Una Ryan

28.6k total citations · 6 hit papers
484 papers, 22.0k citations indexed

About

Una Ryan is a scholar working on Parasitology, Infectious Diseases and Molecular Biology. According to data from OpenAlex, Una Ryan has authored 484 papers receiving a total of 22.0k indexed citations (citations by other indexed papers that have themselves been cited), including 266 papers in Parasitology, 159 papers in Infectious Diseases and 74 papers in Molecular Biology. Recurrent topics in Una Ryan's work include Parasitic Infections and Diagnostics (206 papers), Amoebic Infections and Treatments (92 papers) and Coccidia and coccidiosis research (52 papers). Una Ryan is often cited by papers focused on Parasitic Infections and Diagnostics (206 papers), Amoebic Infections and Treatments (92 papers) and Coccidia and coccidiosis research (52 papers). Una Ryan collaborates with scholars based in Australia, United States and China. Una Ryan's co-authors include Lihua Xiao, Ronald Fayer, James W. Ryan, Simone M. Cacciò, Rongchang Yang, Alireza Zahedi, Yaoyu Feng, Peter Irwin, Nawal Hijjawi and Andrea Paparini and has published in prestigious journals such as Science, Proceedings of the National Academy of Sciences and Journal of Biological Chemistry.

In The Last Decade

Una Ryan

478 papers receiving 21.3k citations

Hit Papers

align trajectories sort by overperformance

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Cryptosporidium Taxonomy: Recent Advances and Implications for Public Health

2004 698 citations Lihua Xiao, Una Ryan et al. profile →
Cryptosporidiumspecies in humans and animals: current understanding and research needs

2014 506 citations Una Ryan, Lihua Xiao et al. profile →
Zoonotic potential of Giardia

2013 464 citations Una Ryan et al. International Journal for Parasitology profile →
Genetic Diversity and Population Structure of Cryptosporidium

2018 395 citations Yaoyu Feng, Una Ryan et al. Trends in Parasitology profile →
Taxonomy and molecular epidemiology of Cryptosporidium and Giardia – a 50 year perspective (1971–2021)

2021 234 citations Una Ryan, Yaoyu Feng et al. International Journal for Parasitology profile →
An Update on Zoonotic Cryptosporidium Species and Genotypes in Humans

2021 146 citations Una Ryan, Yaoyu Feng et al. profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Una Ryan	12.5k	8.6k	3.3k	1.7k	1.7k	484	22.0k
Merle S. Olson	3.7k 0.3×	3.3k 0.4×	5.3k 1.6×	592 0.4×	2.1k 1.3×	399	17.6k
Rick M. Maizels	12.4k 1.0×	6.2k 0.7×	4.0k 1.2×	673 0.4×	1.4k 0.8×	293	22.5k
Joseph F. Urban	8.2k 0.7×	3.7k 0.4×	4.1k 1.2×	806 0.5×	3.5k 2.1×	359	26.1k
A Capron	9.3k 0.7×	2.3k 0.3×	3.3k 1.0×	450 0.3×	1.3k 0.8×	598	21.4k
Wanderley de Souza	5.4k 0.4×	2.5k 0.3×	7.4k 2.2×	392 0.2×	363 0.2×	973	24.1k
Judith E. Allen	4.4k 0.4×	3.2k 0.4×	3.0k 0.9×	243 0.1×	1.4k 0.9×	185	16.4k
Moníque Capron	5.1k 0.4×	2.3k 0.3×	2.2k 0.6×	267 0.2×	2.1k 1.2×	318	16.2k
Edward J. Pearce	9.4k 0.7×	2.8k 0.3×	9.5k 2.9×	323 0.2×	1.7k 1.0×	227	36.1k
Harry Towbin	2.1k 0.2×	3.0k 0.3×	28.2k 8.4×	1.1k 0.6×	2.4k 1.4×	73	53.7k
Frank Brombacher	2.7k 0.2×	2.3k 0.3×	3.6k 1.1×	189 0.1×	1.8k 1.0×	286	22.0k

Countries citing papers authored by Una Ryan

Since Specialization

Citations

This map shows the geographic impact of Una Ryan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Una Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Una Ryan more than expected).

Fields of papers citing papers by Una Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Una Ryan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Una Ryan. The network helps show where Una Ryan may publish in the future.

Co-authorship network of co-authors of Una Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of Una Ryan. A scholar is included among the top collaborators of Una Ryan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Una Ryan. Una Ryan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Xiao, Lihua, Yaoyu Feng, Amanda Ash, et al.. (2025). Cryptosporidium in cattle: Assessing the zoonotic risk. Current Research in Parasitology and Vector-Borne Diseases. 8. 100279–100279. 2 indexed citations

Xiao, Lihua, et al.. (2025). Update on transmission of zoonotic Giardia in cattle. Trends in Parasitology. 41(3). 210–221.

