Warish Ahmed

15.2k total citations · 2 hit papers
206 papers, 9.8k citations indexed

About

Warish Ahmed is a scholar working on Water Science and Technology, Infectious Diseases and Environmental Engineering. According to data from OpenAlex, Warish Ahmed has authored 206 papers receiving a total of 9.8k indexed citations (citations by other indexed papers that have themselves been cited), including 121 papers in Water Science and Technology, 90 papers in Infectious Diseases and 43 papers in Environmental Engineering. Recurrent topics in Warish Ahmed's work include Fecal contamination and water quality (120 papers), SARS-CoV-2 detection and testing (53 papers) and Viral gastroenteritis research and epidemiology (38 papers). Warish Ahmed is often cited by papers focused on Fecal contamination and water quality (120 papers), SARS-CoV-2 detection and testing (53 papers) and Viral gastroenteritis research and epidemiology (38 papers). Warish Ahmed collaborates with scholars based in Australia, United States and Japan. Warish Ahmed's co-authors include S. Toze, Masaaki Kitajima, Kyle Bibby, Aaron Bivins, Ted Gardner, Jatinder Sidhu, Kerry A. Hamilton, Stuart L. Simpson, Pradip Gyawali and Ashantha Goonetilleke and has published in prestigious journals such as SHILAP Revista de lepidopterología, Environmental Science & Technology and The Science of The Total Environment.

In The Last Decade

Warish Ahmed

197 papers receiving 9.6k 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.

First confirmed detection of SARS-CoV-2 in untreated wastewater in Australia: A proof of concept for the wastewater surveillance of COVID-19 in the community

2020 1.3k citations Warish Ahmed, Kyle Bibby et al. The Science of The Total Environment profile →
SARS-CoV-2 in wastewater: State of the knowledge and research needs

2020 556 citations Masaaki Kitajima, Warish Ahmed et al. The Science of The Total Environment profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Warish Ahmed Australia	52	5.1k	2.9k	2.5k	1.4k	1.4k	206	9.8k
Gertjan Medema Netherlands	44	2.7k 0.5×	2.6k 0.9×	1.4k 0.6×	750 0.5×	816 0.6×	169	8.2k
Kyle Bibby United States	53	5.4k 1.0×	925 0.3×	2.7k 1.1×	670 0.5×	1.9k 1.3×	141	10.1k
Mark D. Sobsey United States	65	5.6k 1.1×	4.2k 1.4×	769 0.3×	1.1k 0.8×	651 0.5×	284	13.5k
Ian L. Pepper United States	47	2.3k 0.4×	1.2k 0.4×	752 0.3×	411 0.3×	902 0.6×	201	7.7k
Charles N. Haas United States	52	2.7k 0.5×	2.9k 1.0×	495 0.2×	729 0.5×	760 0.5×	278	9.7k
Kara L. Nelson United States	53	1.1k 0.2×	3.0k 1.0×	1.5k 0.6×	946 0.7×	382 0.3×	139	7.8k
Masaaki Kitajima Japan	47	7.1k 1.4×	1.1k 0.4×	2.7k 1.1×	162 0.1×	971 0.7×	154	8.9k
Nicholas J. Ashbolt Australia	57	1.7k 0.3×	5.1k 1.8×	767 0.3×	1.6k 1.2×	1.9k 1.3×	267	12.7k
Eiji Haramoto Japan	41	4.8k 0.9×	1.1k 0.4×	1.5k 0.6×	140 0.1×	635 0.5×	152	6.3k
Amy Pruden United States	67	972 0.2×	2.0k 0.7×	1.7k 0.7×	800 0.6×	3.7k 2.6×	269	17.4k

Countries citing papers authored by Warish Ahmed

Since Specialization

Citations

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

Fields of papers citing papers by Warish Ahmed

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Warish Ahmed

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

Roiko, Anne, Warish Ahmed, Paul L. Fisher, et al.. (2025). The use of faecal indicator organisms to manage microbial health risks in recreational waterways not impacted by point sources of sewage: a systematic review of the epidemiological evidence. Journal of Water and Health. 23(5). 563–586.

