Navigation Links
Globetrotting black rat genes reveal spread of humans and diseases
Date:2/1/2008

DNA of the common Black Rat (Rattus rattus) has shed light on the ancient spread of rats, people and diseases around the globe.

Studying the mitochondrial DNA of 165 Black Rat specimens from 32 countries around the world, an international team of scientists has identified six distinct lineages in the Black Rats family tree, each originating from a different part of Asia.

Black Rats are carriers of many different human diseases, including plague, typhus and leptospirosis, says CSIRO mammal expert Dr Ken Aplin, lead author of the study.

It has been unclear why certain rodent-borne diseases are more common in some places than others, but our work raises the possibility that the different lineages of Black Rats each carry a different set of diseases, which is something medical science now needs to consider.

We need to know more about what types of Black Rats are moving around the world and what disease risks each of them might pose.

The six different lineages originated in India, East Asia, the Himalayas, Thailand, the Mekong Delta, and Indonesia.

The Indian lineage spread to the Middle-East around 20,000 years ago, then later to Europe. It reached Africa, the Americas and Australia during the Age of Exploration.

The East Asian lineage moved from Taiwan to Japan, the Philippines, and Indonesia, arriving in Micronesia only 3,500 years ago.

The other four lineages have not become so widespread but they could be set to expand their ranges in the future.

Our findings also show a good match between the historic spread of each lineage and ancient routes of human migration and trade, but there are a few surprises that raise new questions about human prehistory, Dr Aplin says.

The genetic evidence points strongly to there being more than one species of black rat, but more work is needed before we can say exactly how many species there are.

The Black Rat is one of the most common of the worlds 56 Rattus species, and is also known as the house, roof or ship rat. It is found throughout Africa, Asia, Australia, Europe and the Americas.

Dr Aplin will present the results of his teams research at the Archaeological Science Conference in Canberra, Australia on Monday.


'/>"/>

Contact: Andrea Wild
andrea.wild@csiro.au
CSIRO Australia
Source:Eurekalert  

Related medicine news :

1. Wiley-Blackwell and the Cochrane Collaboration extend publishing partnership
2. Black Americans Still Wary of Clinical Trials
3. Blacks, Hispanics less likely to get strong pain drugs in emergency rooms
4. BRCA1 Mutation Prevalent Among Hispanic, Younger Black Women
5. Breast cancer gene mutation more common in Hispanic, young black women, Stanford/NCCC study finds
6. Ortho Organizers(R) Introduces Product Line Extension - Rectangular Super Elastic Nitanium(R) Black Ti(TM) Archwire
7. Blackberries, Broccoli Sprouts Battle Cancer
8. Black Women Wait Longer for Breast Cancer Surgery
9. Wiley-Blackwell and U. of Penn Health Systems Center for Evidence-Based Practice launch InfoPOEMs
10. Cookie Johnson and Abbott Bring I Stand With Magic: Campaign to End Black AIDS to Los Angeles to Educate African-American Women on HIV/AIDS
11. The Magic Johnson Foundation and Abbott Expand Focus of Campaign to End Black AIDS to African-American Women in 2008
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Globetrotting black rat genes reveal spread of humans and diseases
(Date:2/5/2016)... ... February 05, 2016 , ... ... from across the country gathered at the La Valencia Hotel in San Diego, ... PROSHRED Chicago was named the year’s most outstanding franchise, walking away with the ...
(Date:2/5/2016)... ... , ... Give To Cure today announced that it is working ... To Cure’s campaign that is crowdfunding clinical trials to help find cures faster for ... a smart device. In 2015 alone, Venmo processed $7.5 billion in transactions among users. ...
(Date:2/5/2016)... New York, New York (PRWEB) , ... February 05, 2016 , ... ... (APDA) announced the election of Patrick McDermott as Chairman of the National Board of ... welcome Pat as Chairman of the Board,” stated Leslie A. Chambers , APDA ...
(Date:2/5/2016)... ... February 05, 2016 , ... Dr. Ben Amini, ... it is now welcoming orthodontist, Dr. Amanda Cheng, to the practice. With the ... oral health care, including general dentistry, cosmetic treatments, periodontics, implant dentistry , ...
(Date:2/5/2016)... ... February 05, 2016 , ... Health and wellness is a topic that ... the event they are experiencing an illness. Migraines are a severe form of a ... with migraines would not wish the pain on their worst enemy, the feeling can ...
Breaking Medicine News(10 mins):
(Date:2/4/2016)... -- Worldwide Radiology Oncology surgical robot markets are ... systems provide a way to improve traditional open ... systems pinpoint the delivery of radiation precisely, eliminating ... problem previously, limiting the quantity of radiation that ... far beyond what has been available, promising a ...
(Date:2/4/2016)... 4, 2016  SciClone Pharmaceuticals, Inc. (NASDAQ: ... entered into a settlement agreement with the United ... the SEC,s investigation into possible violations of the ... of the settlement agreement, SciClone has agreed to ... pre-judgment interest and a penalty.  This payment is ...
(Date:2/4/2016)... , Feb. 4, 2016  Montoya Love is recognized ... the field of Pharmaceuticals. Montoya is the Regulatory Systems ... Manufacturing and selling ... Becton Dickinson provides healthcare institutions, clinical laboratories and ... fifty countries across the globe. ...
Breaking Medicine Technology: