MAR 04, 2015 8:42 AM PST

Could NYC rats be a harbor for the plague?

WRITTEN BY: Jennifer Ellis
Rats in New York City carry a species of flea that is capable of transmitting plague pathogens.

For a new study, researchers collected more than 6,500 specimens of five well-known species of fleas, lice, and mites from 133 rats. Among them they found more than 500 Oriental rat fleas, notorious for their role in the bubonic plague, also known as the Black Death.

Researchers wanted to look most closely at the rat flea because of its potential as a vector for human disease, says Matthew Frye, an urban entomologist with Cornell University's New York State Integrated Pest Management (IPM) Program.

A Norway rat drops down a grate in New York City.

Prairie dogs and squirrels

"If these rats carry fleas that could transmit the plague to people, then the pathogen itself is the only piece missing from the transmission cycle."

Where is the plague found these days? In the United States, it's found in the American Southwest among ground squirrels, prairie dogs, and the fleas they harbor, infecting roughly 10 people each year. In other parts of the world, the incidence of plague is higher.

The plague isn't the only disease of concern. Coauthor Cadhla Firth, a research scientist at Columbia University's Center for Infection and Immunity, used molecular screening methods to look for two other pathogenic bacteria the Oriental rat flea could vector: Rickettsia (which they didn't find) and several species of Bartonella.

"These pathogens can cause a wide range of clinical syndromes, some severe," Firth says.


Food, water, shelter

The study's results, published in the Journal of Medical Entomology, suggest that public health officials closely monitor city rats and the fleas that call them home. But everyone can contribute, Frye says, by implementing practices recommended by Integrated Pest Management.

"Removing food and water and preventing access to shelter are key to knocking back rodent infestations," he says.

But evicting rats from homes and workplaces doesn't go far enough. Sanitation efforts that rid building of fleas, lice, and mice is critical. "It's not that these parasites can infest our bodies," Frye says, "but they can feed on us while seeking other rats to infest."

In research published in 2014 in the journal mBio, scientists noted a disturbing number of viral and bacterial diseases that those same 133 rats carried. Some were unknown until now, including a handful that could infect humans.

The National Institutes of Environmental Health Sciences' Center for Environmental Health partly funded the research. Other researchers from Columbia University and from the Nature Conservancy contributed to the work.

Source: Written by Syl Kacapyr-Cornell
About the Author
  • I love all things science and am passionate about bringing science to the public through writing. With an M.S. in Genetics and experience in cancer research, marketing and technical writing, it is a pleasure to share the latest trends and findings in science on LabRoots.
You May Also Like
AUG 21, 2020
Microbiology
Vaccine Aimed at Fungi May Also Protect Against MRSA
AUG 21, 2020
Vaccine Aimed at Fungi May Also Protect Against MRSA
Staphylococcus aureus is a common bacterium. If it stays on the skin it's harmless, but if it gets into the bloodstream, ...
OCT 21, 2020
Immunology
CNS's immune cells - Microglia are involved in the exacerbation of MS
OCT 21, 2020
CNS's immune cells - Microglia are involved in the exacerbation of MS
Multiple sclerosis (MS) is one of the most progressive autoimmune diseases that affect the central nervous system where ...
OCT 22, 2020
Cell & Molecular Biology
How a Gene Variant Raises the Risk of Multiple Sclerosis
OCT 22, 2020
How a Gene Variant Raises the Risk of Multiple Sclerosis
Now that sequencing the whole human genome is easier, faster, and cheaper than it used to be, scientists have been able ...
NOV 02, 2020
Immunology
New Cancer Drug Reboots Stalled Immunotherapies
NOV 02, 2020
New Cancer Drug Reboots Stalled Immunotherapies
In contrast to traditional chemotherapies, immunotherapies reprogram the patient’s own immune system to fight tumo ...
NOV 05, 2020
Immunology
Awakening Ancient DNA to Kill Cancer
NOV 05, 2020
Awakening Ancient DNA to Kill Cancer
In a recent study published in Nature, scientists from the University of Toronto described the discovery of ancient DNA ...
NOV 09, 2020
Drug Discovery & Development
COVID-19 Vaccine by Pfizer More than 90% Effective
NOV 09, 2020
COVID-19 Vaccine by Pfizer More than 90% Effective
A preliminary analysis of Pfizer and BioNTech's COVID-19 vaccine shows that it can prevent over 90% of people from c ...
Loading Comments...