Ahmed, Warish, et al.. (2025). Surveillance of Japanese encephalitis virus in piggery effluent and environmental samples: a complementary tool for outbreak detection. Applied and Environmental Microbiology. 91(9). e0089525–e0089525. 1 indexed citations

Novak, Nicole L., Michael Farrell, Emily Garner, et al.. (2024). Determinants of antimicrobial resistance in biosolids: A systematic review, database, and meta-analysis. The Science of The Total Environment. 957. 177455–177455. 5 indexed citations

Smith, Wendy, Yawen Liu, Stuart L. Simpson, et al.. (2024). Development and comparative assessment of RT-qPCR and duplex RT-LAMP assays for the monitoring of Aichi virus A (AiV-A) in untreated wastewater samples. The Science of The Total Environment. 952. 175440–175440. 1 indexed citations

Lau, Colleen L., Phong K. Thai, Warish Ahmed, et al.. (2023). Wastewater Surveillance Can Function as an Early Warning System for COVID-19 in Low-Incidence Settings. Tropical Medicine and Infectious Disease. 8(4). 211–211. 8 indexed citations

Demeter, Katalin, Rita Linke, Elisenda Ballesté, et al.. (2023). Have genetic targets for faecal pollution diagnostics and source tracking revolutionized water quality analysis yet?. FEMS Microbiology Reviews. 47(4). 26 indexed citations

Murakami, Michio, et al.. (2023). Wastewater-based prediction of COVID-19 cases using a highly sensitive SARS-CoV-2 RNA detection method combined with mathematical modeling. Environment International. 173. 107743–107743. 46 indexed citations

Li, Jiaying, Warish Ahmed, Suzanne Metcalfe, et al.. (2023). Impact of sewer biofilms on fate of SARS-CoV-2 RNA and wastewater surveillance. Nature Water. 25 indexed citations

Li, Jiaying, Rory Verhagen, Warish Ahmed, et al.. (2022). In Situ Calibration of Passive Samplers for Viruses in Wastewater. ACS ES&T Water. 2(11). 1881–1890. 18 indexed citations

10.

Haas, Charles N., Aaron Bivins, Warish Ahmed, Kerry A. Hamilton, & Stuart J. Khan. (2021). Discussion on “Potential discharge, attenuation and exposure risk of SARS-CoV-2 in natural water bodies receiving treated wastewater”. npj Clean Water. 4(1). 2 indexed citations

11.

Sherchan, Samendra P., Shalina Shahin, Lauren Ward, et al.. (2020). First detection of SARS-CoV-2 RNA in wastewater in North America: A study in Louisiana, USA. The Science of The Total Environment. 743. 140621–140621. 381 indexed citations

12.

Ahmed, Warish, Aaron Bivins, Paul M. Bertsch, et al.. (2020). Intraday variability of indicator and pathogenic viruses in 1-h and 24-h composite wastewater samples: Implications for wastewater-based epidemiology. Environmental Research. 193. 110531–110531. 75 indexed citations

13.

Ahmed, Warish, Aaron Bivins, Paul M. Bertsch, et al.. (2020). Surveillance of SARS-CoV-2 RNA in wastewater: Methods optimization and quality control are crucial for generating reliable public health information. Current Opinion in Environmental Science & Health. 17. 82–93. 129 indexed citations

14.

Ahmed, Warish, et al.. (2017). Evaluation of the novel crAssphage marker for sewage pollution tracking in storm drain outfalls in Tampa, Florida. Water Research. 131. 142–150. 94 indexed citations

15.

Ahmed, Warish, et al.. (2010). Evaluating sewage-associated JCV and BKV polyomaviruses for sourcing human fecal pollution in a coastal river in Southeast Queensland, Australia. QUT ePrints (Queensland University of Technology). 43 indexed citations

16.

Ahmed, Warish, et al.. (2010). Health risk from the use of roof-harvested rainwater in Southeast Queensland, Australia, as potable or nonpotable water, determined using quantitative microbiobial risk assessment. QUT ePrints (Queensland University of Technology). 147 indexed citations

17.

Ahmed, Warish, Rita Yusuf, Imtiaj Hasan, Ashantha Goonetilleke, & Ted Gardner. (2010). Quantitative PCR assay of sewage-associated bacteroides markers to assess sewage pollution in an urban lake in Dhaka, Bangladesh. USC Research Bank (University of the Sunshine Coast). 1 indexed citations

18.

Stratton, Helen, Warish Ahmed, & Mohammad Katouli. (2009). A consensus: microbial source tracking (MST) in water. Microbiology Australia. 30(1). 30–32. 2 indexed citations

19.

Ahmed, Warish, et al.. (2009). Microbial risks from rainwater tanks in South East Queensland. Water. 8 indexed citations

20.

Ahmed, Warish, Ashantha Goonetilleke, Daniel Powell, Kanika Chauhan, & Ted Gardner. (2009). Comparison of molecular markers to detect fresh sewage in environmental waters. QUT ePrints (Queensland University of Technology). 1 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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