Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
PLoS One. 2008;3(11):e3602. doi: 10.1371/journal.pone.0003602. Epub 2008 Nov 5.

Historical mammal extinction on Christmas Island (Indian Ocean) correlates with introduced infectious disease.

Author information

  • 1Biological Sciences Department, Old Dominion University, Norfolk, VA, USA.

Erratum in

  • PLoS ONE. 2009;4(1). doi: doi.org/10.1371/annotation/9fbe9687-682e-4010-97e4-139b33343d34. Ball, Stanley J [added].

Abstract

It is now widely accepted that novel infectious disease can be a leading cause of serious population decline and even outright extinction in some invertebrate and vertebrate groups (e.g., amphibians). In the case of mammals, however, there are still no well-corroborated instances of such diseases having caused or significantly contributed to the complete collapse of species. A case in point is the extinction of the endemic Christmas Island rat (Rattus macleari): although it has been argued that its disappearance ca. AD 1900 may have been partly or wholly caused by a pathogenic trypanosome carried by fleas hosted on recently-introduced black rats (Rattus rattus), no decisive evidence for this scenario has ever been adduced. Using ancient DNA methods on samples from museum specimens of these rodents collected during the extinction window (AD 1888-1908), we were able to resolve unambiguously sequence evidence of murid trypanosomes in both endemic and invasive rats. Importantly, endemic rats collected prior to the introduction of black rats were devoid of trypanosome signal. Hybridization between endemic and black rats was also previously hypothesized, but we found no evidence of this in examined specimens, and conclude that hybridization cannot account for the disappearance of the endemic species. This is the first molecular evidence for a pathogen emerging in a naïve mammal species immediately prior to its final collapse.

PMID:
18985148
[PubMed - indexed for MEDLINE]
PMCID:
PMC2572834
Free PMC Article

Images from this publication.See all images (3)Free text

Figure 1
Figure 2
Figure 3
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Public Library of Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk