Pthirus gorillae explained
Pthirus gorillae or gorilla louse is a species of parasitic sucking louse that afflicts gorillas.[1] It is found in the African continent, specifically in Rwanda and Democratic Republic of the Congo. P. gorillae and P. pubis (the crab louse) are the only known species that belong to the genus Pthirus, often incorrectly spelled as Phthirus (the Greek word for louse is phthir).[2] It is suggested that it is transmitted among its hosts by social grooming, shared bedding and sexual contact.[3]
All species of sucking lice feed on blood.[4] They live in close association with their hosts and complete their entire life cycle on the host.[1] Pthirus gorillae infests the same parts of the bodies of gorillas as Pthirus pubis does in humans,[5] but since the gorilla is hairier, the lice tend to range over the whole body.[6] The two also resemble each other with the exception that Pthirus gorillae has large eyes that are placed on large lateral protuberances. A short and broad sucking louse, it is about 2.20 mm long with sprawling legs and not more than 20 small abdominal setae.[3]
It was first identified from specimens of mountain gorillas in 1927 by Henry Ellsworth Ewing during a game-hunting trip in what is now the Democratic Republic of the Congo.[3] Molecular phylogenetics suggest that P. gorillae jumped from gorillas to early humans 3.3 million years ago and diverged into the present-day pubic louse.[1] [7] Researchers theorize that humans acquired the parasite while butchering or scavenging on gorilla carcasses, or sleeping in the abandoned sleeping nests of gorillas.[8] [9]
Several lice of the species were found during a necropsy in the stomach of a female gorilla from Bwindi Impenetrable National Park; she had presumably been grooming before she died.[3]
The conservation status of this species is unknown. Since its host species is critically endangered, it is likely that this species is endangered too.
External links
Notes and References
- David L. Reed . Jessica E. Light . Julie M. Allen . Jeremy J. Kirchman . 2007 . Pair of lice lost or parasites regained: the evolutionary history of anthropoid primate lice . . 5 . 7 . 10.1186/1741-7007-5-7 . 17343749 . 1828715 . free .
- Book: Robert Frederick Harwood . Maurice Theodore James . Entomology in human and animal health . 1979 . Macmillan . 978-0-02-351600-9 . 130 . registration .
- Book: Nicholas E. Newton-Fisher . Hugh Notman . James Durward Paterson . Primates of Uganda. 2006. . 978-0-387-32342-8 . 171–192 . The Parasites of the Gorillas in Bwindi Impenetrable National Park Uganda . Jessica M. Rothman . Dwight D. Bowman . Gladys Kalema-Zikusoka . John Bosco Nkurunungi . https://books.google.com/books?id=4P9u4Lrk_GkC&pg=PA188.
- Book: Bruce F. Eldridge . John D. Edman . Medical Entomology: A Textbook on Public Health and Veterinary Problems . 2004 . . 978-1-4020-1794-0 . 99–149 . Direct Injury: Phobias, Psychoses, Annoyance, Allergies, Toxins, Venoms and Myiasis . Jonathan F. Day . John D. Edman . Sidney E. Kunz . Stephen K. Wikel . https://books.google.com/books?id=C7OxOqTKYS8C&pg=PA109.
- Book: Robert S. Anderson . Richard Beatty . Stuart Church . Insects and Spiders of the World . Volume 5. Harvester ant–Leaf-cutting ant . 2003 . . 978-0-7614-7339-8 . 520–523 . https://books.google.com/books?id=V1h8nqFXjN8C&pg=PA523 . Sucking louse . registration .
- Book: Sydney Harold Skaife . Anthony Bannister . African Insect Life . 1979 . C. Struik . 978-0-86977-087-0 . 83.
- Book: May R. Berenbaum . The Earwig's Tail: A Modern Bestiary of Multi-legged Legends . 2009 . . 978-0-674-03540-9 . 24–28 . The Domesticated Crab Louse . https://books.google.com/books?id=FOlpPl_15csC&pg=PA27.
- News: Roxanne Khamsi . Pubic lice leapt from gorillas to early humans . . 7 March 2007.
- Web site: Jesse Bering . A bushel of facts about the uniqueness of human pubic hair . Bering in Mind . . 1 March 2010 . 30 September 2010.