Egan, Siobhon, Amanda Barbosa, Yaoyu Feng, Lihua Xiao, & Una Ryan. (2024). Rabbits as reservoirs: An updated perspective of the zoonotic risk from Cryptosporidium and Giardia. Veterinary Parasitology. 327. 110151–110151. 5 indexed citations

Chen, Haoyu, Mingming Huang, Na Li, et al.. (2023). Cryptosporidium equi n. sp. (Apicomplexa: Cryptosporidiidae): Biological and genetic characterisations. International Journal for Parasitology. 53(10). 545–554. 23 indexed citations

Li, Na, Yujin Huang, Weijian Wang, et al.. (2023). Longitudinal follow-up reveals occurrence of successive Cryptosporidium bovis and Cryptosporidium ryanae infections by different subtype families in dairy cattle. International Journal for Parasitology. 53(11-12). 651–661. 4 indexed citations

Egan, Siobhon, Amanda Barbosa, Yaoyu Feng, Lihua Xiao, & Una Ryan. (2023). The risk of wild birds contaminating source water with zoonotic Cryptosporidium and Giardia is probably overestimated. The Science of The Total Environment. 912. 169032–169032. 7 indexed citations

Ryan, Una, et al.. (2022). Detection of unusual Cryptosporidium parvum subtype in patients with gastrointestinal cancer in Egypt. Parasitology Research. 122(2). 597–606. 5 indexed citations

Robertson, Lucy J., C Graham Clark, John Debenham, et al.. (2019). Are molecular tools clarifying or confusing our understanding of the public health threat from zoonotic enteric protozoa in wildlife?. International Journal for Parasitology Parasites and Wildlife. 9. 323–341. 32 indexed citations

Squire, Sylvia Afriyie & Una Ryan. (2017). Cryptosporidium and Giardia in Africa: current and future challenges. Parasites & Vectors. 10(1). 195–195. 199 indexed citations

10.

Campbell, John P., Jennifer Heaney, Mark Cobbold, et al.. (2013). Validation of a rapid lateral-flow test for the diagnosis and monitoring of immunoglobulin free light chains: Retrospective analysis of sera from patients with plasma cell dyscrasias. Clinical Chemistry. 59(10). 1 indexed citations

11.

Kaewmongkol, Sarawan, Patricia A. Fleming, Peter J. Adams, et al.. (2011). Zoonotic Bartonella Species in Fleas and Blood from Red Foxes in Australia. Vector-Borne and Zoonotic Diseases. 11(12). 1549–1553. 21 indexed citations

12.

O’Brien, Emily C., Linda M. McInnes, & Una Ryan. (2007). Cryptosporidium GP60 genotypes from humans and domesticated animals in Australia, North America and Europe. Experimental Parasitology. 118(1). 118–121. 74 indexed citations

13.

Heyworth, Jane, et al.. (2006). Identifying the Presence of Cryptosporidium, Giardia, Campylobacter and Salmonella spp. in Private Rainwater Supplies. Environmental Health. 6(1). 53–59. 1 indexed citations

14.

Lemström, Karl, et al.. (2000). Blockade of Complement Inhibits Obliterative Bronchiolitis in Rat Tracheal Allografts. American Journal of Respiratory and Critical Care Medicine. 161(4). 1332–1339. 28 indexed citations

15.

Catravas, John D., Allan D. Callow, & Una Ryan. (1996). Vascular endothelium : responses to injury. Plenum Press eBooks. 4 indexed citations

16.

Catravas, John D., Allan D. Callow, & Una Ryan. (1991). Vascular endothelium : physiological basis of clinical problems II. Plenum Press eBooks. 11 indexed citations

17.

Vargas, Fernando F., et al.. (1990). Enzymatic Lysis of Sulfated Glycosaminoglycans Reduces the Electrophoretic Mobility of Vascular Endothelial Cells. PubMed. 9(2). 83–89. 6 indexed citations

18.

Varani, James, I. Ginsburg, Lucia Schuger, et al.. (1989). Endothelial cell killing by neutrophils. Synergistic interaction of oxygen products and proteases.. Europe PMC (PubMed Central). 135(3). 435–8. 159 indexed citations

19.

Ryan, Una. (1987). Pulmonary endothelium in health and disease. 17 indexed citations

20.

Ryan, Una, et al.. (1979). Endothelial cells and components of the kallikrein-kinin system.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 120B. 275–86. 4 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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