Karen Shapiro

2.5k total citations · 1 hit paper
71 papers, 1.8k citations indexed

About

Karen Shapiro is a scholar working on Parasitology, Sociology and Political Science and Infectious Diseases. According to data from OpenAlex, Karen Shapiro has authored 71 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 51 papers in Parasitology, 14 papers in Sociology and Political Science and 8 papers in Infectious Diseases. Recurrent topics in Karen Shapiro's work include Parasitic Infections and Diagnostics (42 papers), Toxoplasma gondii Research Studies (41 papers) and Sex work and related issues (11 papers). Karen Shapiro is often cited by papers focused on Parasitic Infections and Diagnostics (42 papers), Toxoplasma gondii Research Studies (41 papers) and Sex work and related issues (11 papers). Karen Shapiro collaborates with scholars based in United States, Canada and Singapore. Karen Shapiro's co-authors include Elizabeth VanWormer, Patricia A. Conrad, Jonna A. K. Mazet, John L. Largier, Aurélien Dumètre, Mary W. Silver, Isabelle Villena, Brent R. Dixon, Melissa A. Miller and Heather N. Bischel and has published in prestigious journals such as Proceedings of the National Academy of Sciences, SHILAP Revista de lepidopterología and Environmental Science & Technology.

In The Last Decade

Karen Shapiro

70 papers receiving 1.7k 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.

Environmental transmission of Toxoplasma gondii: Oocysts in water, soil and food

2019 233 citations Karen Shapiro, Elizabeth VanWormer et al. profile →

Peers

Countries citing papers authored by Karen Shapiro

Since Specialization

Citations

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

Fields of papers citing papers by Karen Shapiro

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Karen Shapiro

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

#	Work	Indexed citations
1	Postmortem Findings in Free-Ranging North American Beavers (Castor canadensis) Reveal Potential Threats to California’s Freshwater Ecosystems 2025 ·Animals ·(unknown), Leslie W. Woods, Aslı Mete, Heather Fritz, Aníbal G. Armién, (unknown), Luis A. Gómez-Puerta, (unknown), (unknown), (unknown), (unknown), Karen Shapiro, (unknown)	0
2	High prevalence and diversity of Toxoplasma gondii DNA in feral cat feces from coastal California 2023 ·PLoS neglected tropical diseases ·Sophie Zhu, (unknown), Anika Patel, Elizabeth VanWormer, Karen Shapiro	4
3	Whole genome enrichment approach for genomic surveillance of Toxoplasma gondii 2023 ·Food Microbiology ·Balaji Sundararaman, Karen Shapiro, Andrea E. Packham, (unknown), Rachel S. Meyer, Beth Shapiro, Richard E. Green	2
4	Molecular detection and viability discrimination of zoonotic protozoan pathogens in oysters and seawater 2023 ·International Journal of Food Microbiology ·Minji Kim, (unknown), Andrea E. Packham, James G. Moore, Stefan Wuertz, Karen Shapiro	4
5	Model training periods impact estimation of COVID-19 incidence from wastewater viral loads 2022 ·The Science of The Total Environment ·(unknown), (unknown), Minji Kim, (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), Colleen C. Naughton, Brad H. Pollock, Karen Shapiro, Miriam Nuño, Heather N. Bischel	18
6	The challenge of SARS-CoV-2 environmental monitoring in schools using floors and portable HEPA filtration units: Fresh or relic RNA? 2022 ·PLoS ONE ·Rogelio Zuniga-Montanez, David A. Coil, Jonathan A. Eisen, (unknown), (unknown), Minji Kim, Karen Shapiro, Heather N. Bischel	14
7	Dynamics and epidemiology of Toxoplasma gondii oocyst shedding in domestic and wild felids 2021 ·Transboundary and Emerging Diseases ·Sophie Zhu, Karen Shapiro, Elizabeth VanWormer	31
8	Quantification of viable protozoan parasites on leafy greens using molecular methods 2021 ·Food Microbiology ·(unknown), Karen Shapiro, Verónica Beatriz Rajal, Andrea E. Packham, (unknown), (unknown), Stefan Wuertz	12
9	Comparison of PCR assays to detect Toxoplasma gondii oocysts in green-lipped mussels (Perna canaliculus) 2019 ·Parasitology Research ·(unknown), Laryssa Howe, Karen Shapiro, Wendi D. Roe	10
10	First report of Toxoplasma gondii sporulated oocysts and Giardia duodenalis in commercial green-lipped mussels (Perna canaliculus) in New Zealand 2018 ·Parasitology Research ·(unknown), Laryssa Howe, (unknown), (unknown), Anthony Pita, (unknown), Émilie Vallée, David T. S. Hayman, Karen Shapiro, Wendi D. Roe	39
11	Effects of salinity and transparent exopolymer particles on formation of aquatic aggregates and their association with norovirus 2018 ·The Science of The Total Environment ·Kaitlyn Hanley, Stefan Wuertz, Alexander Schriewer, Uta Passow, Woutrina Smith, (unknown), Karen Shapiro	4
12	California mussels (Mytilus californianus) as sentinels for marine contamination with Sarcocystis neurona 2016 ·Parasitology ·(unknown), Daniel Rejmanek, (unknown), Patricia A. Conrad, Karen Shapiro	8
13	Concentration and retention of Toxoplasma gondii surrogates from seawater by red abalone (Haliotis rufescens) 2016 ·Parasitology ·(unknown), (unknown), M. Tim Tinker, James G. Moore, Patricia A. Conrad, Karen Shapiro	12
14	Coastal development and precipitation drive pathogen flow from land to sea: evidence from a Toxoplasma gondii and felid host system 2016 ·Scientific Reports ·Elizabeth VanWormer, Tim Carpenter, (unknown), Karen Shapiro, W. W. Wallender, Patricia A. Conrad, John L. Largier, Marco Maneta, Jonna A. K. Mazet	62
15	A New Pathogen Transmission Mechanism in the Ocean: The Case of Sea Otter Exposure to the Land-Parasite Toxoplasma gondii 2013 ·PLoS ONE ·(unknown), Karen Shapiro, Mary W. Silver	36
16	Simultaneous detection of Giardia lamblia and Cryptosporidium parvum (oo)cysts in soil using immunomagnetic separation and direct fluorescent antibody staining 2013 ·Journal of Microbiological Methods ·(unknown), Osnat Gillor, Ann C. Melli, Woutrina A. Miller, Stefan Wuertz, Nirit Bernstein, Karen Shapiro	10
17	Attempted Detection of Toxoplasma gondii Oocysts in Environmental Waters Using a Simple Approach to Evaluate the Potential for Waterborne Transmission in the Galápagos Islands, Ecuador 2013 ·EcoHealth ·Michelle L. Verant, Noémi d’Ozouville, Patricia G. Parker, Karen Shapiro, Elizabeth VanWormer, Sharon L. Deem	18
18	Molecules to modeling: Toxoplasma gondii oocysts at the human–animal–environment interface 2012 ·Comparative Immunology Microbiology and Infectious Diseases ·Elizabeth VanWormer, Heather Fritz, Karen Shapiro, Jonna A. K. Mazet, Patricia A. Conrad	71
19	Use of Herbal Products for Diabetes by Latinos 2002 ·Journal of the American Pharmaceutical Association (1996) ·Karen Shapiro, (unknown)	22
20	A Problem Based Learning, Case Study Approach to Pharmaceutics : Faculty and Student Perspectives 1998 ·American Journal of Pharmaceutical Education ·Ian S. Haworth, Stuart P. Eriksen, (unknown), (unknown), (unknown), (unknown), (unknown), Karen Shapiro	25

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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