Navigation Links
Pubic hair provides evolutionary home for gorilla lice
Date:2/11/2009

There are two species of lice that infest humans: pubic lice, Pthirus pubis, and human head and body lice, Pediculus humanus. A new article in BioMed Central's open access Journal of Biology suggests one explanation for the separation of the two species.

In the article, Robert Weiss from University College London describes how he was struck by inspiration while pondering the question of why lice would separate into two groups when our ancestors are quite uniformly hairy, "I was having difficulty envisioning a clear separation of habitats between the groin and other parts of our ancient common ancestor. My 'eureka moment' came, appropriately enough, in the shower: although naked apes have pubic hair, surely our hairy cousins don't?"

Pthirus pubis, popularly known as crabs, evolved from the structurally similar gorilla louse, Pthirus gorillae. Interestingly however, while genetic analysis carried out by David Reed at the University of Florida indicates that this split occurred around 3.3 million years ago, humans are believed to have diverged from gorillas much earlier - at least 7 million years ago - suggesting that early humans somehow caught pubic lice from their gorilla cousins. Happily, this may not be as sordid as it sounds. According to Weiss, "Before one conjures up a King Kong scenario, it should be noted that predators can pick up parasites from their prey. The close contact involved in human ancestors butchering gorillas could have enabled Pthirus to jump hosts, rather as bushmeat slaughter practices allowed HIV to invade humans from chimpanzees in modern times."

So, while head lice may be viewed as a 'family heirloom', inherited down the generations as humans have evolved, pubic lice may well be a recent and slightly unwelcome gift from the more hirsute branch of our evolutionary family.


'/>"/>

Contact: Graeme Baldwin
graeme.baldwin@biomedcentral.com
44-020-707-94804
BioMed Central
Source:Eurekalert

Page: 1

Related biology news :

1. Improved e-jet printing provides higher resolution and more versatility
2. Canada provides $1.4M for removal of hazardous trees from provincial recreation sites
3. Study involving more than 100 scientists provides new insights on green algae
4. Shell Provides Consumers Gasoline Industrys First Pay By Touch Technology at the Pump
5. Book on little-known species and conservation provides guidance to managers and others
6. HIV isolate from Kenya provides clues for vaccine design
7. Antarctic expedition provides new insights into the role of the Southern Ocean for global climate
8. Mesothelin engineered on virus-like particles provides treatment clues for pancreatic cancer
9. Scripps expedition provides new baseline for coral reef conservation
10. Researcher provides tool to enable determination of age of anchovies with greater precision
11. Research with squirrels provides clues on hormones role in human learning
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/14/2017)... 15, 2017  IBM (NYSE: IBM ) is introducing several ... dedicated to developing collaboration between startups and global businesses, taking ... During the event, nine startups will showcase the solutions they ... industries. France is ... with a 30 percent increase in the number of startups ...
(Date:5/6/2017)... RAM Group , Singaporean based ... in biometric authentication based on a novel  ... to perform biometric authentication. These new sensors are based on ... Ram Group and its partners. This sensor will have ... and security. Ram Group is a next generation ...
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... Annual Report on Form 10-K on Thursday April 13, 2017 with ... ... Relations section of the Company,s website at http://www.nxt-id.com  under "SEC ... . 2016 Year Highlights: Acquisition ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... Disappearing forests and increased emissions are the main ... people each year. Especially those living in larger cities are affected by air pollution ... of the most pollution-affected countries globally - decided to take action. , “I knew ...
(Date:10/11/2017)... Florida (PRWEB) , ... October 11, 2017 , ... ... Drug Administration (FDA) has granted orphan drug designation to SBT-100, its novel anti-STAT3 ... for the treatment of osteosarcoma. SBT-100 is able to cross the cell membrane ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that give it exclusive ... a technology developed in collaboration with Children’s Hospital Los Angeles (CHLA). ...
(Date:10/10/2017)... ... ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, Inc. ... event entitled “Stem Cells and Their Regenerative Powers,” was held on August 31st, ... was joined by two human doctors: Peter B. Hanson, M.D., Chief of Orthopedic Surgery, ...
Breaking Biology Technology: