Samuel Ratnam

4.2k total citations · 2 hit papers
61 papers, 3.1k citations indexed

About

Samuel Ratnam is a scholar working on Epidemiology, Infectious Diseases and Molecular Biology. According to data from OpenAlex, Samuel Ratnam has authored 61 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 28 papers in Epidemiology, 24 papers in Infectious Diseases and 13 papers in Molecular Biology. Recurrent topics in Samuel Ratnam's work include Cervical Cancer and HPV Research (12 papers), Virology and Viral Diseases (10 papers) and Escherichia coli research studies (8 papers). Samuel Ratnam is often cited by papers focused on Cervical Cancer and HPV Research (12 papers), Virology and Viral Diseases (10 papers) and Escherichia coli research studies (8 papers). Samuel Ratnam collaborates with scholars based in Canada, United States and United Kingdom. Samuel Ratnam's co-authors include S B March, Chris J.L.M. Meijer, Philippe Birembaut, Anne Szarewski, Christine Clavel, Thomas Iftner, Shalini Kulasingam, Karl Ulrich Petry, Jack Cuzick and Peter Sasieni and has published in prestigious journals such as Journal of Biological Chemistry, Biochemical Journal and American Journal of Epidemiology.

In The Last Decade

Samuel Ratnam

60 papers receiving 2.9k citations

Hit Papers

align trajectories

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.

Overview of the European and North American studies on HPV testing in primary cervical cancer screening

2006 856 citations Jack Cuzick, Christine Clavel et al. International Journal of Cancer profile →
Sorbitol-MacConkey medium for detection of Escherichia coli O157:H7 associated with hemorrhagic colitis

1986 425 citations S B March, Samuel Ratnam Journal of Clinical Microbiology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Samuel Ratnam Canada	25	1.8k	809	691	576	516	61	3.1k
Rainer Laufs Germany	36	1.5k 0.9×	2.0k 2.4×	642 0.9×	249 0.4×	1.9k 3.7×	182	5.3k
James Brunton Canada	40	1.1k 0.6×	2.1k 2.5×	2.1k 3.0×	226 0.4×	875 1.7×	82	4.9k
Brita Bruun Denmark	27	1.0k 0.6×	788 1.0×	591 0.9×	86 0.1×	436 0.8×	99	2.6k
Kai Man Kam China	28	1.7k 1.0×	2.0k 2.4×	405 0.6×	760 1.3×	505 1.0×	82	3.1k
Sarah J. Dunstan Vietnam	32	1.0k 0.6×	1.7k 2.1×	365 0.5×	499 0.9×	597 1.2×	61	3.4k
Bryan Coburn Canada	29	655 0.4×	908 1.1×	844 1.2×	214 0.4×	1.3k 2.5×	82	3.7k
Gill Douce United Kingdom	38	941 0.5×	1.8k 2.2×	1.2k 1.8×	310 0.5×	984 1.9×	83	4.2k
Teresa Lagergård Sweden	37	2.4k 1.4×	675 0.8×	454 0.7×	196 0.3×	771 1.5×	126	4.8k
Jean‐Louis Gaillard France	43	3.5k 2.0×	2.8k 3.4×	416 0.6×	447 0.8×	984 1.9×	77	5.9k
Olivier Gaillot France	22	417 0.2×	564 0.7×	386 0.6×	174 0.3×	839 1.6×	45	2.3k

Countries citing papers authored by Samuel Ratnam

Since Specialization

Citations

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

Fields of papers citing papers by Samuel Ratnam

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Samuel Ratnam

This figure shows the co-authorship network connecting the top 25 collaborators of Samuel Ratnam. A scholar is included among the top collaborators of Samuel Ratnam 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 Samuel Ratnam. Samuel Ratnam 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

Godwin, Marshall, Samuel Ratnam, Lesa Dawson, et al.. (2015). Effect of vaginal self-sampling on cervical cancer screening rates: a community-based study in Newfoundland. BMC Women s Health. 15(1). 47–47. 31 indexed citations

Richardson, L, Mariam El‐Zein, Agnihotram V. Ramanakumar, et al.. (2015). HPV DNA testing with cytology triage in cervical cancer screening: Influence of revealing HPV infection status. Cancer Cytopathology. 123(12). 745–754. 37 indexed citations

Coutlée, François, Samuel Ratnam, Agnihotram V. Ramanakumar, et al.. (2011). Distribution of human papillomavirus genotypes in cervical intraepithelial neoplasia and invasive cervical cancer in Canada. Journal of Medical Virology. 83(6). 1034–1041. 63 indexed citations

