Research Topics
| O HellgrenSummaryAffiliation: Lund University Country: Sweden Publications
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Detail Information
Publications
Locus-specific protocol for nine different innate immune genes (antimicrobial peptides: ?-defensins) across passerine bird species reveals within-species coding variation and a case of trans-species polymorphismsO Hellgren
Department of Zoology, Edward Grey Institute, South Parks Road, Oxford OX1 3PS, UK
Mol Ecol Resour 11:686-92. 2011....- Bird hosts, blood parasites and their vectors--associations uncovered by molecular analyses of blackfly blood mealsO Hellgren
Department of Animal Ecology, Ecology Building, Lund University, SE 22362 Lund, Sweden
Mol Ecol 17:1605-13. 2008.... - Detecting shifts of transmission areas in avian blood parasites: a phylogenetic approachOlof Hellgren
Department of Animal Ecology, Ecology Building, Lund University, SE 22362 Lund, Sweden
Mol Ecol 16:1281-90. 2007.... - Evolution of a cluster of innate immune genes (beta-defensins) along the ancestral lines of chicken and zebra finchOlof Hellgren
Edward Grey Institute, Department of Zoology, South Parks Road, Oxford, OX1 3PS, UK
Immunome Res 6:3. 2010..After the duplication events, the duplicated genes have been subject to a relaxed selection pressure compared to the non-duplicated genes, thus supporting models of evolution by gene duplication... - In vitro tests of natural allelic variation of innate immune genes (avian ?-defensins) reveal functional differences in microbial inhibitionO Hellgren
Department of Zoology, Edward Grey Institute, University of Oxford, Oxford, UK
J Evol Biol 23:2726-30. 2010..Our data demonstrate functional allelic variation in natural defensin genes, and we discuss how differences in efficacy against microbial species might contribute to maintaining this variation... - A new PCR assay for simultaneous studies of Leucocytozoon, Plasmodium, and Haemoproteus from avian bloodOlof Hellgren
Department of Animal Ecology, Ecology Building, Lund University, SE 22362 Lund, Sweden
J Parasitol 90:797-802. 2004..Although only a small number of different bird species were investigated (6 passerine species), we found 22 different parasite species lineages (4 Haemoproteus, 8 Plasmodium, and 10 Leucocytozoon)... - Within-host speciation of malaria parasitesJavier Pérez-Tris
Department of Animal Ecology, Lund University, Lund, Sweden
PLoS ONE 2:e235. 2007..Strict sympatric speciation would involve parasite lineages diverging within a single host species, without any population subdivision... - Linkage between nuclear and mitochondrial DNA sequences in avian malaria parasites: multiple cases of cryptic speciation?Staffan Bensch
Department of Animal Ecology, Ecology Building, S 223 62 Lund, Sweden
Evolution 58:1617-21. 2004..Studies examining parasite virulence and host immune systems must consider this remarkable diversity of avian malaria parasites... - Diversity and phylogeny of mitochondrial cytochrome B lineages from six morphospecies of avian Haemoproteus (Haemosporida: Haemoproteidae)Olof Hellgren
Department of Animal Ecology, Ecology Building, Lund University, SE 22362 Lund, Sweden
J Parasitol 93:889-96. 2007..We, therefore, propose the use of a cyt. b fragment of this length as a standard gene fragment for a DNA bar-coding system for avian Haemoproteus species... - The genetic structure of Borrelia afzelii varies with geographic but not ecological sampling scaleO Hellgren
Department of Animal Ecology, Lund University, Lund, Sweden
J Evol Biol 24:159-67. 2011..In contrast, there was no effect of ecological sampling scale on LD. Strong LD may impede the rate of adaptive evolution. Our results suggest this effect might be particularly strong at a small geographic scale... - A jack-of-all-trades and still a master of some: prevalence and host range in avian malaria and related blood parasitesOlof Hellgren
Department of Animal Ecology, Ecology Building, Lund University, SE 22362 Lund, Sweden
Ecology 90:2840-9. 2009..Overall, these results show that parasites with the ability to successfully infect a wide variety of host species of broad ancestry also can have the ability to be the most prevalent in single host species... - Parallelism and historical contingency during rapid ecotype divergence in an isopodF Eroukhmanoff
Section for Animal Ecology, Lund University, Lund, Sweden
J Evol Biol 22:1098-1110. 2009..Phenotype sorting during colonization and strong divergent selection might have contributed to these rapid changes. Consequently, phenotypic divergence was only weakly influenced by historical contingency... - Flight speeds among bird species: allometric and phylogenetic effectsThomas Alerstam
Department of Animal Ecology, Lund University, Lund, Sweden
PLoS Biol 5:e197. 2007.... - A cautionary note on the use of nested PCR for parasite screening--an example from avian blood parasitesEszter Szöllsi
Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eotvos Lorand University, Pazmany Peter setany 1 C, 1117 Budapest, Hungary
J Parasitol 94:562-4. 2008..sequencing is essential. More generally, in order to limit this type of problem with nested PCR protocols, we suggest that the first and the second primer pair be chosen so that they have different annealing temperatures... - 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... - 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... - 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... - 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... - Vertebrate host specificity of wild-caught blackflies revealed by mitochondrial DNA in bloodBjörn Malmqvist
Department of Ecology and Environmental Science, Umea University, SE 90187 Umea, Sweden
Proc Biol Sci 271:S152-5. 2004..Such information is of vital interest in studies of disease transmission, coevolutionary relationships, population ecology and wildlife management...