Zain Kassam

8.7k total citations · 3 hit papers
135 papers, 5.4k citations indexed

About

Zain Kassam is a scholar working on Infectious Diseases, Epidemiology and Molecular Biology. According to data from OpenAlex, Zain Kassam has authored 135 papers receiving a total of 5.4k indexed citations (citations by other indexed papers that have themselves been cited), including 101 papers in Infectious Diseases, 56 papers in Epidemiology and 54 papers in Molecular Biology. Recurrent topics in Zain Kassam's work include Clostridium difficile and Clostridium perfringens research (101 papers), Gut microbiota and health (53 papers) and Microscopic Colitis (47 papers). Zain Kassam is often cited by papers focused on Clostridium difficile and Clostridium perfringens research (101 papers), Gut microbiota and health (53 papers) and Microscopic Colitis (47 papers). Zain Kassam collaborates with scholars based in United States, Canada and United Kingdom. Zain Kassam's co-authors include Christine H. Lee, Yuhong Yuan, Richard H. Hunt, Jessica R. Allegretti, Paul Moayyedi, David Armstrong, John K. Marshall, Michael G. Surette, Josie Libertucci and Walter Reinisch and has published in prestigious journals such as New England Journal of Medicine, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

Zain Kassam

130 papers receiving 5.3k 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.

Fecal Microbiota Transplantation Induces Remission in Patients With Active Ulcerative Colitis in a Randomized Controlled Trial

2015 1.1k citations David Armstrong, Zain Kassam et al. profile →
Fecal Microbiota Transplantation for Clostridium difficile Infection: Systematic Review and Meta-Analysis

2013 700 citations Zain Kassam, Christine H. Lee et al. The American Journal of Gastroenterology profile →
Fecal microbiota transplant from a rational stool donor improves hepatic encephalopathy: A randomized clinical trial

2017 439 citations Zain Kassam, Mark Smith et al. profile →

Peers

Zain Kassam

EPIDE

GASTR

SURGE

Jessica R. Allegretti United States

Dina Kao Canada

Sahil Khanna United States

Colleen Kelly United States

Benjamin H. Mullish United Kingdom

Kevin P. Rioux Canada

Josbert J. Keller Netherlands

Christine H. Lee Canada

Mohammed Nabil Quraishi United Kingdom

Sudarshan Paramsothy Australia

Jessica R. Allegretti United States

Zain Kassam

2.2k ×0.6

1.6k ×0.5

1.7k ×0.8

EPIDE

941 ×0.6

GASTR

834 ×0.7

SURGE

Citations per year, relative to Zain Kassam Zain Kassam (= 1×) peers Jessica R. Allegretti

Countries citing papers authored by Zain Kassam

Since Specialization

Citations

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

Fields of papers citing papers by Zain Kassam

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Zain Kassam

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

Feuerstadt, Paul, et al.. (2026). Multi-Species Synbiotic Supplementation After Antibiotics Promotes Recovery of Microbial Diversity and Function, and Increases Gut Barrier Integrity: A Randomized, Placebo-Controlled Trial. Antibiotics. 15(2). 138–138.

Smith, Byron J., Yvette M. Piceno, Martin Zydek, et al.. (2022). Strain-resolved analysis in a randomized trial of antibiotic pretreatment and maintenance dose delivery mode with fecal microbiota transplant for ulcerative colitis. Scientific Reports. 12(1). 5517–5517. 28 indexed citations

Zhu, Jinyi, Thomas R. McCarty, Zain Kassam, et al.. (2021). Cost‐effectiveness analysis of sequential fecal microbiota transplantation for fulminant Clostridioides difficile infection. Journal of Gastroenterology and Hepatology. 36(9). 2432–2440. 6 indexed citations

Santiago, Marina, Jessica R. Allegretti, Olga C. Aroniadis, et al.. (2019). Microbiome predictors of dysbiosis and VRE decolonization in patients with recurrent C. difficile infections in a multi-center retrospective study. PMC. 3 indexed citations

Aroniadis, Olga C., Lawrence J. Brandt, Caterina Oneto, et al.. (2019). Faecal microbiota transplantation for diarrhoea-predominant irritable bowel syndrome: a double-blind, randomised, placebo-controlled trial. The Lancet. Gastroenterology & hepatology. 4(9). 675–685. 102 indexed citations

