Calum Johnston

477 total citations
14 papers, 346 citations indexed

About

Calum Johnston is a scholar working on Epidemiology, Molecular Biology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Calum Johnston has authored 14 papers receiving a total of 346 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Epidemiology, 3 papers in Molecular Biology and 3 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Calum Johnston's work include Pneumonia and Respiratory Infections (10 papers), Respiratory viral infections research (3 papers) and Bacterial Genetics and Biotechnology (3 papers). Calum Johnston is often cited by papers focused on Pneumonia and Respiratory Infections (10 papers), Respiratory viral infections research (3 papers) and Bacterial Genetics and Biotechnology (3 papers). Calum Johnston collaborates with scholars based in France, United Kingdom and Switzerland. Calum Johnston's co-authors include Patrice Polard, Timothy J. Mitchell, A. Gordon Smith, Matthieu Bergé, Jean‐Pierre Claverys, Nathalie Campo, Jason Hinds, Johanna M. Jefferies, Johan Van Eldere and Lea‐Ann S. Kirkham and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Nature Communications and Journal of Bacteriology.

In The Last Decade

Calum Johnston

13 papers receiving 337 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Calum Johnston France 10 222 111 105 87 50 14 346
Rieza Aprianto Netherlands 7 254 1.1× 75 0.7× 118 1.1× 130 1.5× 42 0.8× 8 386
Kyle A. Murrah United States 9 184 0.8× 38 0.3× 142 1.4× 173 2.0× 40 0.8× 9 421
Eduardo A. Ayala United States 8 89 0.4× 96 0.9× 86 0.8× 210 2.4× 59 1.2× 8 388
Antonia C. Perez United States 9 181 0.8× 28 0.3× 120 1.1× 109 1.3× 26 0.5× 11 346
Laura Masala Italy 10 259 1.2× 215 1.9× 119 1.1× 159 1.8× 80 1.6× 12 518
Satsuki Kato Japan 9 83 0.4× 94 0.8× 164 1.6× 144 1.7× 27 0.5× 14 405
Zachary N. Phillips Australia 9 58 0.3× 64 0.6× 65 0.6× 84 1.0× 34 0.7× 14 216
Dabin Ren United States 12 153 0.7× 21 0.2× 126 1.2× 69 0.8× 39 0.8× 21 319
David C. I. Hung Canada 5 121 0.5× 203 1.8× 57 0.5× 231 2.7× 86 1.7× 5 466
Jurgen R. Piet Netherlands 8 158 0.7× 26 0.2× 211 2.0× 42 0.5× 36 0.7× 10 293

Countries citing papers authored by Calum Johnston

Since Specialization
Citations

This map shows the geographic impact of Calum Johnston'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 Calum Johnston with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Calum Johnston more than expected).

Fields of papers citing papers by Calum Johnston

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Calum Johnston. 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 Calum Johnston. The network helps show where Calum Johnston may publish in the future.

Co-authorship network of co-authors of Calum Johnston

This figure shows the co-authorship network connecting the top 25 collaborators of Calum Johnston. A scholar is included among the top collaborators of Calum Johnston 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 Calum Johnston. Calum Johnston is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

14 of 14 papers shown
1.
Prudhomme, Marc, et al.. (2024). Pneumococcal competence is a populational health sensor driving multilevel heterogeneity in response to antibiotics. Nature Communications. 15(1). 5625–5625. 7 indexed citations
2.
Soulet, Anne‐Lise, et al.. (2024). Competence induction of homologous recombination genes protects pneumococcal cells from genotoxic stress. mBio. 16(1). e0314224–e0314224. 2 indexed citations
3.
Johnston, Calum, et al.. (2023). The RecA-directed recombination pathway of natural transformation initiates at chromosomal replication forks in the pneumococcus. Proceedings of the National Academy of Sciences. 120(8). e2213867120–e2213867120. 4 indexed citations
4.
5.
Croix, Megan De Ste, Irene Vacca, Ana Sousa Manso, et al.. (2019). Recombination of the Phase-Variable spnIII Locus Is Independent of All Known Pneumococcal Site-Specific Recombinases. Journal of Bacteriology. 201(15). 16 indexed citations
6.
Johnston, Calum, Nathalie Campo, Matthieu Bergé, Patrice Polard, & Jean‐Pierre Claverys. (2014). Streptococcus pneumoniae, le transformiste. Trends in Microbiology. 22(3). 113–119. 57 indexed citations
7.
Smith, Andrew, Calum Johnston, Donald Inverarity, et al.. (2014). Investigating the role of pneumococcal neuraminidase A activity in isolates from pneumococcal haemolytic uraemic syndrome. Journal of Medical Microbiology. 63(4). 625–625. 1 indexed citations
8.
Johnston, Calum, Aldert Zomer, Hester J. Bootsma, et al.. (2013). Natural Genetic Transformation Generates a Population of Merodiploids in Streptococcus pneumoniae. PLoS Genetics. 9(9). e1003819–e1003819. 17 indexed citations
9.
Johnston, Calum, Patrice Polard, & J.P. Claverys. (2013). The DpnI/DpnII pneumococcal system, defense against foreign attack without compromising genetic exchange. Mobile Genetic Elements. 3(4). e25582–e25582. 27 indexed citations
10.
Johnston, Calum, et al.. (2013). Postreplication targeting of transformants by bacterial immune systems?. Trends in Microbiology. 21(10). 516–521. 15 indexed citations
11.
Smith, Andrew, Calum Johnston, Donald Inverarity, et al.. (2013). Investigating the role of pneumococcal neuraminidase A activity in isolates from pneumococcal haemolytic uraemic syndrome. Journal of Medical Microbiology. 62(11). 1735–1742. 18 indexed citations
12.
Johnston, Calum, Jason Hinds, A. Gordon Smith, et al.. (2010). Detection of Large Numbers of Pneumococcal Virulence Genes in Streptococci of the Mitis Group. Journal of Clinical Microbiology. 48(8). 2762–2769. 65 indexed citations
13.
Jefferies, Johanna M., Calum Johnston, Lea‐Ann S. Kirkham, et al.. (2007). Presence of Nonhemolytic Pneumolysin in Serotypes ofStreptococcus pneumoniaeAssociated with Disease Outbreaks. The Journal of Infectious Diseases. 196(6). 936–944. 76 indexed citations
14.
Jefferies, Johanna M., et al.. (2006). Identification of a Secreted Cholesterol-Dependent Cytolysin (Mitilysin) from Streptococcus mitis. Journal of Bacteriology. 189(2). 627–632. 31 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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2026