Close-up of a fiber with brightly colored pathogens beside it
Microplastics in Seawater May Harbor Parasites
Laboratory experiments find that Toxoplasma, Cryptosporidium, and Giardia can congregate on microplastic beads and fibers, suggesting they might make their way into and around the world’s oceans by hitching rides on tiny bits of trash.
ABOVE: University of California, Davis
Microplastics in Seawater May Harbor Parasites
Microplastics in Seawater May Harbor Parasites

Laboratory experiments find that Toxoplasma, Cryptosporidium, and Giardia can congregate on microplastic beads and fibers, suggesting they might make their way into and around the world’s oceans by hitching rides on tiny bits of trash.

Laboratory experiments find that Toxoplasma, Cryptosporidium, and Giardia can congregate on microplastic beads and fibers, suggesting they might make their way into and around the world’s oceans by hitching rides on tiny bits of trash.

ABOVE: University of California, Davis

toxoplasma gondii

Illustration of clear cells with orange nuclei, Toxoplasma gondii, on colorful background
Turning Toxoplasma Against Cancer
Annie Melchor | Jan 3, 2022
Several research groups have found that Toxoplasma gondii infection can ramp up antitumor immune responses in mice. Can the single-cell parasite be used to develop safe treatments for humans?
Photographs of the October 2021 issue's contributors
Contributors
The Scientist Staff | Oct 1, 2021
Meet some of the people featured in the October 2021 issue of The Scientist.
the literature
Microbiology Meets Machine Learning
Ruth Williams | May 1, 2019
Artificially intelligent software has human-like ability to analyze host-pathogen interactions in microscopy images.
MO infographic
Infographic: Human-Style Image Analysis Without the Human
Ruth Williams | May 1, 2019
Artificially intelligent software has human-like ability to analyze host-pathogen interactions in microscopy images.
a kitten in a cage
Termination of USDA’s Toxoplasmosis Lab Concerns Parasitologists
Shawna Williams | Apr 10, 2019
Some researchers say the abrupt end of the program will hobble the fight against a common parasite.
Image of the Day: Parasite Stopped in Its Tracks
The Scientist Staff | Sep 26, 2018
Suppression of a signaling pathway in Toxoplasma gondii prevents the parasite from replicating in host cells.
Parasitologist, Reprogrammed: A Profile of David Roos
Anna Azvolinsky | Mar 1, 2018
After discovering a novel organelle found in protozoan parasites, the University of Pennsylvania’s Roos created a widely used eukaryotic pathogen database.
Pestilent Spread
The Scientist Staff | Feb 28, 2018
See the University of Pennsylvania's David Roos explain the process of parasite replication.
Daraprim Discounts Offered
Karen Zusi | Nov 26, 2015
Turing Pharmaceuticals will soon offer discounts to hospitals for its toxoplasmosis-fighting drug, the company announced, but some say the proposed price reductions are not enough.
Daraprim Alternative
Tracy Vence | Oct 22, 2015
A specialty pharmaceuticals company announces plans to produce a toxoplasmosis drug containing the same active ingredient as the pill at the center of an ongoing drug-pricing controversy.
Treating Toxoplasmosis
Jef Akst | Sep 25, 2015
While one company hikes the price of an old drug to treat the parasitic infection, academic researchers report that an approved blood pressure medication could be just what the doctor ordered.
The Ultimate Game of Cat and Mouse
Erin Weeks | Sep 18, 2013
Toxoplasma gondii seems to cause hard-wired changes in the brains of mice that persist even after the parasite is gone.
Parasite Spurs Rat Sexual Frenzy
Tia Ghose | Aug 19, 2011
The parasite Toxoplasma gondii furthers its transmission by making rats go wild for the scent of cat urine.
Researchers Focus on Sea Otter Deaths
A. J. S. Rayl | Feb 18, 2001
In trouble? The sea otter is dying from parasitic diseases for which the only known hosts are terrestrial mammals.