in wildlife... - Nested cytochrome B polymerase chain reaction diagnostics detect sporozoites of hemosporidian parasites in peripheral blood of naturally infected birdsGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, Lithuania
J Parasitol 95:1512-5. 2009..The present study emphasizes the crucial need for a synthesis of information provided by the tools of traditional parasitology and molecular biology, particularly in field studies of blood parasites... - Identification of Leucocytozoon toddi group (Haemosporida: Leucocytozoidae), with remarks on the species taxonomy of leucocytozoidsGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Parasitol 96:170-7. 2010..toddi; additional morphospecies can be added to this group in the future. It is probable that some other morphospecies of Leucocytozoon also might be groups of closely related species... - Molecular phylogenetic analysis of circumnuclear hemoproteids (Haemosporida: Haemoproteidae) of sylviid birds, with a description of Haemoproteus parabelopolskyi sp. novGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, LT 08412 Vilnius, Lithuania
J Parasitol 93:680-7. 2007..This study establishes the value of both PCR and morphology in identification of avian hemoproteids... - Detrimental effects of Haemoproteus infections on the survival of biting midge Culicoides impunctatus (Diptera: Ceratopogonidae)Gediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, LT 2600 Vilnius, Lithuania
J Parasitol 90:194-6. 2004..impunctatus. The mortality rates of the infected flies were highest for days 1-2 and 3-4 PF, indicating possible negative effects of ookinetes and early oocysts on the vector... - The transmission of Haemoproteus belopolskyi (Haemosporida: Haemoproteidae) of blackcap by Culicoides impunctatus (Diptera: Ceratopogonidae)Gediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, LT 2600 Vilnius, Lithuania
J Parasitol 90:196-8. 2004..9 and 16% of erythrocytes in different experimental hosts. Culicoides impunctatus is an experimental vector of H. belopolskyi. It is likely to be the important natural vector of Haemoproteus spp. of passerine birds in Europe... - Factors affecting the relapse of Haemoproteus belopolskyi infections and the parasitaemia of Trypanosoma spp. in a naturally infected European songbird, the blackcap, Sylvia atricapillaGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, 2600 Vilnius, Lithuania
Parasitol Res 93:218-22. 2004..The relapse of avian Haemoproteus spp. infection and of the parasitaemia of avian Trypanosoma spp. may be related to gonadal hormones, corticosterone and melatonin... - Paucity of hematozoa in Colombian birdsGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius, LT 2600, Lithuania
J Wildl Dis 39:445-8. 2003..All hemosporidian infections encountered were of low intensity (< 1% of infected erythrocytes). The low prevalences and intensities of hemosporidian parasites in this study are in accord with other records from the Neotropics... - Further observations on the blood parasites of birds in UgandaGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Wildl Dis 41:580-7. 2005..Eighty-one were at the generic and 31 at the specific level of the hematozoa. Hepatozoon and Atoxoplasma spp. were detected for the first time in Uganda... - Nested cytochrome b polymerase chain reaction diagnostics underestimate mixed infections of avian blood haemosporidian parasites: microscopy is still essentialGediminas Valkiunas
Institute of Ecology, Vilnius University, Vilnius 21, LT 08412, Lithuania
J Parasitol 92:418-22. 2006..Specific primers for Haemoproteus spp. and Plasmodium spp. should be developed. Ideally, a combination of the approaches of both microscopy and PCR-based methods is recommended for this purpose... - Effect of Haemoproteus belopolskyi (Haemosporida: Haemoproteidae) on body mass of the blackcap Sylvia atricapillaGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, LT 08412 Vilnius, Lithuania
J Parasitol 92:1123-5. 2006..Clinical symptoms of the infection were not recorded. All birds from both groups survived until the end of the experiment... - Linkage between mitochondrial cytochrome b lineages and morphospecies of two avian malaria parasites, with a description of Plasmodium (Novyella) ashfordi sp. novGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
Parasitol Res 100:1311-22. 2007..Other lineages closely related to P. ashfordi and P. relictum are identified. This study establishes the value of PCR-based identification of avian malaria parasites... - Haemoproteus cyanomitrae sp. nov. (Haemosporida: Haemoproteidae) from a widespread African songbird, the olive sunbird, Cyanomitra olivaceaTatjana A Iezhova
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Parasitol 96:137-43. 2010..It is probable that H. cyanomitrae is transmitted throughout the range of the olive sunbird in Africa... - A comparative analysis of microscopy and PCR-based detection methods for blood parasitesGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Parasitol 94:1395-401. 2008..Presently, different PCR protocols must be used for the detection of parasites belonging to different genera; this is expensive and time-consuming... - Molecular phylogenetic and morphological analysis of haemosporidian parasites (Haemosporida) in a naturally infected European songbird, the blackcap Sylvia atricapilla, with description of Haemoproteus pallidulus sp. novAsta Krizanauskiene
Institute of Ecology, Vilnius University, Akademijos 2, LT 08412 Vilnius, Lithuania
Parasitology 137:217-27. 2010.... - Variation in host specificity between species of avian hemosporidian parasites: evidence from parasite morphology and cytochrome B gene sequencesAsta Krizanauskiene
Institute of Ecology, Vilnius University, Akademijos 2, LT 08412 Vilnius, Lithuania