Adler, Elizabeth M., et al.. (2019). Capsule-Delivered Fecal Microbiota Transplant Is Safe and Well Tolerated in Patients with Ulcerative Colitis. Digestive Diseases and Sciences. 64(9). 2452–2454. 16 indexed citations

Santiago, Marina, Jessica R. Allegretti, Olga C. Aroniadis, et al.. (2019). Microbiome predictors of dysbiosis and VRE decolonization in patients with recurrent <em>C. difficile</em> infections in a multi-center retrospective study. AIMS Microbiology. 5(1). 1–18. 14 indexed citations

Piceno, Yvette M., Douglas Fadrosh, Kole Lynch, et al.. (2019). Fecal microbiota transplant for Crohn disease: A study evaluating safety, efficacy, and microbiome profile. United European Gastroenterology Journal. 7(6). 807–814. 53 indexed citations

Herfarth, Hans, Edward L. Barnes, Millie D. Long, et al.. (2019). Combined Endoscopic and Oral Fecal Microbiota Transplantation in Patients with Antibiotic-Dependent Pouchitis: Low Clinical Efficacy due to Low Donor Microbial Engraftment. Inflammatory Intestinal Diseases. 4(1). 1–6. 56 indexed citations

10.

Ibraheim, Hajir, Chiara Giacomini, Zain Kassam, Francesco Dazzi, & Nick Powell. (2017). Advances in mesenchymal stromal cell therapy in the management of Crohn’s disease. Expert Review of Gastroenterology & Hepatology. 12(2). 141–153. 17 indexed citations

11.

Allegretti, Jessica R., Andrew S. Allegretti, Emmalee Phelps, et al.. (2017). Asymptomatic Clostridium difficile carriage rate post-fecal microbiota transplant is low: a prospective clinical and stool assessment. Clinical Microbiology and Infection. 24(7). 780.e1–780.e3. 12 indexed citations

12.

Allegretti, Jessica R., et al.. (2017). Early Antibiotic Use After Fecal Microbiota Transplantation Increases Risk of Treatment Failure. Clinical Infectious Diseases. 66(1). 134–135. 38 indexed citations

13.

Allegretti, Jessica R., et al.. (2017). The Current Landscape and Lessons from Fecal Microbiota Transplantation for Inflammatory Bowel Disease. Inflammatory Bowel Diseases. 23(10). 1710–1717. 40 indexed citations

14.

Kassam, Zain, Christine H. Lee, & Richard H. Hunt. (2014). Review of the Emerging Treatment of Clostridium difficile Infection with Fecal Microbiota Transplantation and Insights into Future Challenges. Clinics in Laboratory Medicine. 34(4). 787–798. 27 indexed citations

15.

Kassam, Zain, et al.. (2014). The outcome and long-term follow-up of 94 patients with recurrent and refractory Clostridium difficile infection using single to multiple fecal microbiota transplantation via retention enema. European Journal of Clinical Microbiology & Infectious Diseases. 33(8). 1425–1428. 83 indexed citations

16.

Kassam, Zain, Sara Belga, Idan Roifman, et al.. (2014). Inflammatory Bowel Disease Cause-specific Mortality. Inflammatory Bowel Diseases. 20(12). 2483–2492. 43 indexed citations

17.

Kassam, Zain, Christine H. Lee, Yuhong Yuan, & Richard H. Hunt. (2013). Fecal Microbiota Transplantation for Clostridium difficile Infection: Systematic Review and Meta-Analysis. The American Journal of Gastroenterology. 108(4). 500–508. 700 indexed citations breakdown →

18.

Kassam, Zain, et al.. (2013). Epidemiology and Risk Factors for Bloodstream Infections in a Home Parenteral Nutrition Program. Journal of Parenteral and Enteral Nutrition. 39(2). 147–153. 22 indexed citations

19.

Collins, Stephen M., Zain Kassam, & Přemysl Berčík. (2013). The adoptive transfer of behavioral phenotype via the intestinal microbiota: experimental evidence and clinical implications. Current Opinion in Microbiology. 16(3). 240–245. 161 indexed citations

20.

Kassam, Zain, et al.. (2013). A presentation of latent tropical sprue in a Canadian hospital. European Journal of Gastroenterology & Hepatology. 25(8). 996–1000. 2 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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