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      Relationships between leukocytes and Hepatozoon spp. In green frogs, Rana clamitans.

      1 , ,
      Journal of wildlife diseases

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          Abstract

          There are few published data on amphibian leukocyte profiles, and relationships between amphibian leukocytes and parasites are even less well known. Using counts from 35 pairs of blood smears taken 2 days apart, we tested for correlations between leukocyte proportions and infection intensities of Hepatozoon spp. (either Hepatozoon catesbianae or Hepatozoon clamatae) in green frogs (Rana clamitans). On average (SE), we counted 65.4 (1.7) lymphocytes, 14.0 (1.3) neutrophils, 19.3 (1.6) eosinophils, 0.9 (0.1) monocytes, and 0.4 (0.1) basophils per 100 leukocytes. All frogs harbored Hepatozoon spp. (median seven parasites per 100 leukocytes; range 1-250). Significant relationships were not observed between numbers of leukocytes and infection intensities of Hepatozoon spp. Among the possible explanations for these null results are that Hepatozoon spp. is benign, that Hepatozoon spp. is able to evade detection by the immune system, that Hepatozoon spp. is able to manipulate leukocyte investment, or that other unmeasured or undetected parasites were more important in affecting immune response.

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          Author and article information

          Journal
          J. Wildl. Dis.
          Journal of wildlife diseases
          0090-3558
          0090-3558
          Jan 2009
          : 45
          : 1
          Affiliations
          [1 ] Department of Biology, Acadia University, Wolfville, Nova Scotia B4P 2R6, Canada. dave.shutler@acadiau.ca
          Article
          45/1/67
          10.7589/0090-3558-45.1.67
          19204336
          cf569881-b3e2-483f-aba2-d4f329c80c33
          History

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