J Parasitol 92:1319-24. 2006..The natural host range is thus not a reliable taxonomic character in the systematics of these parasites in the form in which it is still accepted in some recent taxonomic studies... - New avian Haemoproteus species (Haemosporida: Haemoproteidae) from African birds, with a critique of the use of host taxonomic information in hemoproteid classificationTatjana A Iezhova
Institute of Ecology, Nature Research Centre, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Parasitol 97:682-94. 2011..Development of bar-coding techniques remains essential in taxonomic and field studies of hemosporidian parasites... - Plasmodium relictum (lineages pSGS1 and pGRW11): complete synchronous sporogony in mosquitoes Culex pipiens pipiensRita Kazlauskienė
Nature Research Centre, Akademijos 2, Vilnius 2100, LT 08412, Lithuania
Exp Parasitol 133:454-61. 2013..relictum are similar indicating that phylogenetic trees based on the cyt b gene likely can be used for predicting sporogonic development of genetically similar avian malaria lineages in mosquito vectors... - A new method for isolation of purified genomic DNA from haemosporidian parasites inhabiting nucleated red blood cellsVaidas Palinauskas
Nature Research Centre, Akademijos 2, Vilnius LT 08412, Lithuania
Exp Parasitol 133:275-80. 2013.... - Hippoboscid-transmitted Haemoproteus parasites (Haemosporida) infect Galapagos Pelecaniform birds: evidence from molecular and morphological studies, with a description of Haemoproteus iwaIris I Levin
University of Missouri St Louis, Department of Biology and Whitney R Harris World Ecology Center, 1 University Blvd, St Louis, MO 63121, USA
Int J Parasitol 41:1019-27. 2011..This study shows that hippoboscid flies warrant more attention as vectors of avian Haemoproteus spp., particularly in marine and coastal environments... - Laser microdissection microscopy and single cell PCR of avian hemosporidiansVaidas Palinauskas
Institute of Ecology, Vilnius University, Vilnius, Lithuania
J Parasitol 96:420-4. 2010..This method can be used in the molecular investigation of blood parasites of birds, reptiles, and fish because it enables removing the parasite DNA from the overpowering host DNA, which is present in red blood cells... - Plasmodium relictum (lineage P-SGS1): effects on experimentally infected passerine birdsVaidas Palinauskas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 2100, LT 08412 Vilnius, Lithuania
Exp Parasitol 120:372-80. 2008..relictum causes diseases of different severity in different avian hosts; that might have different evolutionary consequences and should be taken in consideration in conservation projects... - In vitro hybridization of Haemoproteus spp.: an experimental approach for direct investigation of reproductive isolation of parasitesGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Parasitol 94:1385-94. 2008..Such experimental research can be used to reconcile molecular and morphological data and to define biological species for this group of parasites... - Plasmodium relictum (lineage P-SGS1): Further observation of effects on experimentally infected passeriform birds, with remarks on treatment with MalaroneVaidas Palinauskas
Institute of Ecology, Vilnius University, Akademijos, Lithuania
Exp Parasitol 123:134-9. 2009..The cure with Malarone was highly efficient for blood stages of P. relictum, but exoerythrocytic stages were unaffected... - Patterns of parasite abundance and distribution in island populations of Galápagos endemic birdsDiego Santiago-Alarcon
Department of Biology, University of Missouri St Louis and Whitney R Harris World Ecology Center, St Louis, Missouri 63121, USA
J Parasitol 94:584-90. 2008..Prevalence (up to 100%) and infection intensity (parasitemias up to 12.7%) of Haemoproteus sp. parasites varied little across island populations... - Vertebrate host specificity of two avian malaria parasites of the subgenus Novyella: Plasmodium nucleophilum and Plasmodium vaughaniTatjana A Iezhova
Institute of Ecology, Vilnius University, Akademijos 2, LT 2600 Vilnius, Lithuania
J Parasitol 91:472-4. 2005..nucleophilum and P. vaughani, which are characterized by a wide, but selective, range of avian hosts. Two new host-parasite associations were recorded... - Plasmodium relictum (lineage SGS1) and Plasmodium ashfordi (lineage GRW2): the effects of the co-infection on experimentally infected passerine birdsVaidas Palinauskas
Nature Research Centre, Akademijos 2, Vilnius 2100, LT 08412, Lithuania
Exp Parasitol 127:527-33. 2011..Mortality was recorded among infected crossbills. We conclude that co-infections of P. relictum and P. ashfordi are highly virulent and act synergetically during primary infections in some but not all passerine birds... - Additional observations on blood parasites of birds in Costa RicaGediminas Valkiunas
Institute of Ecology, Vilnius University, Akademijos 2, Vilnius 21, LT 08412, Lithuania
J Wildl Dis 40:555-61. 2004..6%), Leucocytozoon (0.3%), Trypanosoma (2.0%), and microfilariae (7.6%) were recorded. Twelve species of birds in this survey were examined for blood parasites for the first time. Several new host-parasite associations were identified... - Complete development of three species of Haemoproteus (Haemosporida, Haemoproteidae) in the biting midge Culicoides impunctatus (Diptera, Ceratopogonidae)Gediminas Valkiunas
Institute of Ecology, Vilnius, Lithuania
J Parasitol 88:864-8. 2002..Morphological features of the ookinetes, oocysts, and sporozoites should be given more prominence in the description of new species of hemoproteids... - Leucocytozoon hamiltoni n. sp. (Haemosporida, Leucocytozoidae) from the Bukharan great tit Parus bokharensisGediminas Valkiunas
Institute of Ecology, Vilnius, Lithuania
J Parasitol 88:577-81. 2002..This species appears to be restricted with respect to geography and host...