J. Waldenström

Publications218
h-index52
Citations11,048
Highly Influential Citations810
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Global Patterns of Influenza A Virus in Wild Birds
TLDR
Current knowledge on global patterns of influenza virus infections in wild birds is reviewed, these patterns are discussed in the context of host ecology and in particular birds' behavior, and some important gaps in current knowledge are identified.
A NEW PCR ASSAY FOR SIMULTANEOUS STUDIES OF LEUCOCYTOZOON, PLASMODIUM, AND HAEMOPROTEUS FROM AVIAN BLOOD
TLDR
A new polymerase chain reaction (PCR) protocol is presented that enables simultaneous typing of species from the 3 most common avian blood parasite genera (Haemoproteus, Plasmodium, and Leucocytozoon) and provides an easy, rapid, and accurate method to separate and investigate these parasites within a blood sample.
Spatial, Temporal, and Species Variation in Prevalence of Influenza A Viruses in Wild Migratory Birds
TLDR
Temporal and spatial variation in influenza virus prevalence in wild birds was observed, with influenza A virus prevalence varying by sampling location; this is probably related to migration patterns from northeast to southwest and a higher prevalence farther north along the flyways.
A New Nested Polymerase Chain Reaction Method Very Efficient in Detecting Plasmodium and Haemoproteus Infections From Avian Blood
TLDR
This study presents a new nested PCR approach, building on a previously published PCR method, which has significantly improved performance and is shown to be superior detection of Plasmodium spp.
Cross‐species infection of blood parasites between resident and migratory songbirds in Africa
TLDR
The mix of areas of transmission in several branches of the phylogenetic tree suggests that transmission of haemosporidian parasites to songbirds has arisen repeatedly in Africa and Europe.
Prevalence of Campylobacter jejuni, Campylobacter lari, and Campylobacter coli in Different Ecological Guilds and Taxa of Migrating Birds
ABSTRACT A total of 1,794 migrating birds trapped at a coastal site in southern Sweden were sampled for detection of Campylobacter spp. All isolates phenotypically identified as Campylobacter jejuni…
Temporal dynamics and diversity of avian malaria parasites in a single host species.
TLDR
A remarkable diversity of parasite lineages are unraveled in a long-term population study of great reed warblers Acrocephalus arundinaceus that was not foreseen from traditional microscopic examination of blood smears, suggesting that knowledge of extrinsic parameters such as vector distribution and alternative hosts are required to understand these patterns.
Rapid Advance of Spring Arrival Dates in Long-Distance Migratory Birds
Several bird species have advanced the timing of their spring migration in response to recent climate change. European short-distance migrants, wintering in temperate areas, have been assumed to be…
Surveillance of Influenza Virus A in Migratory Waterfowl in Northern Europe
TLDR
Ducks may maintain influenza virus from 1 year to the next as long as the duck population does not change significantly.
Detecting shifts of transmission areas in avian blood parasites — a phylogenetic approach
TLDR
It is suggested that novel introductions of these parasites into resident bird faunas are rather rare evolutionary events because of a reduced transmission barrier of Plasmodium parasites, caused by their higher tendency to infect migratory bird species, which might facilitate shifting of transmission area.
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