Cuzick, Jack, Christine Clavel, Karl Ulrich Petry, et al.. (2006). Overview of the European and North American studies on HPV testing in primary cervical cancer screening. International Journal of Cancer. 119(5). 1095–1101. 856 indexed citations breakdown →

Natarajaseenivasan, Kalimuthusamy & Samuel Ratnam. (2001). Relative superiority of IgM + IgG combined conjugate plate ELISA for detection of anti leptospiral antibodies among different occupational groups. The Indian Journal of Animal Sciences. 71(12). 1142–1144. 1 indexed citations

Ahmad, Rafiq, Geoff Soule, Walter Demczuk, et al.. (2000). Epidemiologic Typing of Salmonella enterica Serotype Enteritidis in a Canada-Wide Outbreak of Gastroenteritis due to Contaminated Cheese. Journal of Clinical Microbiology. 38(6). 2403–2406. 47 indexed citations

Mossong, Joël, Christopher J. O’Callaghan, & Samuel Ratnam. (2000). Modelling antibody response to measles vaccine and subsequent waning of immunity in a low exposure population. Vaccine. 19(4-5). 523–529. 70 indexed citations

Ward, Brian J., et al.. (1999). Measurement of measles virus-specific neutralizing antibodies: evaluation of the syncytium inhibition assay in comparison with the plaque reduction neutralization test. Diagnostic Microbiology and Infectious Disease. 33(3). 147–152. 23 indexed citations

Meddings, Jonathan B., et al.. (1999). Modulation of host cell membrane fluidity: a novel mechanism for preventing bacterial adhesion. American Journal of Physiology-Gastrointestinal and Liver Physiology. 277(1). G201–G208. 17 indexed citations

10.

Ratnam, Samuel, et al.. (1998). Sequence Note : Molecular Epidemiological Analysis of Human Immunodeficiency Virus Type 1 in Newfoundland, Canada. AIDS Research and Human Retroviruses. 14(13). 1205–1209. 1 indexed citations

11.

Ratnam, Samuel, Roy West, Veeresh Gadag, Brett Williams, & Elizabeth Oates. (1996). Rubella Antibody Levels in School‐Aged Children in Newfoundland: Implications for a Two‐Dose Rubella Vaccination Strategy. Canadian Journal of Infectious Diseases and Medical Microbiology. 8(2). 85–88. 3 indexed citations

12.

Boulianne, Nicole, Gaston De Serres, Samuel Ratnam, et al.. (1995). Measles, mumps, and rubella antibodies in children 5–6 years after immunization: effect of vaccine type and age at vaccination. Vaccine. 13(16). 1611–1616. 60 indexed citations

13.

Ward, Brian J., Nicole Boulianne, Samuel Ratnam, et al.. (1995). Cellular Immunity in Measles Vaccine Failure: Demonstration of Measles Antigen-Specific Lymphoproliferative Responses despite Limited Serum Antibody Production after Revaccination. The Journal of Infectious Diseases. 172(6). 1591–1595. 92 indexed citations

14.

Patel, Thakor R., et al.. (1994). Occurrence of Listeria in hot and cold smoked seafood products. International Journal of Food Microbiology. 22(1). 73–77. 38 indexed citations

15.

Patel, Thakor R., et al.. (1992). Prevalence of Listeria in Smoked Fish. Journal of Food Protection. 55(11). 866–870. 31 indexed citations

16.

Chandrasekhar, Sanjay & Samuel Ratnam. (1992). Studies on cell-wall deficient non-acid fast variants of Mycobacterium tuberculosis. Tubercle and Lung Disease. 73(5). 273–279. 22 indexed citations

17.

Ratnam, Samuel, et al.. (1991). Heparin-binding serum protein(s) is required for the protection of sialyltransferase released during the incubation of rat jejunal slices. Biochemical Journal. 280(3). 687–693. 3 indexed citations

18.

Ratnam, Samuel, S B March, Rafiq Ahmed, G S Bezanson, & S. S. Kasatiya. (1988). Characterization of Escherichia coli serotype O157:H7. Journal of Clinical Microbiology. 26(10). 2006–2012. 155 indexed citations

19.

Ratnam, Samuel, et al.. (1985). Hemolytic-uremic syndrome associated with verotoxin-producing Escherichia coli.. Europe PMC (PubMed Central). 133(1). 37–8. 9 indexed citations

20.

Ratnam, Samuel & Sanjay Chandrasekhar. (1976). The pathogenicity of spheroplasts of Mycobacterium tuberculosis.. PubMed. 114(3). 549–54. 16 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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