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Open research questions in Bird parasitology and diseases

128 gap statements mined from Bird parasitology and diseases papers in our 4.5M-paper local library, which holds 577 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • One of the challenges is optimizing the arginine-to-lysine ratio in compound feeds for African catfish. Another challenge is ensuring the nutritional completeness of compound feeds, particularly in terms of amino acid composition. The study also highlights the challenge of balancing the needs of African catfish for different essential amino acids.

    GROWTH, MORPHOMETRIC AND HEMATOBIOCHEMICAL PARAMETERS OF AFRICAN CATFISH (Clarias gariepinus) AT DIFFERENT ARGININE-TO-LYSINE RATIOS IN COMPOUND FEEDS · 2026 · DOI

  • There is a need to investigate the optimal arginine-to-lysine ratio for African catfish growth and health. The current understanding of the role of arginine and lysine in African catfish nutrition is limited. The study aims to address this gap by examining the effect of different arginine-to-lysine ratios on African catfish.

    GROWTH, MORPHOMETRIC AND HEMATOBIOCHEMICAL PARAMETERS OF AFRICAN CATFISH (Clarias gariepinus) AT DIFFERENT ARGININE-TO-LYSINE RATIOS IN COMPOUND FEEDS · 2026 · DOI

  • The lack of detection of Plasmodium and Haemoproteus infection in resident birds of the CHBR prior to this study. The need to examine the prevalence and identify strains of avian malaria infection in the forest bird communities of the CHBR.

    First detection of avian malaria parasites Plasmodium and Haemoproteus in resident forest birds of cape horn biosphere reserve, Chile · 2026 · DOI

  • Systematic comparisons of virome composition and interspecific viral diversity across sympatric species remain lacking. Small sample sizes and incomplete viral coverage limit previous studies. The lack of baseline virome data for Antarctic pygoscelid penguins hinders long-term pathogen surveillance.

    Faecal Viromes of Three Sympatric Penguins on Ardley Island, Antarctica: A Transcriptomic Study Showing Limited Host-Species Effect · 2026 · DOI

  • One challenge identified is the difficulty in assessing the quantity of lice representing different age classes and sexes on a typical feral pigeon. Another challenge is the lack of information on the mortality risk associated with transmission for lice. The paper also notes the complexity of modeling the life cycle and transmission dynamics of the slender pigeon louse.

    To transmit or not to transmit, that is the question · 2026 · DOI

  • The diagnostic relevance of the Doppler blood flow profiles of parrots is not well known. There is a lack of knowledge about the correlation between the shape of the pulmonary Doppler blood flow profile and sonographic parameters in parrots with heart diseases.

    Shape of the Pulmonary Doppler Sonography Blood Flow Profile of the Congo Grey Parrot (Psittacus erithacus) and the Influence of Heart Disease · 2025 · DOI

  • The lack of prior research on Onchocercidae and Trypanosomatidae parasites made it difficult to develop effective methods for detecting and analyzing these parasites. The study had to overcome the challenge of collecting and analyzing data from a large number of bird species and individuals.

    Neglected Avian Blood Parasites (Onchocercidae and Trypanosomatidae) in Migratory Passerines of the Temperate Zone, Eastern Baltic Region · 2025 · DOI

  • The potential bias introduced by short sequence synonymies is not well understood. The occurrence of lineage synonymies in the MalAvi database is not well documented. The need for comprehensive data cleaning and lineage homologation before sequence analysis is highlighted.

    Imprudent use of MalAvi names biases the estimation of parasite diversity of avian haemosporidians · 2025 · DOI

  • Our findings highlight a previously overlooked threat to avian scavengers and suggest that global warming may further facilitate the spread of haemosporidian-infected vectors, underscoring the urgent need for targeted conservation measures and further research into parasite dynamics in vulnerable wild populations.

    Unraveling Occurrence Patterns and Diversity of Avian Malaria Parasites in Iberian Obligate and Facultative Scavenger Birds · 2026 · DOI

  • However, its occurrence in scavenger birds, particularly vulture species, remains poorly understood.

    Unraveling Occurrence Patterns and Diversity of Avian Malaria Parasites in Iberian Obligate and Facultative Scavenger Birds · 2026 · DOI

  • While the number of organelles per parasitic cell appears to be stable, the number of their nucleoids is not, but the dynamics and factors affecting them still remain to be elucidated.

    Genomic Content in Avian Haemosporidian Parasites Suggests Co‐Regulation of Apicoplast and Mitochondrial Nucleoids · 2026 · DOI

  • Avian malaria parasite prevalence and diversity in wild-caught mosquitoes remain poorly investigated compared to wild birds.

    Urbanization and Vector Species Shape Avian Malaria Prevalence in Mosquitoes · 2026 · DOI

  • The patterns of exo-erythrocytic development remain poorly understood for most described Haemoproteus parasites.

