Featured Research

from universities, journals, and other organizations

Fleas collected from Norway rats in downtown Los Angeles carry human pathogen

Date:
November 17, 2011
Source:
American Society for Microbiology
Summary:
Most fleas collected from rats trapped in downtown Los Angeles, California carried microbes from the genus Bartonella, many of which are human pathogens, according to a new study.

Most fleas collected from rats trapped in downtown Los Angeles, California carried microbes from the genus Bartonella, many of which are human pathogens, according to a paper in the November Applied and Environmental Microbiology.

The research team limited their investigation to fleas of the species Xenopsylla cheopis, because they are known both to infest Rattus norvegicus, the Norway rat, which is a major pest in high density urban areas, as well as to bite humans, says first author Sarah Billeter of the Centers for Disease Control and Prevention, Fort Collins, CO.

Bartonella species are gram-negative bacteria that infect red blood cells and endothelial cells of the host. More than half are thought to cause some clinical disease in humans. B. rochalimae, found in 72 percent of the collected fleas, was first isolated from the blood of a patient who became ill after returning to the United States from a vacation in Peru, says Billeter. "She complained of fever, insomnia, nausea, headache, and mild cough. Upon examination at the hospital, she was found to have recurrent fever, splenomegaly, and anemia." B. rochalimae has also been identified as a cause of infectious endocarditis in a dog from San Francisco, says Billeter.

The remaining fleas harbored sequences most closely related to B. tribocorum, a bacterium that has been detected in rodents "from various parts of the world," including France, says Billeter, and was isolated from the blood of a febrile Thai patient. "At this point, it remains unclear whether B. tribocorum is a human pathogen," says Billeter. "From a public health standpoint, however, it is important to determine whether R. norvegicus are reservoirs for zoonotic Bartonella spp. due to their close contact with humans and their pets." The question of whether X. cheopis can actually spread such pathogens to humans also warrants further investigation, says Billeter.


Story Source:

The above story is based on materials provided by American Society for Microbiology. Note: Materials may be edited for content and length.


Journal Reference:

  1. S. A. Billeter, V. A. K. B. Gundi, M. P. Rood, M. Y. Kosoy. Molecular Detection and Identification of Bartonella Species in Xenopsylla cheopis Fleas (Siphonaptera: Pulicidae) Collected from Rattus norvegicus Rats in Los Angeles, California. Applied and Environmental Microbiology, 2011; 77 (21): 7850 DOI: 10.1128/AEM.06012-11

Cite This Page:

American Society for Microbiology. "Fleas collected from Norway rats in downtown Los Angeles carry human pathogen." ScienceDaily. ScienceDaily, 17 November 2011. <www.sciencedaily.com/releases/2011/11/111116193111.htm>.
American Society for Microbiology. (2011, November 17). Fleas collected from Norway rats in downtown Los Angeles carry human pathogen. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2011/11/111116193111.htm
American Society for Microbiology. "Fleas collected from Norway rats in downtown Los Angeles carry human pathogen." ScienceDaily. www.sciencedaily.com/releases/2011/11/111116193111.htm (accessed October 1, 2014).

Share This



More Health & Medicine News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Some Positive Ebola News: Outbreak 'Contained' In Nigeria

Some Positive Ebola News: Outbreak 'Contained' In Nigeria

Newsy (Sep. 30, 2014) The CDC says a new case of Ebola has not been reported in Nigeria for more than 21 days, leading to hopes the outbreak might be nearing its end. Video provided by Newsy
Powered by NewsLook.com
UN Ebola Mission Head: Immediate Action Is Crucial

UN Ebola Mission Head: Immediate Action Is Crucial

AFP (Sep. 30, 2014) The newly appointed head of the United Nations Mission for Ebola Emergency Response (UNMEER), Anthony Banbury, outlines operations to tackle the virus. Duration: 00:39 Video provided by AFP
Powered by NewsLook.com
CDC Confirms First Case of Ebola in US

CDC Confirms First Case of Ebola in US

AP (Sep. 30, 2014) The CDC has confirmed the first diagnosed case of Ebola in the United States. The patient is being treated at a Dallas hospital after traveling earlier this month from Liberia. (Sept. 30) Video provided by AP
Powered by NewsLook.com
New Breast Cancer Drug Extends Lives In Clinical Trial

New Breast Cancer Drug Extends Lives In Clinical Trial

Newsy (Sep. 30, 2014) In a clinical trial, breast cancer patients lived an average of 15 months longer when they received new drug Perjeta along with Herceptin. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins