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  E-mail Message: I thought you might be interested in this item at http://www.worldcat.org/oclc/111480718 Title: Effects of acid stress in adult Rana pipiens. Publisher: ISBN/ISSN: 1548-8969 OCLC:111480718

  
  

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Effects of acid stress in adult Rana pipiens.

Author:	M Brodkin; I Vatnick; M Simon; H Hopey; K Butler-Holston; All authors
Edition/Format:	Article : English
Publication:	Journal of experimental zoology. Part A, Comparative experimental biology, 2003 Jul 1; 298(1): 16-22
Database:	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Summary:	The decline in frog populations is a well-recognized worldwide phenomenon and infectious disease has been implicated as a major cause in the global decline of amphibian populations. Rana pipiens are disappearing from many habitats where they used to flourish, and environmental acidification has been considered as a possible contributor to this disappearance. We present a model that integrates the results of several experiments on the effects of acid exposure on natural resistance and mortality of adult Rana pipiens. These studies suggest that different components of the natural defense mechanisms of these frogs have different acid sensitivities. We have shown previously that exposure to pH 5.5 leads to a reduction in splenic white blood cell number, viability, and to colonization of the spleen with both Gram positive and Gram negative bacteria. In this paper we show that exposure to pH 6.0 did not affect the number or viability of splenic white blood cells but did result in colonization of the spleen by bacteria. We also show that cold exposure by itself does not cause a systemic bacterial infection in adult Rana pipiens, but acid stress following cold exposure does. The data presented in this paper provide empirical evidence to support the hypothesis that acid stress may be a contributor to the decline of Rana pipiens in the northeastern region of the United States.  Read more...
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