    Exo‐Erythrocytic Development of Haemoproteus belopolskyi (Haemosporida, Haemoproteidae) in the Type‐Vertebrate Host Hippolais icterina , With Remarks on Phenotypic Variation in Avian Haemoproteids · 2026 · DOI

  • The factors underlying the occurrence of these different tissue stages in certain Haemoproteus lineages remain unclear, emphasizing the need for further research on these parasites, which can cause severe disease in non-adapted avian hosts.

    Exo‐Erythrocytic Development of Haemoproteus belopolskyi (Haemosporida, Haemoproteidae) in the Type‐Vertebrate Host Hippolais icterina , With Remarks on Phenotypic Variation in Avian Haemoproteids · 2026 · DOI

  • The pathological significance of R. sternae infection is still poorly understood. The life cycle of R. sternae is not fully understood. There is a lack of reports on R. sternae infection in yellow-legged gulls in Italy.

    Reighardia sternae Infection and Associated Lesions in a Yellow-Legged Gull (Larus michahellis) in Italy · 2025 · DOI

  • Stressors that subtly yet persistently deplete energetic resources-such as heat, pollutants or parasites-are well studied in laboratory and clinical settings, where their physiological effects are often well understood, yet their influence on phenotypic and demographic traits in free-living populations remains critically understudied.

    Subtle stressors—Strong responses. Consistent negative effects of avian blood parasites on phenotypic and demographic traits across songbirds · 2025 · DOI

  • The effects of parasitism and temperature mainly were additive, with limited evidence that weather exacerbated the effects of parasitism.

    Fitness consequences of parasitism in a changing world: A case study with bird blow flies and sagebrush songbirds · 2025 · DOI

  • Potential interactions between parasitism and different stressors associated with environmental change, however, remain poorly understood for most systems.

    Fitness consequences of parasitism in a changing world: A case study with bird blow flies and sagebrush songbirds · 2025 · DOI

  • The study had a limited sample size of 223 birds, - The study was conducted over a limited time period from 2021 to 2023, - Not all birds sampled yielded usable blood smears or suitable blood samples for PCR analysis, - The study relied on microscopy and PCR-based genetic analyses which may not have detected all haemosporidian…

    First detection of avian malaria parasites Plasmodium and Haemoproteus in resident forest birds of cape horn biosphere reserve, Chile · 2026 · DOI

  • The parameter values are simplified to averages, thus their natural variability is neglected, - Some parameters are arbitrary due to unknown realistic values, - The model does not consider subsequent infestations from other…

    To transmit or not to transmit, that is the question · 2026 · DOI

  • Small sample size of canaries - Limited duration of the experiment (38 days) - No mention of controlling for other factors that could affect…

    Impact of Plasmodium relictum Infection on the Colonization Resistance of Bird Gut Microbiota: A Preliminary Study · 2024 · DOI

  • Investigating the long-term effects of P. relictum infection on bird gut microbiota - Studying the impact of P.

    Impact of Plasmodium relictum Infection on the Colonization Resistance of Bird Gut Microbiota: A Preliminary Study · 2024 · DOI

  • Samples were taken at different stages of infection, - No information about the developmental stage of most species is available, - The study remains to be cross-validated with in-situ imaging…

    Mitochondrial and apicoplast genome copy abundances of haemosporidian parasites are explained by host species and parasitic lineage · 2024 · DOI

  • Limited to two study sites, - Excluded multi-infected individuals when categorizing infection status for individual parasite genus, - Did not assess other potential factors influencing parasite…

    The impacts of host traits on parasite infection of montane birds in southwestern China · 2024 · DOI

  • Investigate other potential factors influencing parasite infection, - Expand study to more sites and species, - Examine the impact of parasite infection on host…

    The impacts of host traits on parasite infection of montane birds in southwestern China · 2024 · DOI

Most-cited papers in Bird parasitology and diseases

Most recent work

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Open questions raised by papers listed on this page include: (1) There is a need to investigate the optimal arginine-to-lysine ratio for African catfish growth and health (“GROWTH, MORPHOMETRIC AND HEMATOBIOCHEMICAL PARAMETERS OF AFRICAN CATFISH…”, 2026); (2) The lack of baseline virome data for Antarctic pygoscelid penguins hinders long-term pathogen surveillance (“Faecal Viromes of Three Sympatric Penguins on Ardley Island, Antarctica: A…”, 2026); (3) Another challenge is the lack of information on the mortality risk associated with transmission for lice (“To transmit or not to transmit, that is the question”, 2026); (4) Its occurrence in scavenger birds, particularly vulture species, remains poorly understood (“Unraveling Occurrence Patterns and Diversity of Avian Malaria Parasites in…”, 2026); (5) While the number of organelles per parasitic cell appears to be stable, the number of their nucleoids is not, but the dynamics and factors affecting them still remain to be elucidated (“Genomic Content in Avian Haemosporidian Parasites Suggests Co‐Regulation of…”, 2026). 128 gap statements have been mined from Bird parasitology and diseases papers in our 4.5M-paper local library, which holds 577 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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